JP2003186513A - Communication control method for operation board and remote i/o - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To resolve the problem, in a system connecting NC (Numerical Control) devices to operation boards and connecting the NC boards to a plurality of remote I/Os with serial communication lines, the communication lines of the NC devices connected to the operation boards are controlled in a manner quite different in communication from that connected to the I/O boards, so that the communication lines do not have flexibility in usage and there is lacking in flexibility as a system, and to provide a communication control method for operation board and remote I/O, capable of enhancing the flexibility as the system. <P>SOLUTION: In the system, transmission and reception between the NC devices and the operation boards and between the NC devices and remote I/Os are preformed with the same frame length and with the same communication period, so that the operation boards and remote I/Os for the NC devices can be connected to a shared communication controller. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an operation board, a remote I / O communication control method, and a control device such as an NC device which is a numerical control device, a PC (programmable controller) device, and other control devices. An operation board having an operation board that is separately installed and connected to the control device, and a remote I / O that is installed separately to the control device like the operation board and has an input / output unit for a machine connected to the control device. The present invention relates to a remote I / O communication control method, which is an operation board and a remote I / O communication control method in which flexibility of connection between a control device and an operation board or a remote I / O is improved.

[0002]

2. Description of the Related Art FIG. 16 shows the configuration of a conventional operation board and remote I / O communication control method. In the conventional example shown in FIG. 16, an NC device is used as a control device, and the configuration of the connection system between the NC device and remote I / O, the operation board, and the servo amplifier / spindle amplifier is shown. In FIG. 16, 1 is NC
Device, 2 are multiple remote I / Os, 3 is an operation board attached to the NC device 1, 4 is a servo amplifier / spindle amplifier connected to the NC device 1, 5 is a servomotor connected to the servo amplifier / spindle amplifier・ Spindle motor / encoder.

Further, 101 is an MPU for controlling the entire NC unit 1.
, 102 is a ROM storing the operation program of the MPU 101 of the NC device 1, 103 is a RAM used as an operation work area of the MPU 101 of the NC device 1, and 104 is a communication between the NC device 1 and the operation board 3. The operation board communication controller on the NC unit side, 105 is the remote I / O communication controller that communicates between the NC unit 1 and the remote I / O 2, and 106 is the NC unit 1 and the servo amplifier / spindle amplifier 4 It is a servo / spindle communication control unit that performs communication between the two, and the NC device 1 is configured by these.

Reference numeral 107 denotes an operation key switch forming the operation board 3, and reference numeral 108 denotes a display section including an LED display device forming the operation board 3. Also, 111 is the NC device 1 and remote
A transmission / reception signal line between the I / O 2, 112 is a transmission / reception signal line between the operation board 3 and the NC device 1, and 113 is a transmission / reception signal line between the servo amplifier / spindle amplifier 4 and the NC device 1.

FIG. 17 shows a schematic structure of a conventional operation board 3. Further, FIG. 18 shows a schematic configuration of a conventional remote I / O 2. In FIG. 17, 21 is an MPU that controls the entire operation board 3, 22 is an operation board communication control unit on the operation board side that communicates with the NC device 1, and 23 is an MPU 21 of the operation board 3.
ROM that stores the program S / W that controls the operation of the
Is a RAM used as an operation work area of the MPU 21 of the operation board 3, 25 is an operation board LED output holding unit for displaying and outputting to the LED display 108 of the operation board 3, and 26 is a scan of the operation keys of the operation board 3. Operation board SCAN address generation unit that generates an address for
SC based on the address generated by the address generator 26
Operation board SCAN for inputting operation key data
The data input section 28 is a switch matrix and LEDs on the operation board that the operator actually operates, and 29 is an operation board selection switch for selecting the type of the operation board 3 in order to determine the type.

In FIG. 18, 31 is from the remote I / O 2.
A transmitter for transmitting data to the NC device 1, a receiver 32 for receiving data transmitted from the NC device 1 to the remote I / O 2,
33 is a transmission data holding unit that holds the data transmitted from the transmission unit 31, 34 is a reception data holding unit that holds the data received by the reception unit 32, and 35 is the remote I / O input to the remote I / O 2. A filter unit that filters the input signal, 36 is a remote I / O output signal holding unit that receives the signal from the received data holding unit 34 and holds the remote I / O output signal, and 37 receives the receiving signal from the receiving unit 32. , A reception alarm detection unit that outputs a reset signal to the output signal holding unit 36 when there is no reception for a certain period of time, 38 is a remote I / O 2
This is a rotary switch for setting the remote I / O station number for setting the station number. The remote I /
In the O 2 configuration, input / output signals are input / output to / from the remote I / O 2 and data is transmitted / received to / from the NC device 1, and are configured by a communication control unit.

