JP2006101130A - Manufacturing facilities - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide manufacturing facilities for preventing discontinuation of electrical signals and error in the electrical signals between a signal control device and an electric/electronic device. <P>SOLUTION: In the manufacturing facilities 20A, the transmitting signal as an input signal inputted to the electric/electronic device EE from a control device CN or as an output signal outputted to the control device CN from the electric/electronic device EE is superimposed, using code division multiple connection by the predetermined spreading code, to the power signal flowing through the power line PL for supplying the power to the electric/electronic device EE from a fixing unit FX. Moreover, the signal same as the relevant transmitting signal is also superimposed using the code division multiple connection by the other spreading code different from the predetermined spreading code. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a manufacturing facility comprising an electric / electronic device in a movable portion, and a signal control device capable of transmitting / receiving an electric signal to / from the electric / electronic device to a fixed portion other than the movable portion, For example, the present invention relates to various manufacturing facilities for manufacturing or inspecting printed wiring boards, semiconductor devices, and liquid crystal substrates.

  As a manufacturing facility provided with a signal control device that includes an electric / electronic device in a movable portion and a fixed portion other than the movable portion that can transmit and receive an electric signal to / from the electric / electronic device, for example, the following patent document 1 is a “stage apparatus”. This "stage apparatus" is configured as a substrate stage (PST) of a scanning exposure apparatus. For example, a stage (3) as a fixed part and a Y stage (9) as a movable part drive a linear motor or the like. The device (11) is provided so as to be movable. In addition, between the Y stage (9) and the surface plate (3), a vacuum pipe for sucking the substrate, a power supply cable (power line) for supplying power to the drive device (11), etc., and the Y stage (9) The signal cables (signal lines) of various sensors installed in (9) are accommodated and held in a caterpillar-shaped cable carrier (13) that can be bent in a predetermined direction (patent) Reference 1; FIGS. 1-3). “Cable bear” and “caterpillar” are registered trademarks. The numbers in parentheses correspond to the codes described in the following Patent Documents 1 and 2 (the same applies in the [Background Art] and [Problems to be Solved by the Invention] column).

  That is, the Y stage (9) is provided with a drive device (11), various sensors, etc. as electrical / electronic devices, and a stage control device (on a fixed part other than the Y stage (9)). By connecting the utility cable (12) routed from 7) through the cable track (13), the drive power is supplied to the drive device (11), etc., and the drive device (11), various sensors, etc. It is possible to exchange control signals for driving control or sensor signals output from these. Therefore, when the drive device (11), which is an electrical / electronic device, is provided on the Y stage (9), which is a movable part, power is supplied to the drive device (11), etc. from a fixed part other than the movable part. It is necessary to supply or exchange control signals and sensor signals. For this reason, generally, as in the “stage device” disclosed in Patent Document 1 below, a plurality of cables are collectively accommodated in a cable bear so that a movable part and a fixed part other than the cable and the cable are accommodated. Interference with can be avoided.

  By the way, when a plurality of cables are accommodated in such a cable bear (13), the cable bear (13) moves while changing its bending position in accordance with the movement of the Y stage (9). The cable moves in the length direction or the thickness direction. However, the thickness and hardness of the cable are often different from each other due to differences in the material, wire diameter, and number of central conductors selected depending on the type and application of the cable, such as for power supply or signal. Then, the amount of movement of each cable along with the movement of the cable track (13) differs from cable to cable, so when the bending position of the cable track (13) changes, the power supply cable is relatively thick and relatively thin. A problem has been pointed out that a soft signal cable is rubbed to cause damage or disconnection of the signal cable.

  Such disconnection of the cable is not limited to a case where a plurality of cables can be individually moved in the cable track. For example, a multi-wire core in which a plurality of cables are accommodated in a flexible resin tube called a sheath. This also occurs when the cable is housed in a cable carrier. In addition, such a cable track is not limited to a caterpillar type, and can be moved along a guide as the movable part moves, for example, after setting the length of a plurality of cables or multi-core cables with a margin. It has been found that this occurs in the same manner in so-called curtain-type and hanging-type cable bears, in which the cable is held by a plurality of holders at predetermined intervals, and is easier to disconnect than the caterpillar type .

  The problem regarding the cable disconnection in these cable bearers is that, for example, by adopting a wireless data communication system, if the signal cable responsible for transmission of control signals, detection signals, etc. is eliminated, the gap between the movable part and the fixed part Since it is sufficient to provide one cable for power supply for tying, it can be considered that the problem can be solved by housing one cable in the cable bear.

  However, in the factory premises where various manufacturing facilities are installed, the noise generated from them has a wide frequency band and strong electric field strength, which is due to the spread spectrum communication system having a relatively high resistance to noise. However, it is difficult to prevent communication errors. For this reason, when the wireless data communication system is adopted, the transmission efficiency is lowered in the control signal and the detection signal because the transmission efficiency is lowered due to the frequent occurrence of such communication errors as compared with the wired communication. This may lead to a new problem that it is difficult to sufficiently meet the specifications of manufacturing facilities that require strict real-time performance.

Therefore, by adopting the following Patent Document 2 “Wired Spread Spectrum Communication Device and Communication Method” proposed and disclosed by the present inventor, multiplexed control signals and detection signals are superimposed on the power supply cable. If transmitted, the signal cable can be abolished as in the case of the wireless data communication system described above. Therefore, it is possible to keep the cable accommodated in the cable bear to one power supply cable (Patent Document 2; Paragraph No. 0075), and since it becomes wired transmission instead of wireless transmission, it is freed from occurrence of communication errors. It can be considered as well.
JP 2003-37153 A (2nd to 7th pages, FIGS. 1 to 3) Japanese Patent Laid-Open No. 2001-144653 (2nd to 13th pages, FIGS. 1 to 11)

  However, as described above, very powerful noise is generated over a wide frequency band from motors, sequencers, control computers, and the like that constitute various manufacturing facilities in the factory premises. Therefore, even if the wired spread spectrum communication device disclosed in Patent Document 2 transmits a control signal exchanged between the fixed part and the movable part superimposed on the power signal flowing in the power supply cable, the communication is performed. It is extremely difficult to prevent the occurrence of errors almost completely. Therefore, since it is necessary to correct the error caused by the communication error, the transmission delay caused by this is a functional failure as in the case of wireless data communication for manufacturing equipment that strictly requires real-time performance. Can be.

  For example, manufacturing equipment required to exchange a large amount of data such as when sending image data from a camera device equipped with a CMOS image sensor, a CCD image sensor, etc. provided in a movable part to a fixed part, For manufacturing equipment that requires extremely fast real-time performance to control moving parts, such as when controlling industrial robots, simply combine the disclosed technology of Patent Document 1 with the disclosed technology of Patent Document 2. It is difficult to fully meet the specification requirements by simply using it.

  Also, although it is difficult to disconnect because there is only one, considering the case where the power supply cable is disconnected in the cable track, maintenance work is required to replace the disconnected power supply cable with a new power supply cable. Production facilities must be shut down during such recovery times. Further, if such a recovery time is prolonged, there is a problem that the operating rate of the manufacturing facility is lowered, and as a result, the production efficiency can be directly reduced. Further, when the signal cable is laid, the same problem may occur if the production facility is stopped due to the disconnection.

The present invention has been made to solve the above-described problems, and an object of the present invention is to prevent electrical signal interruption and electrical signal error between the signal control device and the electrical / electronic device. It is to provide manufacturing equipment.
Another object of the present invention is to provide a production facility capable of suppressing a reduction in operating rate due to disconnection of a power line or a signal line.

  In order to achieve the above object, the manufacturing facility according to claim 1 described in the claims includes an electric / electronic device in the movable portion and a fixed portion other than the movable portion between the electric / electronic device. A manufacturing facility including a signal control device capable of transmitting and receiving electrical signals at the power line, capable of supplying power from the fixed portion to the electrical / electronic device, and input from the signal control device to the electrical / electronic device A transmission signal as an input signal to be transmitted or an output signal output from the electric / electronic device to the signal control device is superimposed on a power signal flowing through the power line using code division multiple access by a predetermined spreading code. The signal transmission is performed between the electronic device and the signal control device, and the same signal as the transmission signal is transmitted using the code division multiple access by another spreading code different from the predetermined spreading code. And technical features in that it comprises a signal transmission unit for performing signal transmission between superimposed on the power signal flowing through the line the electrical and electronic equipment and the signal control equipment. The code division multiple access is also referred to as CDMA (Code Division Multiple Access).

  Further, in the manufacturing facility according to claim 2 described in the claims, in claim 1, the power line is plural, and the signal transmission means sends the same signal as the transmission signal to the plural power lines. A technical feature is to superimpose a flowing power signal using code division multiple access.

  Furthermore, in the manufacturing facility according to claim 3 described in claim, in claim 1 or 2, another power line capable of supplying power from the fixed portion to the electric / electronic device, and the power line Power line switching means switchable to another power line, and the signal transmission means performs code division multiple access to the same signal as the transmission signal and the power signal of the other power line switched by the power line switching means. It is a technical feature to use and superimpose.

  In order to achieve the above object, the manufacturing facility according to claim 4 described in the claims includes an electric / electronic device in the movable portion and a fixed portion other than the movable portion between the electric / electronic device. A manufacturing facility including a signal control device capable of transmitting and receiving an electrical signal at the plurality of power lines capable of supplying power from the fixed portion to the electrical / electronic device, and from the signal control device to the electrical / electronic device A transmission signal as an input signal input to the signal or an output signal output from the electric / electronic device to the signal control device, and a power signal that flows through one of the plurality of power lines using code division multiple access And transmitting the signal between the electric / electronic device and the signal control device, and superimposing the same signal as the transmission signal on a power signal flowing through another power line of the plurality of power lines. It and a signal transmission means for transmitting signals between said signal control apparatus and a child apparatus that technically characterized.

  In addition, the manufacturing facility according to claim 5 described in the claims is characterized in that in claim 4, the manufacturing facility includes power line switching means capable of switching the one power line to the other power line.

  Furthermore, in the manufacturing facility according to claim 6, the input signal input from the signal control device to the electric / electronic device or the electric device according to any one of claims 1 to 5. -It is provided with one or more signal lines capable of transmitting an output signal output from an electronic device to the signal control device, and the signal transmission means uses the same signal as the transmission signal for the signal line using code division multiple access The technical feature is that

  Furthermore, in the manufacturing facility according to claim 7, the signal line capable of transmitting the transmission signal and the signal line can be switched to the other signal line. Signal line switching means, and the signal transmission means sends the same signal as the transmission signal to the other signal lines switched by the signal line switching means using code division multiple access. Technical features.

  In order to achieve the above object, in the manufacturing facility according to claim 8 described in the claims, an electric / electronic device is provided in the movable portion, and a fixed portion other than the movable portion is connected to the electric / electronic device. A manufacturing facility comprising a signal control device capable of transmitting and receiving electrical signals at an input signal input from the signal control device to the electrical / electronic device or output from the electrical / electronic device to the signal control device A plurality of signal lines capable of transmitting a transmission signal as an output signal, and the transmission signal is transmitted to one of the plurality of signal lines by using code division multiple access. Between the electric / electronic device and the signal control device by transmitting the same signal as the transmission signal to the other signal line of the plurality of signal lines. Signal transmission that performs signal transmission with And technical comprising: a stage, a.

  Further, in the manufacturing facility according to claim 9 described in the claims, in claim 8, among the plurality of signal lines, there is another signal line to which the transmission signal is not transmitted by the signal superimposing means. A signal line switching unit capable of switching a signal line through which the transmission signal is sent out by the signal transmission unit to the other signal line, and the signal transmission unit outputs the same signal as the transmission signal to the signal line. A technical feature is that the other signal lines switched by the switching means are also transmitted using code division multiple access.

  Furthermore, in the manufacturing facility according to claim 10, wherein the signal transmission means is different from a predetermined spreading code for spreading the transmission signal, according to any one of claims 4 to 9. The technical feature is to perform the code division multiple access by spreading the same signal using a spreading code.

  In order to achieve the above object, in the manufacturing facility according to claim 11 described in the claims, an electric / electronic device is provided in the movable portion, and a fixed portion other than the movable portion is provided between the electric / electronic device. A manufacturing facility including a signal control device capable of transmitting and receiving an electric signal at the power line, a power line capable of supplying power from the fixed portion to the electric / electronic device, and an input from the signal control device to the electric / electronic device A transmission signal as an input signal to be transmitted or an output signal output from the electric / electronic device to the signal control device is superimposed on a power signal of the power line using code division multiple access, and the electric / electronic device and the signal And a signal transmission means for performing signal transmission with the control device.