FIG. 19 is a diagram showing a schematic configuration of the operation board communication control unit 104 on the conventional NC device 1 side. In FIG. 19, reference numeral 41 is a transmission unit for transmitting data from the NC device 1 to the operation board 3, 42 is a reception unit for receiving data transmitted from the operation board 3 to the NC device 1, and 43 is a transmission unit for the operation board 3.
A transmission data holding unit for holding data to be transmitted from
44 is a received data holding unit for holding the data received from the operation board 3, 45 is a transmission start command control unit for outputting a transmission start command for the MPU 101 of the NC device 1 to transmit data from the transmission unit 41, 46 Is a transmission status control unit for the MPU 101 of the NC device 1 to monitor the transmission state of the transmission unit 41,
Reference numeral 47 is a reception start command control unit that outputs a reception start command for the MPU 101 of the NC device 1 to start reception of the reception unit 42, and 48 is a reception status for the MPU 101 of the NC device 1 to monitor the reception state of the reception unit 42. It is a control unit.

As shown in FIGS. 16 to 19, the conventional NC
Transmission / reception between the device 1 and the operation board 3 and transmission / reception between the NC device 1 and the remote I / O 2 are individually configured. The NC device 1 and the remote I / O 2 are connected in series. It was connected by communication. Further, the operation board 3 is S / W controlled by the MPU 21 of the operation board 3 similarly to the NC device 1, and as the S / W processing of the MPU 21 on the operation board 3 side, the operation key of the operation board 3 by the operator is used. The process of transmitting the input from 107 to the NC unit 1, and the data transmitted from the NC unit 1 to notify the operator of the state of the NC unit 1 is LE.
There was processing such as outputting to the D display unit 108. Remote I / O
As shown in FIG. 18, the communication control unit 2 is composed of a communication control unit, like the NC device 1 or the operation board 3.
The operation is not controlled by MPU.

The conventional operation board shown in FIGS.
The operation related to the configuration of the remote I / O communication control method will be explained focusing on the operation of the operation board. Regarding the operation of the remote I / O, the remote I / O does not have an MPU, there is no operation control by the MPU, it operates as a communication control unit, and is controlled by the NC unit 1. FIG. 20 shows an operation flow of the program S / W processing of the MPU 101 of the conventional NC device 1, and FIG. 21 shows the conventional NC device 1
The operation flow of the program S / W processing of the input / output to / from the operation board 3 and the remote I / O 2 in the MPU 101 is shown. Also,
FIG. 22 is an operation flow of the program S / W processing of the control MPU 21 on the operation board 3 side.

Generally, a machine tool in which an NC device is used is
There are various types of operation boards because operation boards that match the characteristics of the machine tool to which the NC device is attached are attached. Then, when the system of the NC device is started, it is unconfirmed what kind of operation board is connected. Therefore, first, as shown in FIG.
When the system of the device 1 is started, the MPU 101 of the NC device 1 becomes NC
A frame for making a status request from the device 1 to the operation board 3 is created (step S1 (hereinafter, step is referred to as S). That is, what kind of operation board is connected to the NC device 1) Create a frame that is a signal for checking.

Next, the MPU 101 of the NC device 1 has the operation board 3
In response, the created frame is transmitted to the operation board 3 for requesting the status of the operation board (S2). The operation board 3 receives the transmitted frame, the operation board 3 transmits a frame including status information to the transmission frame to the NC device 1, and the NC device 1 receives the frame (S3). The NC device 1 analyzes the received status information (S4). Then, the NC device 1 executes the processing for the input of the operation key from the operation board 3 suitable for the operation board 3 and the output processing of the data to the LED display 108 for the operation board 3 based on the analysis result. (S5).

After performing status analysis of which type of operation board 3 is connected, the MPU 101 of the NC device 1
The status request mode of the operation board 3 is switched to the normal mode, and the operation board 3 generates and sends a normal transmission frame including the data to be output to the LED display 108 (S6), and at the same time, from the operation board 3 to the operation key 107. The frame including the data input by is received (S
7). Then, the MPU 101 of the NC device 1 receives the reception status every time,
While executing the received data analysis, based on the result, the process of creating and transmitting a normal transmission frame including the data to be output to the LED display 108 of the operation board 3 is repeated (S8). Here, the operation mode of the NC device 1 is switched according to the input from the operation key 107 of the operation board 3, and the LED display 108 corresponding to the operation mode is changed.
The data is transmitted so that the display output to is performed.

Note that FIG. 21 shows the operation flow of the program S / W processing of the input / output to / from the operation board 3 and the remote I / O 2 in the MPU 101 of the NC device 1, and the NC device 1 It shows the state of switching the communication with the remote I / O 2. That is, the input / output processing according to the flow shown in FIG. 20 for the operation board 3 is performed based on the periodic timer interruption (S61), and then the normal remote I / O input / output processing is performed for the remote I / O 2. Is performed (S62). After that, other processing is performed (S63), and the return from the interrupt processing routine is performed.

Next, the MP on the operation board 3 side shown in FIG.
Operation board 3 according to U21 program S / W processing flow
The operation of the MPU 21 on the side will be described. First, when the system is booted, the MPU 21 will
5, 27, initialization of the communication control unit 22, and switch information of the operation key 107 of the operation board 3 are read, and a waiting state for a frame transmitted from the NC device 1 is entered (S21). next
When the reception completion of the frame transmitted from the NC device 1 is detected (S22), it is checked whether the reception is normally completed (S23). If the reception is normal, the LED output holding unit 25 of the operation board 3 is checked. The received display output data to the LED display 108 is set, and the status indicating normal reception is set in the frame transmitted to the NC device 1 (S2).
4). When a reception error is detected, the reception error detection status is set in the frame transmitted to the NC device 1 (S25).

Next, whether the frame transmitted from the NC device 1 is in the connection ID request communication mode for requesting a response of what kind of operation board is connected, or other normal It is determined whether the transmission mode is set (S26). In the case of the connection ID request communication mode, a connection ID transmission frame including that information is generated from the status information of the operation board 3 (S27) and transmitted to the NC device 1 (S2).
8) Then, it returns to the waiting state for receiving the data transmission from the NC device 1 again (S22). In (S26), NC device 1
If the frame transmitted from is a normal transmission frame, the received display output data to the LED display unit 108 is set in the LED output holding unit 25 of the operation board 3 (S29), and the operation key 107 of the operation board 3 is set. NC device 1 based on input from
A normal transmission frame to the NC device 1 is generated (S30), is transmitted to the NC device 1 (S31), and is returned to the reception waiting state for data transmission from the NC device 1 again (S22).

That is, when the operation board 3 detects that the frame transmitted from the NC device 1 to the operation board 3 is received, it is determined whether the frame is a connection ID request communication frame or a normal transmission frame. This determination is made using an identification code (hereinafter referred to as a header pattern) included in the frame. Then, in the case of a connection ID request communication frame, a transmission frame including the reception status (normal reception status or reception error detection status) and the status information of the operation board 3 is generated and transmitted to the NC device 1. On the other hand, when the operation board 3 receives a normal transmission frame, CRC is added to the reception frame.
At the time of normal reception without any error, set the output signal to be displayed and output on the LED display 108 to the LED output holding unit 25 of the operation board 3 and set the normal reception status.
If there is a CRC error in the received frame, set the receive error detection status. Subsequently, by scanning the operation key 107 of the operation board 3, the input information input from the SCAN data input unit 27 is incorporated into a transmission frame together with the normal reception status or reception error detection status and transmitted to the NC device 1. When the transmission is completed, the reception waiting state is restored again. After that, when the frame transmitted from the NC device 1 to the operation board 3 is received, the above operation is repeated.

A supplementary description will be given of the configuration diagrams of the operation board 3, the remote I / O 2, and the operation board communication control unit on the side of the NC device 1 shown in FIGS.
In the transmission processing (S1 and S2 in FIG. 20) for transmitting a frame for status request from the MPU 101 of the NC device 1 to the operation board communication control unit on the side, the data to be transmitted to the transmission data holding unit 43 Is set in advance and the transmission start command control unit 45 is made to write the transmission start command, and at the same time, the reception start command control unit 47 is also prepared as a preparation for receiving a frame transmitted from the operation board 3 thereafter. The reception start command write input is performed in preparation for reception from the operation board 3. Also,
In the schematic configuration diagram of the operation board 3 shown in FIG. 17, the operation board MPU 21 displays the operation board LED in the output processing (S29 of FIG. 22) to the LED display 108 of the operation board 3.
Write the LED output data to the output holding unit 25,
In the operation key input process (S30 in FIG. 22), the scan address is set in the operation board SCAN address generation unit 26, and the input of the operation key 107 is read to the operation board SCAN data input unit 27.

[0018]

SUMMARY OF THE INVENTION The present invention has been made to solve the problems of the following conventional operation board and remote I / O communication control method. That is, in the conventional method, completely different communication control is performed between the NC device 1 and the operation board 3, and between the NC device 1 and the remote I / O 2.
The communication control unit 104 dedicated to the operation board 3 in the NC device 1
And a transmission / reception signal line 112 are provided, and remote I / O2
For this reason, a dedicated communication control unit 105 and a transmission / reception signal line 111 are provided, each having a separate serial signal line, and there is a problem that the application is fixed and the system lacks flexibility. . In particular, in controlling a machine tool, the operation board 3 is often used temporarily, and although it is not necessary to connect the operation board 3 during normal control of the machine tool, Providing a dedicated signal line or the like lacked the flexibility of the system configuration.

Further, in the conventional system, the NC unit 1 itself has an MPU1
In addition to having 01, in order to realize the function of the operation board 3,
Like the NC unit 1, the operation board MPU is also installed on the operation board 3 side.
21 was provided and the function of the operation board 3 was realized by the program S / W control.
Since the memories 23 and 24 necessary for the U 21 and MPU operations are required, there is a problem that the H / W cost of the operation board 3 becomes large.

Further, in the conventional method, when the input from the operation keys 107 on the operation board 3 is taken into the NC device 1,
And LED display 10 to display the operation confirmation of NC device 1.
The blinking control process to 8 is performed by S / W control using MPU 21, which makes the system expensive and requires S / W development for its control operation, which causes a heavy development load. , There was a problem that if there was a mistake in S / W creation, the system might not work properly.

Further, in the conventional method, the code conversion table data when the input from the operation keys 107 on the operation board 3 is taken into the NC device 1 is stored in the memory ROM of the operation board 3.
When the frame is sent to the NC device 1, it is already converted into data that can be read by the NC device 1, and the code conversion table data is provided for each operation board 3, which makes data management complicated. There was a problem of becoming.