  According to the first aspect of the present invention, an input signal input from the signal control device to the electric / electronic device or a signal control device from the electric / electronic device is used as the power signal flowing through the power line for supplying electric power from the fixed portion to the electric / electronic device. The transmission signal as an output signal to be output is superimposed using code division multiple access with a predetermined spreading code, and the same signal as the transmission signal is code-divided with another spreading code different from the predetermined spreading code Superimposed using multiple access.

  Accordingly, these electric signals can be exchanged between the electric / electronic device and the signal control device without providing a signal line for transmitting the transmission signal. For example, the power line and the signal line in the cable bear This prevents the occurrence of a situation in which the power line and the signal line are rubbed in the cable track and the signal line is disconnected by moving the movable part to the fixed part by moving the movable part. can do. Moreover, since it is superimposed on the power signal using code division multiple access, even if there are a plurality of different transmission signals, the noise resistance characteristics can be improved. For this reason, it is possible to suppress the occurrence of a signal error due to mixing of external noise.

  The transmission and reception of these electric signals is performed by code division multiple access using a predetermined spreading code and code division multiple access using another spreading code different from the predetermined spreading code. That is, the transmission signal and the same signal are spread by different spreading codes and superimposed on the power signal. Thereby, for example, since one power line can be logically divided into two or more channels, a logical transmission path can be made redundant by flowing the same signal to these logical channels. . For this reason, even if a transmission error occurs in signal transmission through one logical channel, the code division multiple access of another logical channel is performed by a spreading code different from the spreading code used in the code division multiple access of the one logical channel. Therefore, there is a low possibility that a transmission error will occur in signal transmission through the other logical channel. For this reason, a transmission error by one logical channel can be recovered by a transmission signal by another logical channel.

  Therefore, error-free signal transmission can be performed without performing error correction processing due to the transmission error, and the occurrence of communication errors can be almost completely prevented. It is possible to suppress electrical signal interruption and electrical signal errors. For this reason, it is possible to meet the demand for manufacturing facilities that require extremely high-speed real-time performance.

  In addition, for example, when increasing the number of transmission signals, it is possible to easily cope by assigning a spreading code that is not used in code division multiple access of other transmission signals to the spreading code of the transmission signal to be increased. it can. Therefore, it is possible to reduce the maintenance man-hour for the increase of the electric signal between the signal control device and the electric / electronic device. Further, since the same signal is spread by a spreading code different from a predetermined spreading code for spreading the transmission signal and code division multiple access is performed, even if the transmission signal and the same signal are superimposed on the same power signal, Can be despread individually. For this reason, even if these signals are the same signals, they can be separated by a relatively simple configuration. Also, for example, when the number of signals of the same signal superimposed on the same power signal is an odd number and some of them have a transmission error, recovery can be performed by the majority method. Therefore, with a relatively simple configuration, electrical signal interruption and electrical signal errors can be suppressed, and maintenance man-hours for the addition of electrical signals can be reduced.

In the invention of claim 2, there are a plurality of power lines for supplying electric power from the fixed part to the electric / electronic device, and the same signal as the transmission signal is superimposed on the power signals of the plurality of power lines using code division multiple access. As a result, the same signal as the transmission signal is superimposed on the power signals of the plurality of power lines, so that the physical transmission path can have a redundant configuration.
For this reason, for example, even if one of the plurality of power lines is disconnected, a transmission signal can be sent through the remaining power lines, so that the electric / electronic device moves relative to the fixed part by moving the movable part. Thus, for example, even if a situation occurs in which the power lines rub against each other in the cable bear and some of them break, if there is still one unbroken power line, the power is transmitted via the power line. Supply and exchange of electrical signals can be ensured. Therefore, not only electrical signal interruption and electrical signal error between the signal control device and the electric / electronic device can be suppressed, but also the manufacturing equipment is not stopped due to such disconnection of the power line. A decrease in operating rate due to disconnection can be suppressed. For this reason, it is possible to meet the demand for manufacturing equipment that requires extremely high-speed real-time performance.

  In the invention of claim 3, the same signal as the transmission signal is superimposed by the signal transmission means on the power signal of the other power line switched by the power line switching means using code division multiple access. Thereby, for example, when another power line is set as a spare power line, when the power line that has been supplying power is disconnected, the power supply switching means disconnects the supply of power and the transmission / reception of the electrical signal. It is possible to easily switch from the power line to the other power line. Therefore, it is possible not only to suppress electrical signal interruption and electrical signal error between the signal control device and the electric / electronic device, but also to facilitate maintenance work at the time of such power line disconnection, Since the recovery time can be shortened, it is possible to suppress a reduction in operating rate due to disconnection of the power line.

  According to a fourth aspect of the present invention, an input signal or an electric signal input from the signal control device to the electric / electronic device is used as a power signal for one of the plurality of electric power lines for supplying electric power from the fixed portion to the electric / electronic device. A transmission signal as an output signal output from an electronic device to a signal control device is superimposed using code division multiple access, and the other power line among a plurality of power lines is the same as the transmission signal in the power signal. The signal is superimposed using code division multiple access.

  Accordingly, these electric signals can be exchanged between the electric / electronic device and the signal control device without providing a signal line for transmitting the transmission signal. For example, the power line and the signal line in the cable bear This prevents the occurrence of a situation in which the power line and the signal line are rubbed in the cable track and the signal line is disconnected by moving the movable part to the fixed part by moving the movable part. can do. Moreover, since it is superimposed on the power signal using code division multiple access, even if there are a plurality of different transmission signals, it can be transmitted on any one of the plurality of power lines. Noise characteristics can be improved. For this reason, it is possible to suppress the occurrence of a signal error due to mixing of external noise.

  In addition, these electric signals are transmitted and received by transmission signals that are separately superimposed on a power signal that flows through one power line and a power signal that flows through another power line among a plurality of power lines. That is, the transmission signal and the same signal are physically divided into two or more channels, spread by the same spreading code, and superimposed on the power signal, thereby making the physical transmission path redundant. Thereby, for example, even if a transmission error occurs in signal transmission by one physical channel, code division multiple access of another physical channel is performed by another power line different from the power line of the one physical channel. There is a low possibility that a transmission error will occur in signal transmission using the other physical channel. For this reason, a transmission error by one physical channel can be recovered by a transmission signal by another physical channel.

  Therefore, error-free signal transmission can be performed without performing error correction processing due to the transmission error, and the occurrence of communication errors can be almost completely prevented. It is possible to suppress electrical signal interruption and electrical signal errors. For this reason, it is possible to meet the demand for manufacturing facilities that require extremely high-speed real-time performance.

  In addition, when the number of transmission signals is increased, it can be easily handled by assigning a spreading code that is not used in code division multiple access of other transmission signals to the spreading code of the transmission signal to be increased. Therefore, it is possible to reduce the maintenance man-hour for the increase of the electric signal between the signal control device and the electric / electronic device.

  In the invention of claim 5, since the same signal as the transmission signal is superimposed by the signal transmission unit on the power signal of the other power line switched by the power line switching unit using code division multiple access, for example, By setting the power line as a spare power line, when the power line that has been supplying power until then is disconnected, the power line switching means transfers power and transfers electrical signals from the disconnected power line to the other power line. It can be switched easily. Therefore, not only electrical signal interruption and electrical signal error between the signal control device and electrical / electronic device can be suppressed, but also maintenance work at the time of power line disconnection is facilitated, and recovery time from disconnection failure is reduced. Since it can shorten, the fall of the operation rate by the disconnection of a power line can be suppressed.

  In the invention of claim 6, signal transmission is also performed to one or more signal lines capable of transmitting an input signal input from the signal control device to the electric / electronic device or an output signal output from the electric / electronic device to the signal control device. The same signal as the transmission signal is transmitted by means of code division multiple access. As a result, the same signal as the transmission signal is sent not only to the power line but also to the one or more signal lines, so that the physical transmission path is made redundant. For example, normally, by transmitting and receiving an electrical signal through the one or more signal lines, even if all of these signal lines that are relatively easily disconnected compared to the power line are disconnected, a transmission signal is sent through the power line. be able to. For this reason, the movement of the movable part causes the electric / electronic device to move with respect to the fixed part. For example, a situation occurs in which the power line and the signal line are rubbed in the cable carrier and all the signal lines are disconnected. However, if even one unbroken power line remains, power supply and transmission / reception of an electrical signal can be ensured through the power line.

  According to the seventh aspect of the present invention, the same signal as the transmission signal is transmitted by the signal transmission unit to the other signal lines switched by the signal line switching unit using code division multiple access. Thereby, for example, when another signal line is set as a spare signal line, when the signal line that has been transmitting the transmission signal is disconnected, the transmission / reception of the electric signal is disconnected by the signal line switching means. The signal line can be easily switched to the other signal line. Therefore, it is possible not only to suppress electrical signal interruption and electrical signal error between the signal control device and the electric / electronic device, but also to facilitate maintenance work at the time of signal line disconnection. Recovery time can be shortened.

  In the invention of claim 8, a plurality of signal lines capable of transmitting an input signal input from the signal control device to the electric / electronic device or an output signal output from the electric / electronic device to the signal control device include a transmission signal and The same signal is sent to at least two of the plurality of signal lines using code division multiple access. As a result, the same signal as the transmission signal is sent to at least two or more of the plurality of signal lines using code division multiple access. If even one of these signals remains unbroken, the signal line passes through the signal line. Thus, it is possible to ensure the transmission and reception of electrical signals. Moreover, since it is superimposed on the signal line using code division multiple access, even if there are a plurality of different transmission signals, it can be transmitted by one signal line, and noise resistance can be further improved.

  For this reason, for example, a power line and a signal line are mixed in the cable carrier, and the electric / electronic device moves relative to the fixed part due to the movement of the movable part, so that the power line and the signal line are rubbed and relatively disconnected. Even if a situation in which an easy signal line is disconnected occurs, if at least one signal line without disconnection remains, the transmission and reception of an electrical signal can be ensured through the signal line. Therefore, it is possible to suppress electrical signal interruption and electrical signal error between the electrical / electronic device provided in the movable part. For this reason, it is possible to meet the demand for manufacturing facilities that require extremely high-speed real-time performance.

  According to the ninth aspect of the present invention, the same signal as the transmission signal is transmitted by the signal transmission unit to the other signal lines switched by the signal line switching unit using code division multiple access. Thereby, for example, when another signal line is set as a spare signal line, when the signal line that has been transmitting the transmission signal is disconnected, the transmission / reception of the electric signal is disconnected by the signal line switching means. The signal line can be easily switched to the other signal line. Therefore, it is possible not only to suppress electrical signal interruption and electrical signal error between the signal control device and the electric / electronic device, but also to facilitate maintenance work at the time of signal line disconnection. Recovery time can be shortened.

  In the invention of claim 10, the signal transmission means performs code division multiple access by spreading the same signal with a spreading code different from a predetermined spreading code for spreading the transmission signal. As a result, even if the transmission signal and the same signal are sent to the same transmission medium (power line, signal line), these signals can be individually despread. For example, physically one power line Can be logically divided into two or more channels, so that the logical transmission path can be made redundant by flowing the same signal through these logical channels. For this reason, even if a transmission error occurs in signal transmission through one logical channel, the code division multiple access of another logical channel is performed by a spreading code different from the spreading code used in the code division multiple access of the one logical channel. Therefore, there is a low possibility that a transmission error will occur in signal transmission through the other logical channel. For this reason, a transmission error by one logical channel can be recovered by a transmission signal by another logical channel. Therefore, error-free signal transmission can be performed without performing error correction processing due to the transmission error, and the occurrence of communication errors can be almost completely prevented. It is possible to suppress electrical signal interruption and electrical signal errors.

  In the invention of claim 11, an input signal input from the signal control device to the electric / electronic device or a signal control device from the electric / electronic device is used as the power signal flowing through the power line for supplying electric power from the fixed portion to the electric / electronic device. The transmission signal as the output signal output to the signal line is superimposed on the power signal of the power line using code division multiple access, and signal transmission is performed between the electric / electronic device and the signal control device. Accordingly, these electric signals can be exchanged between the electric / electronic device and the signal control device without providing a signal line for transmitting the transmission signal. For example, the power line and the signal line in the cable bear This prevents the occurrence of a situation in which the power line and the signal line are rubbed in the cable track and the signal line is disconnected by moving the movable part to the fixed part by moving the movable part. can do. Moreover, since it is superimposed on the power signal using code division multiple access, even if there are a plurality of different transmission signals, the noise resistance characteristics can be improved. For this reason, it is possible to suppress the occurrence of a signal error due to mixing of external noise.

Hereinafter, an embodiment of a production facility of the present invention will be described with reference to the drawings.
First, a basic configuration example of a manufacturing facility to which the present invention is applied will be described with reference to FIGS. 1 to 4, a transmission signal is transmitted between the control device CN provided in the fixed part FX of the manufacturing equipment and the electric / electronic device EE provided in the movable part MV of the manufacturing equipment. Mainly shows signal transmission devices and transmission lines that exchange (input signals and output signals), and omits mechanical components that realize the main functions of the manufacturing equipment and electrical components that accompany them. Please note that this is done.