Furthermore, Japanese Patent Laid-Open No. 60-5 as a conventional device.
In the numerical control device disclosed in Japanese Patent No. 4012, a configuration is shown in which the NC operation board and the machine operation board can be switched and connected to the same interface of the numerical control device. This is merely an idea of switching, no improvement has been made on the NC operation board, no specific communication control method has been specified, and the device lacks flexibility.

The present invention has been made to solve the above-mentioned problems of the conventional operation board and remote I / O communication control method. The control apparatus such as an NC device and the operation board or remote I / O are provided. The purpose is to make the connection between and to be flexible and improve the flexibility of the system configuration.

Further, according to the present invention, as the operation board and remote I / O communication control method, the operation board is processed by the communication control unit to reduce the size and cost of the operation board.
The purpose is to reduce the size and cost of the entire device.

Further, according to the present invention, the control on the operation board side is performed.
The MPU is deleted to reduce the load of the program S / W development work, the control part of the operation board is miniaturized, the system does not require an operation board, the operation board control system is improved in reliability, and The purpose is to reduce the price.

Further, according to the present invention, the management of the code conversion table data can be unified, and the operation board and the remote I / O which can be centrally managed on the same memory as the system S / W of the control device. The purpose is to obtain a communication control method.

Further, according to the present invention, the serial signal connection portion between the control device and the operation board can be used as the serial signal connection portion for remote I / O when the operation board is not used, and the remote I / O communication. The purpose is to obtain a control method.

[0028]

In the operation board and remote I / O communication control method according to the present invention, an operation board or remote I / O attached to a control device connected to a control device for machine control of a machine tool. Operation board with O,
A remote I / O communication control method for transmitting / receiving data between a control device and an operation board and for controlling the control device and remote I / O.
Data is sent and received between the two devices at the same frame length and at the same communication cycle, and when the operation board is removed from the control device, the operation board removal switch provided on the operation board or the control device is provided. When operating the connected device removal switch, or when removing the remote I / O from the control device, operate the connected device removal switch provided in the control device or the remote I / O removal switch provided in the remote I / O. Then, the communication control unit of the control device transmits a communication frame for recognizing the type of the operation board to be connected.

Further, the controller is an operation board / remote I
It has an I / O shared communication control unit, and an operation board or remote I
/ O can be switched and connected to the operation board / remote I / O shared communication control unit of the control device.

Further, when the control device is an NC device and the data is transmitted and received between the NC device and the operation board, the display data is transmitted from the NC device to the display section of the operation board, and the data is transmitted from the operation board.
It is to send the operation key input data of the operation board to the NC unit.

From the operation board or remote I / O
The frames transmitted to the NC device have different identification codes.

The address signal for scanning and reading the operation key input data on the operation board depends on the identification code of the frame transmitted from the NC device to the operation board.

Further, in response to the transmission of the frame from the NC device to the operation board, the operation key input data of the operation board is transmitted to the NC device.

Further, the communication control section of the NC device, which is a control device, transmits a communication frame for recognizing the type of the operation board to be connected to the operation board, and the connected operation board sends information indicating the type to the NC. The NC device transmits the code conversion table data corresponding to the operation key input data of the operation board to the operation board based on the transmitted information and stores it in the memory of the operation board.

If a plurality of operation keys are operated when a frame is transmitted from the NC device to the operation board and the operation key input data of the operation board is scanned and read, the communication control section on the operation board side is A mode in which the priority operation key is extracted and the code is converted by the code conversion table data stored in the memory of the operation board and transmitted to the NC device.
It has a mode in which the input data of the operation key is transmitted to the NC device as it is.

Further, the code conversion table data transmitted from the NC device is transmitted from the NC device to the operation board in a plurality of divided frames, and the address of the memory in which the code conversion table data is stored is the identification code of the frame. It depends.

Also, every time the code conversion table data transmitted from the NC unit in a plurality of frames is normally transmitted a predetermined number of times, the operation board transmits a frame having an unusual identification code to the NC unit. To do.

Further, when the code conversion table data is divided into a plurality of frames and transmitted from the NC device, the frame identification code is transmitted using an identification code different from the normal one,
When the NC device receives a frame for confirming the normal transmission of the code conversion table data from the operation board, the identification code of the frame transmitted from the NC device is restored to the normal identification code.

Further, the address for displaying on the display section of the operation board depends on the identification code of the frame of the display data transmitted from the NC device to the operation board on the display section.

[0040]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiment 1 of the Invention FIG. 1 is a diagram showing an example of the configuration of an operation board and a remote I / O communication control method according to the present invention. Embodiment 1 shown in FIG.
In the figure, a controller using the NC device 1 is shown. In FIG. 1, 109 is an operation board / remote I / O shared communication control unit that constitutes the NC device 1, and is a remote I / O 2 or a transmission / reception signal line via a transmission / reception signal line 111.
One of the operation boards 3 is connected via 112. Further, 110 is an operation board / remote I / that composes the NC unit 1.
This is an O-connected device removal switch, and is a switch that is operated when the connected device of either the operation board 3 or the remote I / O 2 is removed. Note that FIG. 1 is a system diagram, and a specific operation will be described below. Further, in FIG. 1, the same or corresponding parts as those of the conventional example shown in FIG. 16 are designated by the same reference numerals.