  In addition, the fixed part FX of the manufacturing equipment generally refers to a part that does not move with respect to the floor surface of the factory premises such as a surface plate constituting the manufacturing equipment, but is not limited thereto, and is not limited to the movable part MV. As long as the existing position is relatively fixed, this includes a case where the entire existing position fluctuates. For example, in the case of a movable industrial robot, if the arm portion movably provided on the support main body portion of the robot is a movable portion MV, the support main body portion itself is movable with respect to the floor surface. Since the arm portion is relatively fixed, the support main body portion can correspond to the fixing portion FX. On the other hand, the movable part MV of the manufacturing facility indicates a part that can move relative to the fixed part FX.

  The control device CN is composed of a semiconductor memory device, an input / output interface, and the like centering on a microprocessor, and is a so-called sequencer or a microcomputer unit for hardware control (hereinafter referred to as “microcomputer unit”). Or a personal computer etc. correspond to this. Furthermore, the electric / electronic equipment EE includes, in addition to actuators driven by electromagnets and motors, various electronic equipment controlled by a microcomputer unit, inverter circuit units for controlling DC brushless motors, motors, etc. It is a concept including various kinds of sensor elements such as electric devices, pressure sensors, acceleration sensors, temperature sensors, and the like.

  As shown in FIG. 1 (A) to FIG. 1 (C), in the manufacturing facilities 20A to 20C, between the electric / electronic device EE provided in the movable part MV and the control device CN provided in the fixed part FX. Are connected by the power line PL. That is, a configuration is adopted in which a transmission signal exchanged between the control device CN and the electric / electronic device EE, for example, a control signal, a sensor signal, or the like is supplied to one or more power lines PL. The power line PL is housed in, for example, a caterpillar type cable bearer that can be bent in a predetermined direction or a flexible (for example, resin) bellows-cylindrical cable bear.

  That is, in the manufacturing facility 20A shown in FIG. 1A, the transmitting unit 30As that is electrically connected to the control device CN is connected to the fixed unit FX, and the receiving unit 30Ar that is electrically connected to the electric / electronic device EE. Are respectively provided in the movable part MV, and the two are connected by a single power line PL. The transmitting unit 30As and the receiving unit 30Ar constitute a signal transmission device 30A as a pair. For example, predetermined control signals D1 to Dn (n output from the control device CN to the electric / electronic device EE are provided. Is the number of bits of data constituting one signal unit) and the same signal is diffused by mutually different spreading codes and superposed on the power signal flowing through the power line PL. This function will be described later in detail with reference to FIG. 6 and FIG. The configuration shown in FIG. 1 (A) can correspond to the invention of claim 1 described in the scope of claims, and the signal transmission device 30A includes a signal transmission means described in the scope of claims. ".

  As a result, since one power line PL is physically divided into two or more channels, a logical transmission path can be made redundant by flowing the same signal through these logical channels. . For example, even if a transmission error occurs in signal transmission through the logical channel LPch1, the code division multiple access of another logical channel LPch2 is performed by a spreading code different from the spreading code used in the code division multiple access of the logical channel LPch1. Therefore, there is a low possibility that a transmission error will occur in signal transmission using the other logical channel LPch2. For this reason, it is possible to recover a transmission error caused by the logical channel LPch2 using a transmission signal obtained from another logical channel LPch2. Accordingly, since error-free signal transmission can be performed without performing error correction processing due to the transmission error, communication errors can be almost completely prevented.

  Further, in the signal transmission device 30A of the manufacturing facility 20A, the control signals D1 to Dn can be sent from the control device CN to the electric / electronic device EE without providing signal lines for transmitting the predetermined control signals D1 to Dn. Therefore, for example, it is not necessary to provide a signal line in the cable bear in addition to the power line PL. Therefore, the electric / electronic device EE is moved relative to the fixed portion FX by the movement of the movable portion MV, thereby preventing the occurrence of a situation where the power line PL and the signal line are rubbed in the cable bear and the signal line is disconnected. It becomes possible. Furthermore, since it is superimposed on the power signal of the power line PL using code division multiple access, even if there are a plurality of different transmission signals, it can be transmitted by one power line PL, and noise resistance characteristics are further improved. be able to. For this reason, it is possible to suppress the occurrence of a signal error due to mixing of external noise.

  As described above, in this embodiment, the signal transmission is basically performed by one power line PL, but is electrically connected to the control device CN like the signal transmission device 30B of the manufacturing facility 20B shown in FIG. 1 (B). A configuration in which the transmission unit 30Bs and the reception unit 30Br electrically connected to the electric / electronic device EE are connected by a plurality of power lines PL may be employed.

  As a result, as will be described later with reference to FIGS. 8 to 11, the same signals as the control signals D1 to Dn can be superimposed on the power signals of the plurality of power lines PL, so that the same signals are sent to these physical channels PPch. Thus, the physical transmission path can be made redundant. For example, even if one of the plurality of power lines PL is disconnected and the physical channel PPch1 cannot be used, the control signals D1 to Dn can be transmitted through the physical channel PPch2 and the like by the remaining power line PL. For this reason, when the electric / electronic device EE moves with respect to the fixed portion FX due to the movement of the movable portion MV, for example, the power lines PL are rubbed in the cable bear, and some of them are disconnected, resulting in a physical channel. Even if a situation where PPch1, PPch2, etc. cannot be used occurs, if at least one power line PL without disconnection remains, power supply and transmission / reception of control signals D1 to Dn via the physical channel PPch3 by the power line PL Can be secured. The configuration shown in FIG. 1 (B) can correspond to the inventions of claims 2 and 4 described in the claims. Further, the signal transmission device 30B can correspond to “signal transmission means” recited in the claims.

  Further, like the signal transmission device 30C of the manufacturing facility 20C shown in FIG. 1 (C), the transmission unit 30Cs electrically connected to the control device CN and the reception unit electrically connected to the electric / electronic device EE. The power line PL can be switched to another power line PL ′ by connecting the power line 30Cr to the power line PL with a plurality of power lines PL and providing another power line PL ′ capable of supplying power from the fixed portion FX to the electric / electronic device EE. A configuration including a simple switching unit 40 may be employed.

  Accordingly, as described later with reference to FIGS. 8 to 11, the same signals as the control signals D1 to Dn can be superimposed not only on the plurality of power lines PL but also on such other power lines PL ′. Thus, for example, if the power line PL ′ is set as a spare power line, when the power line PL that has been supplying power is disconnected, the switching unit 40 supplies power and receives control signals D1 to Dn. Can be easily switched from the disconnected power line PL to the other power line PL ′. Therefore, since the maintenance work is facilitated, it is possible to shorten the recovery time from the disconnection failure. The configuration of the switching unit 40 will be described later. The configuration shown in FIG. 1C can correspond to the invention of claim 3 and the invention of claim 5, respectively, and the signal transmission device 30C is within the scope of the claims. This can correspond to the described “signal transmission means”. Further, the switching unit 40 may correspond to “power line switching means” described in the claims.

  Next, manufacturing equipment 20D to 20G shown in FIGS. 2 (A) to 2 (D) will be described. In the manufacturing facilities 20D to 20G shown in FIGS. 2 (A) to 2 (D), a power line is connected between the electric / electronic device EE provided in the movable part MV and the control device CN provided in the fixed part FX. A configuration is adopted in which the connection is made by the PL and the signal line SL. That is, in the manufacturing facilities 20A to 20C described above, the two are connected only by the power line PL. However, in the manufacturing facilities 20D to 20G, the signal line SL is added to connect the two. The power line PL and the signal line SL are also accommodated in, for example, a caterpillar type or a bellows-shaped cable bear.

  That is, in the manufacturing facility 20D shown in FIG. 2 (A), the transmitting unit 30Ds electrically connected to the control device CN is connected to the fixed unit FX, and the receiving unit 30Dr electrically connected to the electric / electronic device EE. Are respectively provided in the movable part MV, and the two are connected by one power line PL and one signal line SL. The transmission unit 30Ds and the reception unit 30Dr constitute a signal transmission device 30D as a pair, and are output from the control device CN to the electric / electronic device EE, for example, as in the signal transmission device 30A described above. Predetermined control signals D1 to Dn and the same signal are spread by different spreading codes and superimposed on the power signal flowing through the power line PL, and also transmitted to the signal line SL. This function will also be described in detail later with reference to FIGS. The configuration shown in FIG. 2A can correspond to claim 6 described in the claims. The signal transmission device 30D can also correspond to a “signal transmission unit” recited in the claims.

  As a result, like the above-described manufacturing facility 20A (FIG. 1A), one signal line SL is physically divided into two or more channels. A transmission error by the channel LSch1 can be recovered by a transmission signal by another logical channel LSch2 of the signal line SL. Therefore, since not only the power line PL but also the signal line SL can be provided with a plurality of logical channels LSch, the logical channel LPch by the power line PL and the logical channel LSch by the signal line SL are used together, and these logical channels LPch, Redundancy can be further increased by sending a signal in which the same signals as the predetermined control signals D1 to Dn are spread to the LSch using different spreading codes. Therefore, the occurrence of a communication error can be prevented almost completely.

  Further, like the signal transmission device 30E of the manufacturing facility 20E shown in FIG. 2B, the transmission unit 30Es electrically connected to the control device CN and the reception unit electrically connected to the electric / electronic device EE. A configuration in which 30 Er is connected by one power line PL and a plurality of signal lines SL may be adopted. Thus, as will be described later, since the same signals as the control signals D1 to Dn can be sent to the plurality of signal lines SL, the same signal is sent to the physical channel PSch by the plurality of signal lines SL, so that A simple transmission line can be made redundant.

  For example, even if one of the signal lines SL is disconnected and the physical channel PSch1 cannot be used, the control signals D1 to Dn can be sent via the physical channel PSch2 and the like by the remaining signal lines SL. . For this reason, the movement of the movable part MV causes the electric / electronic device EE to move with respect to the fixed part FX. For example, the signal lines SL rub against each other in the cable bear, and some of them are disconnected, thereby causing physical Even if a situation in which the channels PSch1, PSch2, etc. cannot be used occurs, if at least one signal line SL without disconnection remains, the control signals D1-Dn are exchanged via the physical channel PSch3 by the signal line SL. It can be secured. The configuration shown in FIG. 2B can correspond to the invention of claim 6 described in the claims. The signal transmission device 30E can correspond to a “signal transmission unit” recited in the claims.

  Further, like the signal transmission device 30F of the manufacturing facility 20F shown in FIG. 2 (C), the transmission unit 30Fs electrically connected to the control device CN and the reception unit electrically connected to the electric / electronic device EE. A configuration may be adopted in which a plurality of power lines PL and one signal line SL are connected to 30 Fr. That is, a configuration in which one signal line SL is added to the signal transmission device 30B of the manufacturing facility 20B shown in FIG. Thus, as will be described later, the same signal as the control signals D1 to Dn can be sent to such a signal line SL, so that the physical transmission path can be made redundant by the signal line SL. . The structure shown in FIG. 2C can correspond to the invention of claim 6 described in the claims. The signal transmission device 30F may correspond to a “signal transmission unit” recited in the claims.

  Furthermore, like the signal transmission device 30G of the manufacturing facility 20G shown in FIG. 2D, the transmission unit 30Gs electrically connected to the control device CN and the reception electrically connected to the electrical / electronic device EE. A configuration in which a plurality of power lines PL and a plurality of signal lines SL are connected to the unit 30Gr may be employed. That is, a configuration is adopted in which the signal transmission device 30E of the manufacturing facility 20E shown in FIG. 2B and the signal transmission device 30F of the manufacturing facility 20F shown in FIG. 2C are combined. For this reason, as will be described later, since the same signals as the control signals D1 to Dn can be sent to the power line PL and the signal line SL, a physical transmission path is established by the power line PL and the signal line SL. Further, a redundant configuration can be achieved. The structure shown in FIG. 2D can correspond to the invention of claim 6 described in the claims. Further, the signal transmission device 30G can correspond to a “signal transmission unit” recited in the claims.

  Accordingly, in any of the manufacturing equipment 20E shown in FIG. 2 (B), the manufacturing equipment 20F shown in FIG. 2 (C), and the manufacturing equipment 20G shown in FIG. By using together with the logical channel LSch by the line SL, and transmitting the same signal as the predetermined control signals D1 to Dn to the logical channels LPch and LSch by spreading codes different from each other, more redundancy is achieved. Can be increased. Therefore, the occurrence of a communication error can be prevented almost completely.

  Next, manufacturing equipment 20H to 20J shown in FIGS. 3 (A) to 3 (C) will be described. These manufacturing facilities 20H to 20J are the switching units for the plurality of power lines PL and the plurality of signal lines SL in the manufacturing facilities 20E to 20G described with reference to FIGS. 2 (B) to 2 (D). 40 can be switched.

  That is, in the signal transmission device 30H of the manufacturing facility 20H shown in FIG. 3A, the transmission unit 30Hs electrically connected to the control device CN and the reception unit 30Hr electrically connected to the electric / electronic device EE Are connected by a single power line PL and a plurality of signal lines SL, and the plurality of signal lines SL can be electrically switched by the switching unit 40. The switching unit 40 may correspond to “signal line switching means” recited in the claims.

  For example, as shown in FIG. 5 (A), the switching unit 40 includes a multipolar selector switch 40A provided in the transmission unit 30Hs and operable from the outside. For example, the output line of the transmitter 30Hs is connected to the input side of the changeover switch 40A, and the active signal line SL and the standby signal line SL 'are connected to the output side of the changeover switch 40A. As a result, when the active signal line SL is disconnected (the signal line SL with a cross on the left side of FIG. 5 (A)), for example, the maintenance operator operates the changeover switch 40A to perform the changeover. Since the circuit by the switch 40A can be switched from the left side to the right side shown in FIG. 5A, the transmission line connecting the transmission unit 30Hs and the reception unit 30Hr can be easily switched to the standby signal line SL ′. it can. Thus, the changeover switch 40A facilitates the maintenance work when the signal line SL is disconnected, so that the recovery time from the disconnection failure can be shortened.

  Further, as shown in FIG. 5B, the switching unit 40 may be configured with a switching connector 40B in the middle of the signal line SL. For example, the output line of the transmitter 30Hs is connected to the plug side, and the active signal line SL and the standby signal line SL 'are connected to the receptor side. As a result, when the active signal line SL is disconnected (the signal line SL with a cross on the left side of FIG. 5B), for example, a maintenance worker plugs the switching connector 40B into the signal line SL ′. By switching to the connected receptor, the circuit by the switching connector 40B can be switched from the left side to the right side shown in FIG. Thus, in the case of the switching connector 40B, since the switching location is not selected as long as it is in the middle of the signal line SL, the degree of freedom regarding the position where the switching unit 40 is provided can be increased. Further, as in the case of the changeover switch 40A, the maintenance work when the signal line SL is disconnected can be facilitated, and the recovery time from the disconnection failure can be shortened.

  Further, as shown in FIG. 5C, the switching unit 40 may be configured by a switching short pin 40C provided on the circuit board of the transmission unit 30Hs. For example, the transmission unit 30Hs is connected to the center side of the switching short pin 40C, and the active signal line SL and the standby signal line SL 'are connected to both sides thereof. As a result, when the working signal line SL is disconnected (the signal line SL with a cross on the left side of FIG. 5C), for example, a maintenance worker connects the short bar of the switching short pin 40C to the signal line SL. By switching from the side to the signal line SL ′ side, the circuit by the switching short pin 40C can be switched from the left side to the right side shown in FIG. As described above, in the case of the switching short pin 40C, the switching unit 40 can be provided on the circuit board of the transmission unit 30Hs, so that the configuration can be made more compact than in the case of the switching switch 40A and the switching connector 40B. . Further, as in the case of the changeover switch 40A, the maintenance work when the signal line SL is disconnected can be facilitated, and the recovery time from the disconnection failure can be shortened.

  The changeover switch 40A, the changeover connector 40B, and the changeover short pin 40C described in FIGS. 5A to 5C can also be used as a switching means from the active power line PL to the standby power line PL ′. Can be used. In this case, the switching unit 40 may correspond to “power line switching means” described in the claims. Further, in the changeover switch 40A, the changeover connector 40B, and the changeover short pin 40C shown in FIGS. 5A to 5C, a circuit for switching the power line PL and a circuit for switching the signal line SL are provided for each one circuit. However, the present invention is not limited to this, and a configuration in which a plurality of both circuits are provided may be employed, or a configuration in which only one circuit is provided may be employed.

  The transmission unit 30Hs and the reception unit 30Hr illustrated in FIG. 3A include such a switching unit 40 and, as will be described later with reference to FIGS. The same signal as the control signals D1 to Dn can be superimposed on the signal line SL ′. Thereby, when the signal line SL used as the working system is disconnected, the switching unit 40 can easily switch to the standby signal line SL '. Therefore, since the maintenance work is facilitated, the recovery time from the disconnection failure can be shortened. The configuration shown in FIG. 3A can correspond to the inventions of claims 7 and 9 described in the claims. Further, the signal transmission device 30H can correspond to a “signal transmission unit” recited in the claims.

  In addition, the transmission unit 30Is and the reception unit 30Ir constituting the manufacturing facility 20I shown in FIG. 3B are similarly provided with such a switching unit 40 and, as will be described later, only with a plurality of power lines PL. In addition, the same signal as the control signals D1 to Dn can be superimposed on such a power line PL ′. Thereby, when the power line PL used as the active system is disconnected, the switching unit 40 can easily switch to the standby power line PL ′. Therefore, since the maintenance work is facilitated, the recovery time from the disconnection failure can be shortened. The configuration shown in FIG. 3B can correspond to the inventions of claims 3 and 5 described in the claims. The signal transmission device 30I may correspond to a “signal transmission unit” recited in the claims.

  Further, the transmission unit 30Js and the reception unit 30Jr constituting the manufacturing facility 20J shown in FIG. 3C are similarly provided with such a switching unit 40, and a plurality of power lines PL and signals as will be described later. The same signals as the control signals D1 to Dn can be superimposed not only on the line SL but also on the power line PL ′ and the signal line SL ′. As a result, both the power line PL and the signal line SL are switched from the active power line PL and the signal line SL to the standby power line PL ′ and the signal line SL ′ by the switching unit 40. Therefore, since the maintenance work is further facilitated, the recovery time from the disconnection failure can be shortened. The configuration shown in FIG. 3 (C) can correspond to the inventions of claims 3, 5, 7, and 9, respectively. The signal transmission device 30J may correspond to a “signal transmission unit” recited in the claims.

  4A and 4B, a plurality of signal lines SL are provided between the transmission unit 30Ks and the reception unit 30Kr and between the transmission unit 30Ls and the reception unit 30Lr. You may do it. In these cases, as in the manufacturing facility 20B and the manufacturing facility 20C described with reference to FIGS. 1B and 1C, as described later with reference to FIGS. Since the same signal as the control signals D1 to Dn can be sent to the signal line SL, the physical transmission path can be made redundant by flowing the same signal to these physical channels PSch.

  For example, even if one of the signal lines SL is disconnected and the physical channel PSch1 cannot be used, the control signals D1 to Dn can be sent via the physical channel PSch2 and the like by the remaining signal lines SL. . For this reason, the movement of the movable part MV causes the electric / electronic device EE to move with respect to the fixed part FX. For example, the signal lines SL rub against each other in the cable bear, and some of them are disconnected, thereby causing physical Even if a situation in which the channels PSch1, PSch2, etc. cannot be used occurs, if at least one signal line SL without disconnection remains, the control signals D1-Dn are exchanged via the physical channel PSch3 by the signal line SL. It can be secured. The structure shown in FIG. 4A can correspond to the invention of claim 8 described in the claims. Further, the signal transmission device 30K may correspond to “signal transmission means” recited in the claims.

  Further, like the signal transmission device 30L of the manufacturing facility 20L shown in FIG. 4B, another signal line SL ′ capable of supplying power from the fixed portion FX to the electric / electronic device EE is provided, and the signal line SL May be provided with a switching unit 40 that can be switched to another signal line SL ′. Thus, as will be described later with reference to FIGS. 8 to 11, the same signals as the control signals D1 to Dn can be transmitted not only to the plurality of signal lines SL but also to such signal lines SL ′. Thus, the switching unit 40 can easily switch the transmission / reception of the control signals D1 to Dn from the disconnected signal line SL to the other signal line SL ′. Therefore, since the maintenance work is facilitated, it is possible to shorten the recovery time from the disconnection failure. The configuration shown in FIG. 4 (B) can correspond to the invention of claim 9 described in the claims, and the signal transmission device 30L includes the “signal transmission” described in the claims. Further, the switching unit 40 can correspond to a “signal line switching unit” recited in the claims.

  Next, the configuration of the signal transmission devices 30A to 30L will be described with reference to FIGS. The configurations of the signal transmission devices 30A to 30L are mainly classified into the following transmission methods (1) to (3). Hereinafter, each transmission method will be described in order.

(1) Physically forming multiple logical channels for one transmission line (Figs. 6 and 7)
(2) Physically forming multiple logical channels for multiple transmission lines (Figs. 8 and 9)
(3) A system in which one logical channel is physically formed for each of a plurality of transmission lines (FIGS. 10 and 11).

  As shown in FIGS. 6 and 7, in the method (1), a plurality of logical channels are physically formed for one transmission line. For example, the configuration of the signal transmission device 30A by the manufacturing facility 20A described with reference to FIG. 1 (A) corresponds to the method (1). Therefore, here, the configuration of the transmission unit 30As (FIG. 6) and the reception unit 30Ar (FIG. 7) constituting the signal transmission device 30A will be described as an example.

  As shown in FIG. 6, the transmission unit 30As is mainly composed of spreading units 30As1 to 30Asm (m is the number of logical channels) provided corresponding to the number of logical channels and an addition unit 33. Data D1 to Dn input to the ports Pi1 to Pin are multiplexed by code division multiple access corresponding to the number of logical channels and output to one power line PL via the output port Po1.

  That is, the spreading unit 30As1 of the transmitting unit 30As is a spreading code generator capable of generating spreading codes 1a to na set differently for each of the data D1 to Dn (input signal, transmission signal) input from the control device CN. SC1a to SCna, and further includes a multiplying unit 32 that can multiply the data D1 to Dn input from the controller CN and the spread codes 1a to na output from the spread code generators SC1a to SCna, respectively. Thereby, for example, the data D1 to Dn input from the control device CN are multiplied by the spread codes 1a to na, respectively. That is, the data D1 to Dn input from the control device CN are spread by the corresponding spreading codes 1a to na. The spreading codes 1a to na can correspond to “predetermined spreading codes” recited in the claims.

  Similarly, the spreading unit 30As2 also includes spreading code generators SC1b to SCnb capable of generating spreading codes 1b to nb and a multiplying unit 32, so that the data D1 to Dn (same data as) output from the control device CN. Are spread by corresponding spreading codes 1b to nb. A spreading process for the same data as the data D1 to Dn is performed for the number m-1 of logical channels. Then, all the signals diffused in this way are input to the adder 33, so that they are superimposed on the power signal flowing through the power line PL and output to the power line PL. The spreading codes 1b to nb may correspond to “other spreading codes” recited in the claims.

  On the other hand, as shown in FIG. 7, the receiving unit 30Ar is mainly composed of a distribution unit 35 and despreading units 30Ar1 to 30Arm (m is the number of logical channels) provided corresponding to the number of logical channels. After the input signal superimposed on the power signal input from the input port Pi1 is distributed corresponding to the number of logical channels, the signals are separated by despreading corresponding to the logical channels, and the output ports Po1 to Pon are connected. And has a function of outputting data D1 ′ to Dn ′.

  That is, the despreading unit 30Ar1 of the receiving unit 30Ar includes spreading code generators SC1a to SCna that generate the spreading codes 1a to na that are the same as the spreading codes 1a to na that can be generated by the spreading unit 30As1 of the transmitting unit 30As. 35 is provided with a multiplying unit 36 that can multiply the signal distributed and input by the signal 35 and the spread codes 1a to na output from the spread code generators SC1a to SCna, respectively, and further despread the signal for one bit of data. A decoding unit 37 is provided that can integrate one bit period of each bit as one period. Thereby, for example, the signal input from the power line PL is distributed by the distribution unit 35, multiplied by the spread codes 1 a to na, and then input to the decoding unit 37. That is, the signal distributed by the distributing unit 35 is despread by the corresponding spreading codes 1a to na, and then decoded by the decoding unit 37 in units of one bit for each data D1 to Dn. The spreading codes 1a to na can correspond to “predetermined spreading codes” recited in the claims.

  Similarly, the despreading unit 30Ar2 also includes spreading code generators SC1b to SCnb that can generate spreading codes 1b to nb, a multiplying unit 36, and a decoding unit 37. The data is despread by the spreading codes 1b to nb, and is decoded in units of 1 bit for each data D1 to Dn. The despreading process and the decoding process for the same data as the data D1 to Dn are performed for the number m-1 of logical channels. Since the decoding process by the decoding unit 37 is performed for each logical channel, the same data D <b> 1 to the same data D <b> 1 for each logical channel when no code error or the like occurs during transmission through the power line PL. Dn will be decoded. The spreading codes 1b to nb may correspond to “other spreading codes” recited in the claims.