FIG. 2 is a diagram showing a schematic configuration of the operation board and the operation board 3 used in the remote I / O communication control method according to the present invention. Further, FIG. 3 is a diagram showing a schematic configuration of the remote I / O 2. In FIG. 2, 210 is an operation board communication control unit on the operation board side that communicates with the NC device 1, 211 is an operation board removal switch operated when the operation board 3 is removed from the NC device 1, and 212 is an operation board. It is an operation board mode changeover switch operated when changing the mode of No. 3. Note that in FIG.
The same or corresponding parts as those of the conventional example shown in FIG.

The operation board 3 shown in FIG.
Compared to the conventional device of No. 7, it has a configuration that does not use MPU on the operation board. And operation board communication controller
The 210 operates even without the MPU on the operation board 3 side. Moreover, since there is no MPU, there is no need for a ROM that stores the program software for operating the MPU and a RAM that is used as an MPU operation work area. Therefore, in this embodiment, all of the operation board communication control units 210 operate instead.

In FIG. 3, reference numeral 39 is a remote I / O removal switch, which is operated when the remote I / O 2 is removed from the NC device 1. In FIG. 3, the same or corresponding parts as those of the conventional example shown in FIG. 18 are designated by the same reference numerals. When the operator operates this switch 39, the remote I / O transmitter 31 is switched from the switch 39.
Signal is input to the NC device 1 and the identification code (also called header pattern) of the transmission frame transmitted from the remote I / O 2 to the NC device 1 is switched, and the NC device 1 recognizes the detached state of the remote I / O 2. To do. Further, at the same time when the switch 39 is operated, the reception alarm OFF signal is transmitted to the reception alarm detection unit 37, and the reception alarm detection unit 37 resets the output signal holding unit 36 even when reception from the NC device 1 is stopped. Try not to. The operation caused by this reception alarm OFF signal is that the remote I / O 2 is disconnected from the NC device 1,
It is necessary as a function to hold the output even if the reception from the NC unit 1 to the remote I / O 2 is lost.

FIG. 4 is a diagram showing a schematic configuration of the operation board communication control unit 109 on the side of the NC device 1 used in the operation board and remote I / O communication control method according to the present invention. In FIG. 4, reference numeral 49 is a transmission start H / W timer, which has the same function as the communication control unit on the NC device 1 side has with respect to the remote I / O in the conventional device. 410 is NC
A transmission mode switching control / switching status control unit that holds various transmission modes switched by the MPU 101 of the device 1, 411 is an operation board code for controlling transmission / reception when transferring the code conversion table to the operation board 3. It is a transfer control unit. In FIG. 4, the same or corresponding parts as those of the conventional example shown in FIG. 19 are designated by the same reference numerals.

Here, NC device 1, operation board 3, remote
The operation related to the communication of each communication control unit of I / O 2 is the same as the one that supports a general HDLC protocol. In the communication control among the NC device 1, the operation board 3 and the remote I / O 2 shown in this embodiment, the short frame length which is used between the NC device 1 and the remote I / O 2 is controlled. Utilizing the high-speed communication control method by the transmission / reception frame using
Communication between the device 1 and the operation board 3 is a high-speed communication control method using a transmission / reception frame using a similar short frame length, and the communication control unit 109 (also referred to as serial communication I / F) of the NC device 1 is used. The operation board 3 and the remote I / O 2 were switched and connected so that they could be used.

FIG. 5 is a diagram showing the details of the internal configuration of the operation board communication control unit 210 of the operation board 3 shown in FIG. In FIG. 5, reference numeral 51 is a signal receiving unit from the NC device 1 to the operation board 3, 52 is a signal transmitting unit from the operation board 3 to the NC device 1, and 53 is a reception unit that holds the reception data received by the reception unit 51. A data holding unit, 54 is a transmission data holding unit that holds the transmission data transmitted from the transmission unit 52, and 55 is an LED or the like for outputting the reception data held by the reception data holding unit 53 to the outside of the communication control unit 210. A display unit data output unit to the display unit of the display unit 56, and a display unit address generation unit 56. The address is set to the communication control unit 210 so that the operation board LED output holding unit 25 shown in FIG. 2 holds the output to the LED. Output to the outside of.

Reference numeral 57 is a display section data write pulse generation section, which generates a data write pulse in synchronization with the LED output data from the display section data output section 55.
Reference numeral 58 is an operation key scan address generation unit that generates a scan address of the operation key 107 of the operation board 3, and 59 is an operation key scan data input unit, which is loaded based on the scan address generated by the operation key scan address generation unit 58. This is a data input section.

An address comparator 510 compares the signal state of the operation key scan address generated by the operation key scan address generation unit 58 with the external setting input set outside the communication control unit. 511 is the NC device 1
The reception data counter that counts the number of data bytes (BYTE) of the reception frame received by the receiving unit 51 from, and 512 receives the signal from the receiving unit 51 and is a code conversion table memory.
A code conversion table WR control unit that outputs a signal for controlling writing to 513, and 513 is a code conversion table memory, which is input by the operation keys 107 and is obtained by scanning the operation keys 107. A code conversion table for code conversion of the data input to the input unit 59 is stored.

Reference numeral 514 is a priority encoder which selects only the operation key of the highest priority from the inputs of a plurality of operation keys 107 when the same operation key is scanned while the operation keys 107 are being scanned. Is. 51
5 is a code conversion unit that reads out and holds the corresponding operation key code data from the code conversion table memory 513 based on the output of the priority encoder 514.
6 is a multiplexer MPX for switching between the data held in the code conversion unit 515 and the data input to the operation key scan data input unit 59, and 517 is the code of the operation key 107 transferred from the NC unit 1 in multiple times. It is a reception cycle counter that outputs the write address of the conversion table data. 518 is an OR gate, which is an address comparator 510
The signal from the operation board mode changeover switch 212 is input and the signal is output to the multiplexer 516. 519 is a code conversion table transfer control unit.

FIG. 6 is an operation explanatory view for explaining the operation of the code conversion unit 515 of the operation board constituting the operation board communication control unit 210 shown in FIG. 5 in more detail. 6, the same reference numerals as those in FIG. 5 indicate the same parts. In FIG. 6, reference numeral 61 denotes an address signal input to the code conversion table memory 513 during normal operation of the operation board 3, which is a signal including a scan address of the operation key and coded scan data of the operation key. Reference numeral 62 is a multiplexer for switching the address during normal operation and when writing the code conversion table to the operation board 3. 63 is
The address signal 61 and the address signal 63 are 8 bits (8 BIT), which are address signals for designating addresses when writing the code conversion table in the code conversion table memory 513 of the operation board 3. 64 is a data output gate, which corresponds to the code conversion unit 515 in FIG.
It holds the read data from the code conversion table memory 513 and receives the presence / absence signal of the input from the operation key 107 from the priority encoder 514 to clear the held data.

Next, the specific operation of the operation board communication controller 210 of the operation board 3 will be described with reference to FIGS. First, when the system is started in a state where the NC device 1 and the operation board 3 are connected, the NC device 1 sends a connection ID request requesting a response as to what kind of operation board is connected. The frame is transmitted to the operation board 3, and the transmitted frame is received by the receiving unit 51. Receiver
51 transmits the header pattern of the connection ID request transmission frame as a recognition signal to the transmission unit 52. The transmitter 52
The ID information indicating the type of the operation board 3 selected by the operation board selection switch 29 is transmitted to the NC device 1. Along with this, the NC device 1 receives the connection ID information frame of the operation board 3 transmitted from the transmission unit 52, and the operation board 3 receives the connection ID information frame.
Of the code conversion table data corresponding to the type, the transmission data holding unit 43 of the communication control unit 109 of the NC device 1 is recognized.
, And switch to the transmission mode of code conversion table data.

When the NC device 1 is switched to the transmission mode of the code conversion table data, the communication control unit 109 of the NC device 1
Sends a transmission frame including a header pattern indicating the code conversion table transmission mode to the operation board 3. The code conversion table data included in the reception frame received by the reception unit 51 of the operation board 3 is written in the code conversion table memory 513.

Normally, when the code of the operation key data input from the operation key 107 of the operation board 3 is converted, as shown in the address signal 61 of FIG.
(5BIT) and the coded operation key scan data (3BIT) from the priority encoder 514 need to be read as the address input of the code conversion table memory 513. That is, this means that it is necessary to prepare the code data corresponding to the scan input of 8 bits of the operation key 107, and the address signal 61 for 8 BIT and the code conversion table memory 51 for 256 BYTE.
Three areas are required.

Therefore, when transferring the code conversion table data from the NC unit 1 to the operation board 3, the address signal
Address of 8 BIT shown in 63 is code conversion table memory
Must be entered in 513. Here, the 8-bit address signal 63 is included in the output from the reception data counter 511 which is the lowest 2 BIT and the header pattern of the reception frame.
3BIT and the receive cycle counter that constitutes the highest 3BIT
And the output from 517.

The reception data counter 511 is a counter for counting 4 BYTE worth of data contained in the transmission frame from the NC unit 1, and is the lowest BIT for determining the address for each code conversion table data transmitted from the NC unit 1. Become. The header pattern of the received frame is one in which the header pattern of the frame transmitted from the NC device 1 changes from 000 to 111, and this header pattern in the transmission frame order is used. Receive cycle counter 517 is 000 to 111
Is a counter that counts the number of reception cycles. One cycle from the NC unit 1 is 32BY.
As the code conversion table data for TE is included,
This is a counter that generates the highest address (000 to 111) for eight cycles.

The multiplexer 62 is a switch for switching the address input by the address signal 61 at the time of code conversion of the operation key data input from the operation keys 107 of the normal operation board 3 and the address at the time of transfer of the code conversion table data. It is configured and can be switched by receiving a signal from the receiving unit 51. In the code conversion table memory 513, in addition to the address signal from the multiplexer 62, the data from the reception data holding unit 53 and the code conversion table are stored.
The write signals from the WR controller 512 are input, both of which are controlled by the signal from the receiver 51 and correspond to the code conversion table data transmitted from the NC device 1 together with the address signal from the multiplexer 62. Written to address.