  That is, the signal transmission device 30A according to the present embodiment superimposes the transmission signal and the same signal on the power signal of the power line PL by code division multiple access, so that no communication error or the like occurs during transmission. In this case, the same data D1 to Dn decoded in the receiving unit 30Ar are obtained in duplicate. Therefore, in the receiving unit 30Ar, by providing the determination unit 39, one of the data D1 to Dn obtained in duplicate according to a predetermined determination rule is selected, or among the decoded data D1 to Dn Select the correct one except for the wrong one.

  As a determination rule by the determination unit 39, for example, when the number of logical channels is an odd number, there is a majority voting method that selects the output data D1 ′ to Dn ′ as the output data D1 ′ to Dn ′ and excludes the smaller one as the output data D1 ′ to Dn ′. is there. This is because even if a code error occurs in the middle of a transmission path due to external noise or the like, the probability of error in the same pattern is very small, but if the decoded data is the same pattern, there is a possibility that they will not have a code error. It is based on being very expensive.

  Further, as a determination rule by the determination unit 39, there is one that is selected based on the type of transmission path. For example, when the power line PL is a transmission line, it can be affected by noise due to a power signal, while when the signal line SL is a transmission line, there is a low possibility of being affected by such noise. In addition, in both the power line PL and the signal line SL, the possibility of being affected by noise is lower in the case of a shielded cable than in the case of a cable without a shield. Furthermore, when the signal line SL is an optical fiber cable, it is less likely to be affected by noise than in the case of a metallic cable. In the selection based on the type of the transmission path, the data D1 to Dn by the signal that has passed through the transmission path that is less susceptible to the influence of external noise or the like based on such a judgment criterion is preferentially output data D1 ′ to Dn. Select as'.

  Furthermore, there is a first-come-first-served basis method in which data D1 to Dn input to the determination unit 39 the fastest are selected as output data D1 'to Dn'. There is an advantage in that the circuit configuration can be realized relatively easily.

  As described above, in the transmission unit 30As and the reception unit 30Ar, the same signal as the transmission signal is superimposed on the power signal of one power line PL. Therefore, one power line PL is physically divided into two or more channels. Therefore, the logical transmission path can be made redundant by flowing the same signal through these logical channels. For this reason, for example, even if a transmission error occurs in signal transmission through the logical channel LPch1, the code division multiple access of the logical channel LPch2 is performed by a spreading code different from the spreading code used in the code division multiple access of the logical channel LPch1. Therefore, there is a low possibility that a transmission error will occur in signal transmission using the logical channel LPch2. For this reason, a transmission error caused by the logical channel LPch1 can be recovered by a transmission signal via the other logical channel LPch2. Accordingly, since error-free signal transmission can be performed without performing error correction processing due to the transmission error, communication errors can be almost completely prevented.

  The method (1) is not limited to the signal transmission device 30A described above as long as one or more power lines PL exist as a transmission path between the transmission unit and the reception unit. 1B, signal transmission device 30C shown in FIG. 1C, signal transmission device 30D shown in FIG. 2A, signal transmission device 30E shown in FIG. 2 (C), signal transmission device 30G shown in FIG. 2 (D), signal transmission device 30H shown in FIG. 3 (A), signal transmission device 30I shown in FIG. 3 (B), FIG. The present invention can also be applied to the signal transmission device 30J shown in C).

  As shown in FIGS. 8 and 9, in the method (2), a plurality of logical channels are physically formed for a plurality of transmission lines. For example, the configuration of the signal transmission device 30B by the manufacturing facility 20B described with reference to FIG. 1B corresponds to the method (2). Therefore, here, the configuration of the transmission unit 30Bs (FIG. 8) and the reception unit 30Br (FIG. 9) constituting the signal transmission device 30B will be described as an example.

  As shown in FIG. 8, the transmission unit 30Bs is a modification of the transmission unit 30As described above. That is, the transmission unit 30As shown in FIG. 6 employs a method in which each logical channel is superimposed on a power signal flowing through one power line PL. However, in this transmission unit 30Bs, the output port Po1 is set for each logical channel. A method of sending to a separate power line PL or signal line SL via Pon is adopted. The other configurations are substantially the same as those of the transmission unit 30As described above, and the spreading units 30Br1 to 30Brm (m is the number of logical channels) correspond to the spreading units 30Ar1 to 30Brm shown in FIG. 6, respectively. Omitted.

  As shown in FIG. 9, the receiving unit 30Br is also a modification of the above-described receiving unit 30Ar. In the case of the receiving unit 30Br, the input signal is input from the plurality of power lines PL or signal lines SL through the input ports Pi1 to Pin instead of from one power line PL or signal line SL. Different from the part 30Ar. Other configurations are substantially the same as those of the receiving unit 30Ar described above, and the despreading units 30Bs1 to 30Bsm (m is the number of logical channels) correspond to the despreading units 30As1 to 30Bsm shown in FIG. Description is omitted.

  Thereby, in the transmission unit 30Bs and the reception unit 30Br, the same signal as the transmission signal is superimposed on the power signal of the plurality of power lines PL, or the same signal as the transmission signal is transmitted to the plurality of signal lines SL. The transmission path can be made redundant. For this reason, for example, even if one of the plurality of power lines PL is disconnected, a transmission signal can be sent through the remaining power lines PL. Therefore, when the electric / electronic device EE moves with respect to the fixed portion FX due to the movement of the movable portion MV, for example, there is a situation where the power lines PL are rubbed in the cable bear CB and some of them are disconnected. Even if it occurs, if at least one unbroken power line PL remains, it is possible to ensure supply of power and transmission / reception of electric signals through the power line PL. The same applies to the signal line SL.

  The method (2) is limited to the signal transmission device 30B described above as long as there are a plurality of power lines PL or a plurality of signal lines SL as a transmission path between the transmission unit and the reception unit. For example, the signal transmission device 30C shown in FIG. 1 (C), the signal transmission device 30E shown in FIG. 2 (B), the signal transmission device 30F shown in FIG. 2 (C), and the signal transmission device 30F shown in FIG. Signal transmission device 30G, signal transmission device 30H shown in FIG. 3 (A), signal transmission device 30I shown in FIG. 3 (B), signal transmission device 30J shown in FIG. 3 (C), signal transmission shown in FIG. 4 (A). The present invention can also be applied to the device 30K and the signal transmission device 30L shown in FIG.

  As shown in FIGS. 10 and 11, in the method (3), one logical channel is physically formed for each of a plurality of transmission lines. For example, the configuration of the signal transmission device 30C by the manufacturing facility 20C described with reference to FIG. 1C corresponds to the method (3). Therefore, here, the configuration of the transmission unit 30Cs (FIG. 10) and the reception unit 30Cr (FIG. 11) constituting the signal transmission device 30C will be described as an example.

  As illustrated in FIG. 10, the transmission unit 30Cs is a modification of the transmission unit 30Bs described above. In other words, the transmission unit 30Bs shown in FIG. 8 employs a method of sending each logical channel to a separate power line PL or signal line SL via the output ports Po1 to Pon. A system is employed in which a logical channel is sent to a separate power line PL or signal line SL via a plurality of output ports Po1 to Pon. Other configurations are substantially the same as those of the transmission unit 30As and the transmission unit 30Bs described above, and the diffusion unit 30Cr1 corresponds to the diffusion unit 30Ar1 shown in FIG. 6 and the diffusion unit 30Br1 shown in FIG. To do.

  Further, as shown in FIG. 11, the receiving unit 30Cr is a modification of the above-described receiving unit 30Br. In the case of the receiving unit 30Cr, since the input signals input from the plurality of power lines PL or signal lines SL through the input ports Pi1 to Pin are for one logical channel, the spreading code used for despreading is reversed. The difference between the spreading units 30Cs1 to 30Csm is the same as that of the receiving unit 30Br shown in FIG. Other configurations are substantially the same as those of the receiving unit 30Ar and the receiving unit 30Br described above, and thus description thereof is omitted.

  Thereby, in the transmission unit 30Cs and the reception unit 30Cr, the same signal as the transmission signal is superimposed on the power signal of the plurality of power lines PL, or the same signal as the transmission signal is transmitted to the plurality of signal lines SL. A simple transmission line can be made redundant. For this reason, for example, even if one of the plurality of power lines PL and signal lines SL is disconnected, a transmission signal can be sent via the remaining power lines PL and signal lines SL. Therefore, when the electric / electronic device EE moves with respect to the fixed portion FX due to the movement of the movable portion MV, for example, there is a situation where the power lines PL are rubbed in the cable bear CB and some of them are disconnected. Even if it occurs, if at least one unbroken power line PL remains, it is possible to ensure supply of power and transmission / reception of electric signals through the power line PL. The same applies to the signal line SL.

  Further, when a standby power line PL ′ and a signal line SL ′ that are not normally used exist between the transmission unit 30Cs and the reception unit 30Cr, for example, as shown in FIGS. 5 (A) to (C). By providing the switching unit 40 (the changeover switch 40A, the changeover connector 40B, and the switching short pin 40C) in the transmission unit 30Cs and the reception unit 30Cr, the active power line PL and signal line SL to the standby power line PL ′ and signal line SL. Can be easily switched to. Thereby, in order to facilitate the maintenance work when the power line PL or the signal line SL is disconnected, the recovery time from the disconnection failure can be shortened, and the operating rate of the manufacturing facility 20C due to the disconnection of the power line PL or the signal line SL can be reduced. The decrease can be suppressed. The signal lines SL and SL 'are shown in FIG.

  The method (3) is limited to the signal transmission device 30C described above as long as there are a plurality of power lines PL or a plurality of signal lines SL as a transmission path between the transmission unit and the reception unit. For example, the signal transmission device 30B shown in FIG. 1B, the signal transmission device 30E shown in FIG. 2B, the signal transmission device 30F shown in FIG. 2C, and the signal transmission device 30F shown in FIG. Signal transmission device 30G, signal transmission device 30H shown in FIG. 3 (A), signal transmission device 30I shown in FIG. 3 (B), signal transmission device 30J shown in FIG. 3 (C), signal transmission shown in FIG. 4 (A). The present invention can also be applied to the device 30K and the signal transmission device 30L shown in FIG.

  The technique relating to spreading and despreading of data D1 to Dn by code division multiple access is described in detail in the above-mentioned Patent Document 2 (Japanese Patent Laid-Open No. 2001-144653; paragraph numbers 0042 to 0044, FIG. 2). Please refer to the description.

Next, application examples of the manufacturing facility according to the present embodiment described so far will be described as a first embodiment to a third embodiment. First, an example of a printed circuit board inspection apparatus will be described with reference to FIG.
[First Embodiment]

  As shown in FIG. 12, the printed circuit board inspection device 60 mainly includes a control device 61, a table device 62, and a camera device 65. In this printed circuit board inspection device 60, image data obtained by photographing a wiring pattern of a printed circuit board (hereinafter referred to as “work Wa”) placed on the table device 62 with the camera device 65 is transferred to the control device 61. By outputting, predetermined image processing is performed by the control device 61. Thereby, since disconnection and a short circuit of a wiring pattern can be detected, the quality of the workpiece Wa can be inspected.

  Therefore, in the printed circuit board inspection device 60, the control device 61 and the table device 62, and the control device 61 and the camera device 65 are connected by the power line PL and the signal line SL accommodated in the cable bear CB, respectively. As a result, a control signal can be sent from the control device 61 to the table device 62 and the camera device 65, and image data and the like can be output from the camera device 65 to the control device 61. The control device 61 corresponds to the control device CN described above, the table device 62 and the camera device 65 correspond to the movable part MV, and the table control unit 63 and the camera control unit 66 correspond to the electric / electronic device EE. To do. Further, the floor surface FL in the factory premises where the printed circuit board inspection apparatus 60 is installed corresponds to the fixed portion FX.

  As shown in FIG. 12, the control device 61 controls, for example, the table device 62 and the camera device 65, and calculates and processes image data and the like output from the camera device 65. The transmission / reception units 61a and 61b are mainly configured. The transmission / reception unit 61a is used to exchange control signals and the like between the control device 61 and the table device 62, and the transmission / reception unit 61b transmits control signals and the like between the control device 61 and the camera device 65. Used to communicate.

  The table device 62 includes a table control unit 63, an inspection table 64, and the like. For example, the table control unit 63 itself has two axes of X and Z under the control of the table control unit 63 provided with the inspection table 64 on the upper side. It is configured to be movable. The inspection table 64 is provided with positioning pins 64a, thereby enabling positioning of the workpiece Wa to be placed. This biaxial movement is made possible by the table X-axis direction guide 63x and a Z-axis direction guide (not shown). In this table device 62, for example, the workpiece Wa is moved forward (X-axis direction) in order to place the workpiece Wa on the inspection table 64 (reference numerals 63 ′ and 64 ′ by broken lines in FIG. 12), and the placement of the workpiece Wa is illustrated. When an approximate sensor detects it, it moves to the rear (X-axis direction) inspection position, and then rises in the Z-axis direction to the height at which the inspection is performed.