Next, when the transfer of the code conversion table data is completed and the NC device 1 is switched from the transmission mode of the code conversion table data to the transmission mode of the normal signal, the NC device 1 transmits the transmission frame indicating the normal mode. The receiver
When transmitted to 51, the received data is held in the received data holding unit 53 in the receiving unit 51 and input to the display unit data output unit 55. Further, a display section address generation section 56, a display section data write pulse generation section 57, an operation key scan address generation section
Reference numeral 58 denotes an operation board LED output holding unit external to the communication control unit 210 of the operation board 3 in response to a control signal from the receiving unit 51.
Address signal for 25 (Fig. 2), also operation board LE
D Output data write signal for the output holding unit 25 and scan address signal for the switch matrix 28 (FIG. 2) on the operation board are generated.

When the scan address signal from the operation key scan address generation unit 58 is transmitted to the switch matrix 28 on the operation board, the operation key scan data corresponding to the scan is input to the operation key scan data input unit 59, Transmission data holding unit that passes through the priority encoder 514, code conversion unit 515, and multiplexer 516
The data is stored in the transmission data storage unit 54 through the multiplexer 516 from the direct operation key scan data input unit 59.

The multiplexer 516 constitutes a switch similar to the multiplexer 62 of FIG. 6, and the switching can be switched by the operation board mode changeover switch 212 or by the input from the address comparator 510. Here, the address comparator 510 compares the external setting input of the communication control unit 210 with the address value of the operation key scan address generation unit 58, and, for example, from the outside from the address value of the operation key scan address generation unit 58. A signal is output to the OR gate 518 when the setting input is larger or smaller. This function is, for example, to send the operation keys of the part with a large operation key scan address to the NC device 1 without code conversion, or conversely, to the NC without converting the operation keys of the part with a small operation key scan address to code conversion. It is possible to deal with the case of transmitting to the device 1.

Further, the operation board mode changeover switch 212
Is a switch for switching the mode of the entire area, not the area of the scan address like the address comparator 510. Priority encoder 514 is standard logic
This is a priority encoder equivalent to the one normally used as an IC, which encodes the signal of the highest priority in the input 8BIT and outputs 3BIT. Further, the priority encoder 514 outputs a signal for determining the presence / absence of operation key scan input to the data output gate 64. The data output gate 64 is set to a code meaning, for example, no signal when it detects that there is no operation key scan input, that is, all inputs for 8 bits, and that code is NC.
It is sent to the device 1 and the MPU 101 of the NC device 1 recognizes that the operation key input has disappeared.

Here, when the operator finishes the setting by the operation board 3 and sets the NC device 1 in the automatic operation mode to start the operation operation, the operator does not need to operate the operation board 3 in particular. In this case, the operation board 3 is removed. That is, first, the switch input of the operation board removal switch 211 of FIG. 5 or the switch input of the operation board / remote I / O connection device removal switch 110 of the NC unit 1 is performed. By this input, NC from transmitter 52
A transmission frame of a header pattern indicating that there is a request for removing the operation board is transmitted to the device 1, or a signal indicating that there is a request for removing the operation board is input to the NC device 1. In response to this signal, the NC device 1 returns to the connection ID request communication mode which is the initial state.

The operation board 3 can be detached from the NC device 1, and the detached operation board can be connected to another NC device for operation. One operation board can be shared by a plurality of NC devices, resulting in efficiency. To be the target. The operator is
In order to confirm whether or not the operation board removal request is normally recognized by the MPU 101 of the NC device 1, a signal is transmitted from the NC device 1 and the display 108 of the operation board 3 indicates that the operation board can be removed. The indicated display may be displayed, or a similar display may be displayed on the LED attached to the NC device 1.

The operation relating to the configuration of the operation board and the remote I / O communication control method according to the first embodiment shown in FIGS. 1 to 6 will be described focusing on the operation of the operation board. FIG. 7 shows an operation flow of the program S / W processing of the MPU 101 of the NC device 1 according to this embodiment, which corresponds to FIG. 20 of the conventional example. Further, FIG. 8 is a program of input / output to the operation board 3 and the remote I / O 2 in the MPU 101 of the NC device 1.
The operation flow of the S / W processing is shown and corresponds to FIG. 21 of the conventional example. Note that FIG. 8 shows step S of FIG.
5, S6, S7 and S8 are described including the remote I / O processing.

In the conventional system shown in FIG. 20, first, in order to determine the type of the operation board 3, the MPU 101 of the NC unit 1 sends a transmission frame including a status request to the operation board 3 to the operation board 3. . Then, the NC device 1 receives the frame including the status indicating the type of the operation board 3 from the operation board 3 (S1, S
2, S3). On the other hand, in the present embodiment shown in FIG. 7, similarly to the remote I / O 2, the communication control unit 109 on the NC device 1 side and the communication control unit 210 on the operation board 3 side allow the NC device to operate. The status request and the transmission of the status information of the operation board to the NC device 1 are automatically executed without the involvement of the MPU 101 of No. 1. The NC device 1 reads the received data held in the received data holding unit 44 of the communication control unit 109 of the NC device 1 and analyzes it (S4). And in the conventional method,
The operation board 3 side has the MPU 21 and the ROM 23 including the code conversion table corresponding to the operation board, and already holds the data for the code conversion table. However, in the present embodiment, these configurations are Since it does not have it, data transmission processing (S12) for the code conversion table from the NC device 1 to the operation board 3 is required.