  Therefore, conventionally, between the control device 61 and the table device 62, X and Z control signals of the table control unit 63, overrun sensor signals of the table control unit 63, sensor signals for detecting the placement of the workpiece Wa, A plurality of signal lines SL for transmitting each signal such as a suction on / off control signal of the workpiece Wa and one power line PL for supplying power to the table control unit 63 are required. However, as described in the “Background Art” section, when a plurality of such signal lines SL and power lines PL are mixed and accommodated in the cable bear CB, these cables are rubbed against each other in the cable bear CB and disconnected. May occur.

  Therefore, in the first embodiment, the transmission unit 30Ds and the reception unit 30Dr described with reference to FIG. 2A are used as the transmission / reception unit 61a as the control device 61, and the transmission unit 30Ds and the reception unit 30Dr are used as the transmission / reception unit 63a. By providing the table control unit 63 and applying the method (1) by the signal transmission device 30A according to FIGS. 6 and 7 described above, one power line PL and one signal line SL are used. It is possible to transmit control signals and the like.

  As a result, the same signal as each of these control signals is sent not only to the power line PL but also to the signal line SL, so that the physical transmission path is made redundant. For this reason, the table control unit 63 (electrical / electronic device EE) moves with respect to the floor surface FL (fixed part FX) by the movement of the table device 62 (movable part MV), so that the power line PL and the signal are transmitted in the cable bear CB. Even if a situation occurs in which the signal line SL is broken due to rubbing with the line SL, the supply of power and the transmission / reception of each control signal should be ensured through the power line PL as long as the unbroken power line PL remains. Can do.

  Further, these control signals and the like are transmitted and received, for example, by code division multiple access (for example, one logical channel LPch1) by spreading codes 1a to na generated from spreading code generators SC1a to SCna and spreading code generators SC1b to SC1b. And code division multiple access (for example, another logical channel LPch2) by spreading codes 1b to nb generated from SCnb or the like. As a result, since one power line PL can be physically divided into two or more channels, a logical transmission line can be made redundant by flowing the same signal through these logical channels LPch. .

  For this reason, even if a transmission error occurs in signal transmission through one logical channel LPch1, the code division multiple of another logical channel LPch2 is different from the spread code used in the code division multiple access of the one logical channel LPch1. Since the connection is made, there is a low possibility that a transmission error will occur in the signal transmission by the other logical channel LPch2. Thereby, it is possible to recover a transmission error by one logical channel LPch1 by a transmission signal by another logical channel LPch2. Accordingly, error-free signal transmission can be performed without performing error correction processing due to the transmission error, and the occurrence of a communication error can be almost completely prevented. Therefore, between the control device 61 and the table control unit 63, It is possible to suppress disconnection and error of each control signal. Therefore, even if very high-speed real-time performance is required, the request can be met.

  Also, for example, when increasing the number of control signals between the control device 61 and the table control unit 63, spreading of control signals to increase spreading codes that are not used in code division multiple access of existing control signals. By assigning to a code, it can be easily handled. Therefore, it is possible to reduce the maintenance man-hour for the addition of the control signal between the control device 61 and the table control unit 63.

  Further, since the same control signal is spread by spreading codes 1b to nb different from the spreading codes 1a to na for spreading these control signals to perform code division multiple access, the control signal and the same control signal are the same. Even when superimposed on the power signal, these signals can be individually despread. For this reason, even if these control signals are the same signals, they can be separated by a relatively simple configuration. Further, for example, when the number of the same control signals superimposed on the same power signal is an odd number and some of them have transmission errors, recovery can be performed by the majority method. Therefore, with a relatively simple configuration, it is possible to suppress the interruption of the control signal and its error, and to reduce the maintenance man-hour for the addition of the control signal.

  On the other hand, the camera device 65 includes a camera control unit 66, a camera body 68, a zoom lens 68a, and the like. This camera device 65 is also configured so that the camera control unit 66 can move in three axes of X, Y, and Z under the control of the camera control unit 66 (reference numerals 68 ′ and 68 ″ by broken lines shown in FIG. 12). The movement of these three axes is made possible by the camera X-axis direction guide 66x, the camera Y-axis direction guide 66y, and the camera Z-axis direction guide 66z In this camera device 65, for example, by a camera body 68 and its zoom lens 68a. After the alignment mark printed on the workpiece Wa is photographed and the inspection data is corrected, the camera device 65 is moved to a predetermined inspection position, so that the wiring pattern of the workpiece Wa can be photographed. Image data obtained by photographing is output from the camera device 65 to the control device 61 as inspection data.

  For this reason, conventionally, between the control device 61 and the camera device 65, an XYZ control signal for controlling the camera device 65, an overrun sensor signal for the camera device 65, an alignment mark, image data of an inspection result, camera brightness, etc. This requires several signal lines SL for transmitting data and the like as the inspection conditions, and one power line PL for supplying power to the camera control unit 66. However, as described in the “Background Art” section, when such a plurality of signal lines SL and power lines PL are mixed and accommodated in the cable bear CB, these cables are rubbed against each other in the cable bear CB and disconnected. May occur.

  Therefore, in the first embodiment, the transmission unit 30Es and the reception unit 30Er described with reference to FIG. 2B are used as the transmission / reception unit 61a as the control device 61, and the transmission unit 30Es and the reception unit 30Er are used as the transmission / reception unit 63a. By providing the camera control unit 66 and applying the method (2) by the signal transmission device 30B according to FIGS. 8 and 9 described above, each of the power line PL and the plurality of signal lines SL is used. It is possible to transmit control signals and the like. In the case of the camera device 65, since the moving range is larger and the moving speed is faster than the table device 62, it is expected that the disconnection probability of the signal line SL is high. Therefore, a plurality of signal lines SL are provided. Therefore, it is possible to increase the redundancy and prepare for easy maintenance in case of disconnection.

  As a result, the same signals as these control signals are transmitted not only to the power line PL but also to the plurality of signal lines SL, so that the physical transmission path is made more redundant. For this reason, the camera control unit 66 (electrical / electronic device EE) moves relative to the floor surface FL (fixed part FX) by the movement of the camera device 65 (movable part MV), so that a plurality of power lines PL and a plurality of power lines PL are connected in the cable bear CB. Even if the signal line SL is rubbed and a part or all of the signal line SL is disconnected, if the signal line SL or the power line PL without disconnection remains, the signal line SL or the power line PL is connected. Thus, it is possible to ensure the supply of power and the transmission and reception of each control signal.

  Further, the configuration of the transmission / reception unit 61b of the control device 61 and the transmission / reception unit 66a of the camera control unit 66 are substantially the same as the configuration of the transmission / reception unit 61a of the control device 61 and the transmission / reception unit 63a of the table control unit 63. As with the device 62, the logical transmission path can be made redundant, the occurrence of communication errors can be almost completely prevented, the request can be met even if very high-speed real-time performance is required, and the control device 61 Effects such as reduction of maintenance man-hours for the addition of control signals to and from the camera control unit 66, suppression of control signal disconnection and error, and reduction of maintenance man-hours for the addition of control signals, can be achieved with a relatively simple configuration. can get.

  The power lines PL accommodated in the cable bear CB are, for example, a 600V vinyl insulated wire (JIS C 3307), a 600V vinyl insulated vinyl sheath cable (JIS C 3342), a 600V cross-linked polyethylene insulated vinyl sheath cable (JIS C 3605), 600V. Two types (heat-resistant) vinyl insulated wires (JIS C 3317), outdoor vinyl insulated wires (JIS C 3340, 3370), lead-in vinyl insulated wires (JIS C 3341), and the like. Examples of the signal line SL include a control vinyl insulated vinyl sheath cable (JIS C 3401), a control crosslinked polyethylene insulated vinyl sheath cable (JIS C 3401), and the like.

Next, an example of a printed circuit board plating apparatus as shown in FIG. 13 will be described as an application example of the manufacturing equipment according to the present embodiment.
[Second Embodiment]

  As shown in FIG. 13, the plating apparatus 70 mainly includes a control device 71, a hanger device 72, and a plating tank group 79. In this plating apparatus 70, a printed circuit board (hereinafter referred to as “work Wb”) hung on the hook 77 of the hanger apparatus 72 is transported and sequentially put into the plating tanks 79 </ b> A to 79 </ b> D of the plating tank group 79, for example. The manufacturing line for performing copper plating on the workpiece Wb is configured.

  For example, when the workpiece Wb is a printed circuit board, the epoxy smear in the through hole generated at the time of drilling is completely removed with a chemical treatment solution such as potassium permanganate, and then an alkaline solution such as an aqueous sodium hydroxide solution, an aqueous hydrochloric acid solution The dirt adhering to the printed circuit board is removed by pretreatment with acid solution (solution Wx) and the like, and electroless copper plating is thinned to ensure electrical conduction between the through hole and the substrate surface. Further, a series of copper plating processes are completed by performing a thick plating process by electrolytic copper plating. Thus, in the copper plating process, since it is necessary to put the workpieces Wb into the plating tanks 79A to 79D in order, the plating apparatus 70 suspends the workpieces Wb by the hanger device 72 and controls the motor. The part 73 is configured to be transportable along the X-axis direction guide 73x.

  For this reason, in the plating apparatus 70, the power line PL or signal line bundled between the control device 71 and each motor control unit 73 or between the control device 71 and each cylinder 75 by the cable bear CB ′ of the curtain system. By connecting via SL, a control signal can be sent from the control device 71 to each motor control unit 73 and cylinder 75. The control device 71 corresponds to the control device CN described above, the hanger device 72 corresponds to the movable part MV, and the motor control unit 73 corresponds to the electric / electronic device EE. Further, the floor surface FL in the factory premises where the present plating apparatus 70 is installed corresponds to the fixed portion FX.

  As shown in FIG. 13, the control device 71 is configured by, for example, a transmission unit 71 a around a microcomputer unit (not shown) so that the hanger device 72 can be driven and controlled. The transmission unit 71 a It is used for exchanging control signals and the like between 71 and the hanger device 72.

  The hanger device 72 includes a motor control unit 73, a cylinder 75, a hook 77, and the like. For example, the motor control unit 73 moves in the X-axis direction by the control of the motor control unit 73 provided with the cylinder 75 in the lower part. It is configured to be possible. This movement of the X axis is made possible by the X axis direction guide 73x. The cylinder 75 attached to the lower side in the gravity direction of the motor control unit 73 includes a cylinder rod 75a that can be extended on the lower side and retractable on the upper side, and a hook 77 that can hook the workpiece Wb on the tip thereof. Is attached.

  As a result, the workpiece Wb hung on the hook 77 can be moved along the X-axis direction guide 73x, and the workpiece Wb is moved in the gravity direction by extension of the cylinder rod 75a, and the workpiece Wb is retracted by the cylinder rod 75a. Since Wb can be moved in the anti-gravity direction, the workpieces Wb can be sequentially put into the plating tanks 79A to 79D arranged below the X-axis direction guide 73x.

  For this reason, conventionally, between the control device 71 and the hanger device 72, a signal line SL for transmitting a start / stop control signal for the motor control unit 73, a start / stop control signal for the cylinder 75, and the like, and power are supplied to them. It was necessary to provide the power lines PL corresponding to the number of the hanger devices 72. However, as described in the “Background Art” section, in the case of such a curtain type cable bear CB ′, the power line PL and the signal line SL having a sufficient length are slackened downward. There is a high possibility of disconnection compared to the method and bellows type cable bear. Further, in the case of the plating apparatus 70, when the signal line SL is disconnected, the hanger apparatus 72 stops, so that the workpiece Wb (printed circuit board) hung on the hook 77 in the meantime is in, for example, the solution Wx in the plating tank 79A. It will be left in a state where it is thrown in or in a state where it is exposed to the air. Then, since the workpiece Wb progresses to plating unexpectedly or oxidation proceeds, the disconnection of the signal line SL is directly connected to the occurrence of such a product defect.

  Therefore, in the second embodiment, the transmission unit 30Gs described with reference to FIG. 2D is provided in the control device 71 as the transmission / reception unit 71a, and the reception unit 30Gr is provided in the motor control unit 73. These control signals and the like can be transmitted through n power lines PL including the system and n signal lines SL corresponding to the number n of the hanger devices 72. That is, the control signal of the motor control unit 73 and the control signal of the cylinder 75 are superimposed on the power signal flowing through the working power line PL and the standby power line PL ′ using code division multiple access and further code-divided into the signal line SL. By transmitting using multiple access, a redundant configuration in which the transmission paths of these control signals are tripled is adopted.

  As a result, the same signal as each of these control signals is sent not only to the power line PL but also to the signal line SL, so that the physical transmission path is made redundant. For this reason, the motor control unit 73 (electric / electronic device EE) is moved with respect to the floor surface FL (fixed part FX) by the movement of the hanger device 72 (movable part MV), and is bundled by the cable bear CB ′. Even if the power line PL and the signal line SL are rubbed and the signal line SL is disconnected, if the power line PL without disconnection remains, power supply and transmission / reception of each control signal are performed via the power line PL. Can be secured.

  Further, these control signals and the like are transmitted and received, for example, by code division multiple access (for example, one logical channel LPch1) by spreading codes 1a to na generated from spreading code generators SC1a to SCna and spreading code generators SC1b to SC1b. And code division multiple access (for example, another logical channel LPch2) by spreading codes 1b to nb generated from SCnb or the like. As a result, since one power line PL can be physically divided into two or more channels, a logical transmission line can be made redundant by flowing the same signal through these logical channels LPch. .

  For this reason, even if a transmission error occurs in signal transmission through one logical channel LPch1, the code division multiple of another logical channel LPch2 is different from the spread code used in the code division multiple access of the one logical channel LPch1. Since the connection is made, there is a low possibility that a transmission error will occur in the signal transmission by the other logical channel LPch2. Thereby, it is possible to recover a transmission error by one logical channel LPch1 by a transmission signal by another logical channel LPch2. Accordingly, error-free signal transmission can be performed without performing error correction processing due to the transmission error, and the occurrence of a communication error can be prevented almost completely. Therefore, between the control device 71 and the motor control unit 73, It is possible to suppress the disconnection and error of each control signal. Therefore, even if the curtain type cable bear CB ′, which is more likely to be disconnected than a caterpillar type or a bellows type cable bear, it is possible to almost completely prevent the occurrence of a communication error due to external noise or disconnection. . In addition, it is possible to prevent the product defect of the workpiece Wa due to the reasons described above.

  For example, when the number of control signals between the control device 71 and the motor control unit 73 is increased, the spreading of the control signal to increase the spreading code that is not used in the code division multiple access of the existing control signal. By assigning to a code, it can be easily handled. Therefore, it is possible to reduce the maintenance man-hour for the increase of the control signal between the control device 71 and the motor control unit 73.

  Further, since the same control signal is spread by spreading codes 1b to nb different from the spreading codes 1a to na for spreading these control signals to perform code division multiple access, the control signal and the same control signal are the same. Even when superimposed on the power signal, these signals can be individually despread. For this reason, even if these control signals are the same signals, they can be separated by a relatively simple configuration. Further, for example, when the number of the same control signals superimposed on the same power signal is an odd number and some of them have transmission errors, recovery can be performed by the majority method. Therefore, with a relatively simple configuration, it is possible to suppress the interruption of the control signal and its error, and to reduce the maintenance man-hour for the addition of the control signal.

  As the power line PL and the signal line SL bundled with the cable bear CB ′, in addition to the electric wires, cables, cords, etc. described in the example of the printed circuit board inspection apparatus 60, in particular, those suitable for the curtain system are vinyl. Examples include a cab tire cable (JIS C 3312), a flexible vinyl cab tire cable (JIS C 3312), a vinyl cab tire cord (JIS C 3322), and a first type natural rubber cab tire cable (JIS C 3327).

As another application example, an example in which the manufacturing facility according to this embodiment is applied to an industrial robot will be described with reference to FIG.
[Third Embodiment]

  As shown in FIG. 14, the industrial robot 80 mainly includes a control device 81 and a robot device 82. In the industrial robot 80, an operation such as moving the work Wc placed on the work table 90 or changing its posture by the hand 87 of the robot device 82, or attaching a processing tool to the hand 87. An operation with a relatively high degree of freedom, such as performing predetermined processing on the workpiece Wc, is possible.

  As shown in FIG. 14, the control device 81 is configured by, for example, a transmission / reception unit 81 a centered on a microcomputer unit (not shown) so that the robot device 82 can be driven and controlled. The transmission / reception unit 81a is used to exchange control signals and the like between the control device 81 and the robot device 82.

  The robot device 82 includes a base 83, a base 83, an arm control unit 84, a support main body 85, an arm 86, a hand 87, and the like that are provided with wheels 83a and are capable of self-propelling. , Configured in the Y-axis direction. Further, the arm 86 and the hand 87 of the robot device 82 are controlled by the arm control unit 84 so as to be movable to an arbitrary position in the three-dimensional space of X, Y, and Z. For this reason, the arm control unit 84 and the support main body unit 85 can be moved by the wheel 83a of the base 83 with respect to the floor surface FL, but relative to the arm 86 and the hand 87 as the movable unit MV ′. Therefore, the arm control unit 84 and the support main body unit 85 correspond to the fixed unit FX ′. Further, the pressure sensor 89 attached to the hand 87 corresponds to the electric / electronic device EE ′.

  For this reason, between the control device 81 and the robot device 82, conventionally, a plurality of signal lines SL for transmitting control signals from the control device 81 to the arm control unit 84 and a single power line PL for supplying power to the robot device 82 are provided. Needed. In the robot apparatus 82, a signal line SL for outputting a sensor signal from the pressure sensor 89 to the arm control unit 84 or a pressure sensor from the arm control unit 84 between the pressure sensor 89 of the hand 87 and the arm control unit 84. The power line PL for supplying driving power to 89 is required. However, as described in the “Background Art” section, when such a plurality of signal lines SL and power lines PL are mixed and accommodated in the cable bear CB, these cables are rubbed against each other in the cable bear CB and disconnected. May occur.

  Therefore, in the third embodiment, the transmission unit 30Cs and the reception unit 30Cr described with reference to FIG. 1C are used as the transmission / reception unit 81a as the control device 81, and the transmission unit 30Cs and the reception unit 30Cr are used as the transmission / reception unit 84a. By providing each in the arm control unit 84, it is possible to transmit each of these control signals, power signals, and the like through a plurality of switchable power lines PL and PL ′. In the third embodiment, the transmitting unit 30As described with reference to FIG. 1A is provided in the hand 87 as the transmitting unit 88, and the receiving unit 30Ar is provided in the support body 85 as the receiving unit 85a. The sensor signal sent from the pressure sensor 89 can be transmitted by being superimposed on the power signal flowing through the power line PL. The power line PL and the signal line SL accommodated in the cable bear CB are the same as the electric wires, cables, cords, and the like described in the example of the printed circuit board inspection apparatus 60.

  Thus, the power line PL is physically made redundant by superimposing the control signal of the arm control unit 84 on the power signal flowing through the working power line PL and the standby power line PL ′ using code division multiple access. The movement of the robot device 82 (movable part MV) causes the arm control part 84 (electrical / electronic device EE) to move relative to the floor surface FL (fixed part FX), thereby the power line PL accommodated in the cable bear CB. Even if the signal line SL is rubbed and the signal line SL is disconnected, if at least one power line PL without disconnection remains, power supply and transmission / reception of each control signal are performed via the power line PL. Can be secured. In addition, since the number of cables connecting the control device 81 and the robot device 82 can be reduced, it is possible to reduce the load when the robot device 82 is moved by dragging the cables. On the other hand, since the degree of freedom of movement of the robot device 82 is increased, the probability of disconnection of the power line PL is also increased in the cable bear CB. Therefore, by providing the switching unit 40 in the transmission / reception units 81a and 84a, easy maintenance support at the time of disconnection is possible. Can be made possible. Further, since the sensor signal output from the pressure sensor 89 to the arm control unit 84 is transmitted superimposed on the power signal of the power line PL, the signal line SL can be eliminated.

  Further, these control signals and the like are transmitted and received, for example, by code division multiple access (for example, one logical channel LPch1) by spreading codes 1a to na generated from spreading code generators SC1a to SCna and spreading code generators SC1b to SC1b. And code division multiple access (for example, another logical channel LPch2) by spreading codes 1b to nb generated from SCnb or the like. As a result, since one power line PL can be physically divided into two or more channels, a logical transmission line can be made redundant by flowing the same signal through these logical channels LPch. .

  For this reason, even if a transmission error occurs in signal transmission through one logical channel LPch1, the code division multiple of another logical channel LPch2 is different from the spread code used in the code division multiple access of the one logical channel LPch1. Since the connection is made, there is a low possibility that a transmission error will occur in the signal transmission by the other logical channel LPch2. Thereby, it is possible to recover a transmission error by one logical channel LPch1 by a transmission signal by another logical channel LPch2. Therefore, error-free signal transmission can be performed without performing error correction processing due to the transmission error, and the occurrence of a communication error can be prevented almost completely. Therefore, between the control device 81 and the arm control unit 84, It is possible to suppress the disconnection and error of each control signal. Therefore, even if a very high speed real-time property is required as in the industrial robot 80, the request can be met.

  In addition, for example, when the number of control signals between the control device 81 and the arm control unit 84 is increased, or when the number of sensor signals between the arm control unit 84 increases due to an increase in the number of sensors attached to the hand 87. It is possible to easily cope with this by assigning a spreading code not used in code division multiple access such as an existing control signal to a spreading code such as the control signal to be increased. Therefore, it is possible to reduce the maintenance man-hour for the increase of the control signal between the control device 81 and the arm control unit 84 or the increase of the sensor signal between the arm control unit 84 and the hand 87.

  Furthermore, since the same control signal is spread by spreading codes 1b to nb different from spreading codes 1a to na for spreading these control signals and sensor signals, code division multiple access is performed, so that the same control signal as the control signal or the like Are superimposed on the same power signal, these signals can be individually despread. For this reason, even if these control signals are the same signals, they can be separated by a relatively simple configuration. Further, for example, when the number of signals such as the same control signal superimposed on the same power signal is an odd number and some of them have transmission errors, recovery can be performed by the majority method. Accordingly, with a relatively simple configuration, it is possible to suppress the failure or error of the control signal or sensor signal, or to reduce the maintenance man-hour for the addition of the control signal or sensor signal.

  In each of the above-described embodiments, an example in which a so-called metallic cable is used as the signal line SL has been described. However, in the case of a signal line, for example, the same operation and effect can be obtained even if an optical fiber cable is used. it can.

  In addition to the above-described embodiments, the manufacturing equipment of the present invention can be applied to, for example, those listed in the following A to H. An effect can be obtained for each.

A. Equipment related to printed wiring board production line There are subtractive methods and additive methods for manufacturing printed wiring boards, and the devices used there are divided into control device CN and movable part MV, both of which are cable bears, It can be applied to the following manufacturing equipment as being connected by a flat cable, a cable or the like.
(1) Drilling device: Core drilling, inner layer connection through-hole drilling (NC multi-axis drilling machine)
(2) Screen printing machine: through hole filling, solder resist printing, silk printing
(3) Plating equipment: Plating equipment such as electroless copper plating, electrolytic copper plating, Ni / Au plating, Ag plating
(4) Laser drilling device: Drilling device for via holes
(5) Press machine: Multi-layer press machine
(6) Inspection equipment: Conductor pattern inspection equipment
(7) Exposure equipment: batch exposure type exposure equipment, scanning exposure type exposure equipment

B. Equipment for printed wiring board assembly line Automatic assembly of printed wiring boards consists of soldering insert-type electronic components from an automatic insertion machine with a flow soldering device, and automatically mounting surface-mount electronic components on solder paste printing. There is a method of soldering with a reflow soldering apparatus. With the miniaturization and space saving of surface mount components, BGA type electronic components have come to be used. It is an apparatus used for this, and is divided into a control unit CN and a movable part MV, and can be applied to the following manufacturing equipment, assuming that both are connected by a cable bear, a flat cable, a cable or the like.
(1) Solder paste printing device
(2) Solder paste appearance inspection
(3) Electronic component mounting device: Automatic mounting device for surface mounting components, High-speed mounting device (Rotary head), General-purpose mounting device (Multi-axis head)
(4) Electronic component insertion machine: Automatic insertion device for inserted components
(5) Substrate outline processing equipment: router processing equipment, substrate cutting equipment
(6) Cleaning equipment: Batch type flux cleaning machine

C. Equipment related to assembly inspection of printed wiring boards Various inspections are performed before the printed wiring boards are assembled into electronic equipment and shipped from the factory. It is an apparatus used for the above, and is divided into a control unit CN and a movable part MV, and can be applied to the following manufacturing equipment, assuming that both are connected by a cable bear, a flat cable, a cable or the like.
(1) Open / Short inspection performed on a single printed wiring board: fixture checker using a jig, flying probe checker
(2) Mounting inspection performed after mounting components: Inspection of presence / absence of components, polarity inspection, solder fillet inspection
(3) X-ray solder connection inspection in mounting inspection after component mounting: BGA mounting inspection
(4) Open / short inspection after soldering: In-circuit test equipment
(5) Function inspection: Function test equipment

D. Equipment used in ceramic substrate production lines, etc. other than the preceding items A to C
(1) Green sheet multi punching device (drilling)

E. Equipment used in production lines for glass substrates and silicon substrates constituting liquid crystal display devices, semiconductor devices, etc. Used for production and inspection of glass substrates used in liquid crystal display devices, or assembly and inspection of liquid crystal display devices The device is divided into a control device CN and a movable portion MV, and both are connected by a cable bear, a flat cable, a cable, etc., and can be applied to the following manufacturing equipment.
(1) Screen printer: glass substrate, silicon substrate
(2) Plating equipment: glass substrate, silicon substrate
(3) Mounting equipment such as die bonding equipment, wire bonding equipment, flip chip bonding equipment, inner lead bonding equipment, etc.
(4) Open / short inspection: prober inspection device, LCD display device
(5) IC marking device
(6) Appearance inspection equipment: Foreign matter adhesion inspection such as dust, surface defect inspection equipment

F. Machine tool It is a machine tool and a device related thereto, and is divided into a control device CN and a movable part MV, and both are connected by a cable bear, a flat cable, a cable, etc., and can be applied to the following manufacturing equipment.
(1) Wire cutting / heat radiation processing machine
(2) Machining center
(3) Turning center
(4) Horizontal boring machine
(5) Milling machine
(6) NC lathe
(7) Grinder (surface grinder, cylindrical grinder)
(8) Profile grinder

G. Industrial robots Industrial robots and related devices are divided into a control unit CN and a movable part MV, and can be applied to the following manufacturing facilities as if they are connected by cable bears, flat cables, cables, etc. .
(1) Transfer robot
(2) Assembly robot
(3) Robots for transporting and moving parts and jigs built in the equipment. Image processing system
(1) Image processing device: gray scale image processing device, color image processing device, character recognition image processing device, 2D code image processing device, 3D image processing device
(2) Measuring instruments: Image measuring instrument, video microscope, confocal laser microscope, three-dimensional measuring instrument
(3) Inspection device: Character inspection device, printing surface appearance inspection device, device using CCD area sensor camera, device using line sensor camera, device using surveillance camera

  It goes without saying that the present invention is not limited to the above-described embodiments, and can be implemented in various modes as long as they belong to the technical scope of the present invention. In addition, the present invention can be applied if the control device CN and the movable portion MV are separated, and the device, inspection device, measuring device, equipment, etc. are connected by a cable, a flat cable, a cable bear or the like. it can.

FIG. 1A is a block diagram illustrating a configuration example of a signal transmission device that constitutes a manufacturing facility according to an embodiment of the present invention. FIG. 1A illustrates a case where one power line is used as a transmission line, and FIG. FIG. 1C shows a case where a plurality of power lines can be switched by the switching unit. FIG. 2A is a block diagram illustrating a configuration example of a signal transmission device that constitutes a manufacturing facility according to an embodiment of the present invention, and FIG. 2A illustrates a case where one power line and one signal line are transmission lines, respectively. 2 (B) shows a case where one power line and a plurality of signal lines are used as transmission lines, and FIG. 2 (C) shows a case where a plurality of power lines and one signal line are used as transmission lines. D) shows the case where a plurality of power lines and a plurality of signal lines are used as transmission lines. FIG. 3A is a block diagram illustrating a configuration example of a signal transmission device that constitutes a manufacturing facility according to an embodiment of the present invention. FIG. 3A illustrates transmission of a single power line and a plurality of signal lines that can be switched by a switching unit. 3 (B) shows a single signal line and a plurality of power lines that can be switched by the switching unit, and FIG. 3 (C) shows a plurality of switching lines that can be switched by the switching unit. When a plurality of signal lines that can be switched by the power line and the switching unit are used as transmission paths, respectively, these are respectively shown. FIG. 4A is a block diagram illustrating a configuration example of a signal transmission device that constitutes a manufacturing facility according to an embodiment of the present invention. FIG. 4A illustrates a case where a plurality of signal lines are used as transmission lines, and FIG. A case where a plurality of signal lines that can be switched by the switching unit are respectively used as transmission paths is shown. 1 to 4 are circuit diagrams showing examples of the configuration of the switching unit. FIG. 5 (A) shows a changeover switch, FIG. 5 (B) shows a changeover connector, and FIG. 5 (C) shows a changeover short pin. Show the case respectively. It is a block diagram which shows the structural example of the transmission part of the signal transmission apparatus which comprises the manufacturing equipment which concerns on embodiment of this invention. It is a block diagram which shows the structural example of the receiving part of the signal transmission apparatus corresponding to the transmission part shown in FIG. It is a block diagram which shows the structural example of the transmission part of the signal transmission apparatus which comprises the manufacturing equipment which concerns on embodiment of this invention. It is a block diagram which shows the structural example of the receiving part of the signal transmission apparatus corresponding to the transmission part shown in FIG. It is a block diagram which shows the structural example of the transmission part of the signal transmission apparatus which comprises the manufacturing equipment which concerns on embodiment of this invention. It is a block diagram which shows the structural example of the receiving part of the signal transmission apparatus corresponding to the transmission part shown in FIG. It is a typical lineblock diagram showing the example of composition of the printed circuit board inspection device concerning a 1st embodiment of the present invention. It is a typical block diagram which shows the structural example of the plating apparatus which concerns on 2nd Embodiment of this invention. It is a typical block diagram which shows the structural example of the industrial robot which concerns on 3rd Embodiment of this invention.

Explanation of symbols

20A, 20B, 20C, 20D, 20E, 20F, 20G, 20H, 20I, 20J, 20K, 20L ... Manufacturing equipment 30A, 30B, 30C, 30D, 30E, 30F, 30G, 30H, 30I, 30J, 30K, 30L ... Signal transmission equipment (signal transmission means)
30As, 30Bs, 30Cs, 30Ds, 30Es, 30Fs, 30Gs, 30Hs, 30Is, 30Js, 30Ks, 30Ls ... Transmitter (signal transmission means)
30Ar, 30Br, 30Cr, 30Dr, 30Er, 30Fr, 30Gr, 30Hr, 30Ir, 30Jr, 30Kr, 30Lr ... receiver (signal transmission means)
30 As 1, 30 As 2, 30 As 3, 30 Asm, 30 Bs 1, 30 Bs 2, 30 Bs 3, 30 Bsm, 30 Cs 1... Spreading unit (signal transmission means)
30Ar1, 30Ar2, 30Ar3, 30Arm, 30Br1, 30Br2, 30Br3, 30Brm, 30Cr1, 30Cr2, 30Cr3, 30Crm ... Despreading section (signal transmission means)
32, 36 ... integration unit (signal transmission means)
33 ... Adder (signal transmission means)
35: Distribution unit (signal transmission means)
37. Decoding unit (signal transmission means)
39: Determination unit (signal transmission means)
40. Switching unit (power line switching means, signal line switching means)
60 ... Printed circuit board inspection device (manufacturing device)
61 ... Control device (signal control device)
61a ... Transmitter / receiver (signal transmission device)
62 ... Table device (movable part)
63 ... Table control unit (electrical / electronic equipment)
63a ... Transmitter / receiver (signal transmission device)
65. Camera device (movable part)
66 ... Camera control unit (electrical / electronic equipment)
66a ... Transmitter / receiver (signal transmission device)
70 ... Plating equipment (manufacturing equipment)
71 ... Control device (signal control device)
71a ... Transmitter (signal transmission device)
72 ... Hanger device (movable part)
73 ... Motor control unit (electrical / electronic equipment)
73a... Receiver (signal transmission device)
75 ... Cylinder (Electrical / electronic equipment)
79A, 79B, 79C, 79D ... plating tank 80 ... industrial robot (manufacturing equipment)
81 ... Control device (signal control device)
81a ... Transmission / reception unit (signal transmission device)
82 ... Robot device (movable part)
84 ... Arm control section (signal control equipment, fixed section)
84a ... Transmitter / receiver (signal transmission device)
85 ... Supporting body part (fixing part)
85a: Receiver (signal transmission device)
87 ... Hand (movable part)
88 ... Transmitter (signal transmission device)
89 ... Pressure sensor (electrical / electronic equipment)
CB, CB '... cable bear CN ... control device (signal control equipment)
D1 to Dn: Input data D1 'to Dn': Output data EE ... Electric / electronic equipment FX ... Fixed part FL ... Floor surface (fixed part)
MV ... Moving part PL ... Power line PL '... Power line (other power lines)
SC1a, SC2a, SCna, SC1b, SC2b, SCnb, SC1c-nc, SC1m-nm ... Spread code generator (signal transmission means)
SL ... Signal line SL '... Signal line (other signal lines)
Wa, Wb, Wc ... Workpiece

Claims (11)

A manufacturing facility comprising an electric / electronic device in a movable portion, and a signal control device capable of transmitting / receiving an electric signal to / from the electric / electronic device to a fixed portion other than the movable portion,
A power line capable of supplying power from the fixed part to the electric / electronic device;
A transmission signal as an input signal input from the signal control device to the electric / electronic device or an output signal output from the electric / electronic device to the signal control device is used by code division multiple access using a predetermined spreading code. And transmitting the signal transmitted between the electric / electronic device and the signal control device by superimposing it on the power signal flowing through the power line, and transmitting the same signal as the transmission signal to another spreading code different from the predetermined spreading code. A signal transmission means for transmitting a signal between the electric / electronic device and the signal control device by superimposing on the power signal flowing through the power line using code division multiple access according to
A production facility comprising: The power line is plural,
2. The manufacturing equipment according to claim 1, wherein the signal transmission means superimposes the same signal as the transmission signal on a power signal flowing through the plurality of power lines using code division multiple access. Other power lines capable of supplying power from the fixed part to the electric / electronic device,
Power line switching means capable of switching the power line to the other power line,
3. The signal transmission means superimposes the same signal as the transmission signal on a power signal of the other power line switched by the power line switching means using code division multiple access. Equipment for manufacturing as described. A manufacturing facility comprising an electric / electronic device in a movable portion, and a signal control device capable of transmitting / receiving an electric signal to / from the electric / electronic device to a fixed portion other than the movable portion,
A plurality of power lines capable of supplying power to the electrical / electronic device from the fixed portion;
A transmission signal as an input signal input from the signal control device to the electric / electronic device or an output signal output from the electric / electronic device to the signal control device, the plurality of power lines using code division multiple access Signal transmission between the electric / electronic device and the signal control device superimposed on a power signal flowing through one of the power lines, and the same signal as the transmission signal is transmitted to the other power line of the plurality of power lines. A signal transmission means for performing signal transmission between the electric / electronic device and the signal control device superimposed on a power signal flowing through
A production facility comprising:   The manufacturing facility according to claim 4, further comprising power line switching means capable of switching the one power line to the other power line. Comprising one or more signal lines capable of transmitting an input signal input from the signal control device to the electrical / electronic device or an output signal output from the electrical / electronic device to the signal control device;
The manufacturing equipment according to claim 1, wherein the signal transmission unit transmits the same signal as the transmission signal to the signal line using code division multiple access. Other signal lines capable of transmitting the transmission signal;
Signal line switching means capable of switching the signal line to the other signal line,
7. The manufacturing method according to claim 6, wherein the signal transmission unit transmits the same signal as the transmission signal to the other signal line switched by the signal line switching unit using code division multiple access. Equipment. A manufacturing facility comprising an electric / electronic device in a movable portion, and a signal control device capable of transmitting / receiving an electric signal to / from the electric / electronic device to a fixed portion other than the movable portion,
A plurality of signal lines capable of transmitting a transmission signal as an input signal input from the signal control device to the electric / electronic device or an output signal output from the electric / electronic device to the signal control device;
The transmission signal is transmitted to one of the plurality of signal lines using code division multiple access to perform signal transmission between the electric / electronic device and the signal control device, and the transmission signal A signal transmission means for transmitting the same signal to another signal line of the plurality of signal lines and performing signal transmission between the electric / electronic device and the signal control device;
A production facility comprising: Among the plurality of signal lines, when there is another signal line to which the transmission signal is not sent out by the signal superimposing means,
A signal line switching means capable of switching a signal line through which the transmission signal is transmitted by the signal transmission means to the other signal line;
9. The manufacturing method according to claim 8, wherein the signal transmission means transmits the same signal as the transmission signal to the other signal line switched by the signal line switching means using code division multiple access. Equipment.   10. The signal transmission unit according to claim 4, wherein the signal transmission unit performs the code division multiple access by spreading the same signal using a spreading code different from a predetermined spreading code for spreading the transmission signal. Equipment for manufacturing as described in the paragraph. A manufacturing facility comprising an electric / electronic device in a movable portion, and a signal control device capable of transmitting / receiving an electric signal to / from the electric / electronic device to a fixed portion other than the movable portion,
A power line capable of supplying power from the fixed part to the electric / electronic device;
A transmission signal as an input signal input from the signal control device to the electric / electronic device or an output signal output from the electric / electronic device to the signal control device, the power of the power line using code division multiple access Signal transmission means for performing signal transmission between the electric / electronic device and the signal control device superimposed on a signal;
A production facility comprising:

Images