The NC device 1 holds the code conversion table data and transfers it from the NC device 1 to the operation board 3. This is because the system S / W of the NC unit 1 changes in various ways depending on the machine tool, but the operation board 3 also changes according to the machine tool, so it is stored in the ROM 102 for storing the system S / W of the NC unit 1 side. This is because the S / W management of the code conversion table data of the operation board 3 together with the system S / W in the NC device 1 enables efficient centralized management of the data.

In both the conventional method shown in FIG. 20 and the present embodiment shown in FIG. 7, steps 5 to 8 (S5 to S
The process 8) is performed by a periodic timer interrupt. Note that the remote I / O 2 is also being processed in the same way when the timer is interrupted. The operation of the periodic timer interrupt will be described with reference to FIG.

In the conventional method for performing the operation flow shown in FIG. 21, NC is provided for each of the operation board 3 and remote I / O 2.
Communication is performed from the device 1 by a separate serial communication I / F, that is, a separate communication control unit and a transmission / reception signal line, and the processing is performed individually. On the other hand, in the method according to the present embodiment that performs the operation shown in FIG. 8, when a timer interrupt occurs, it is first determined whether or not the operation board 3 is connected, that is, the operation board connection state (S64). If the operation board 3 is not connected, it is determined whether or not the extension remote I / O is connected (S65). When the operation board 3 is connected, the operation board input / output processing (S71) is performed, and when the additional remote I / O is connected, the input / output processing (S72) for the additional remote I / O is performed. Run.

Here, the operation board 3 and the remote I / O 2
If neither of these is connected, it is determined whether or not it is in the connected device removal mode (S66). If it is not in the removal mode, alarm processing is performed and the NC operation is stopped (S73). In the removal mode, a message is displayed to notify the operator that the degeneration operation is in progress (S67), and normal remote I / O input / output processing (S6) is performed.
2) The other processing (S63) is executed, and the routine returns from the interrupt processing routine.

FIG. 9 is a flow chart showing a process of transmitting code conversion table data from the NC device 1 side to the operation board 3 in the present embodiment. This process shows the process of step S12 in FIG. 7 in detail. Figure 9
The transmission process of the code conversion table data will be described based on FIG.

First, when the NC device 1 is started up,
The communication control unit 109 of the NC device 1 enters the connection ID request mode.
Then, the transmission frame indicating the connection ID request mode is transmitted to the operation board 3 connected to the NC device 1 without involving the MPU 101 of the NC device 1. After that, information indicating what kind of operation board is transmitted from the operation board 3 that has received the connection ID request mode transmission frame, that is, operation board ID
Receive a received frame containing information. Then, the MPU 101 of the NC device 1 first confirms that the communication control unit 109 is in the connection ID request mode, and analyzes the status of the operation board 3 transmitted from the operation board 3 and held in the received data holding unit 44. Then, the code conversion table corresponding to the operation board 3 is selected according to the analyzed result (S41).

Next, the MPU 101 of the NC device 1 sets the first transmission data having a predetermined transmission length from the code conversion table in the transmission data holding section 43 (S42). The length of this transmission is, for example, 32 BYTES. The total length of the code conversion table is 256 BYTES, for example,
The transmission is completed in eight times. Then, MPU1 of NC device 1
01 sets the code conversion table transfer mode in the communication control unit 109 (S43). Then, the communication control unit 109
The transmission driver IC is enabled, the code conversion table data is transmitted, and the transmission driver IC is disabled (S4
4). These operations are automatically performed by the communication control unit 109.

Next, when the operation board 3 normally receives the code conversion table data, a normal reception response frame is transmitted from the operation board 3 to the NC device 1, and the NC device 1 receives this signal (S45). . After that, MPU101 of NC device 1
However, if it is confirmed by the status of the communication control unit 109 that the first code conversion table data is transmitted to the operation board 3 (S46), the code conversion table data
It is determined whether all 256 BYTEs have been transmitted (S4
7) If not completed, prepare data for the next time (S5
0), and returns to step S43.

In step S47, if the transmission of all 256 BYTEs of the code conversion table data has been completed, the MPU 101 of the NC unit 1 sends the normal transmission data to the transmission data holding unit.
43 (S48), and the MPU 101 of the NC device 1 sets the communication control unit 109 to the normal transmission mode (S49). In this way, the code conversion table data is transmitted from the NC device 1 to the operation board 3, and the transmitted code conversion table data is stored in the code conversion table memory 513.

FIG. 10A is a code conversion table transmission mode control circuit diagram of the operation board 3 on the NC device 1 side used in this embodiment, and FIG. 10B is an explanatory diagram of operation timing. In the figure, 1101 is a transmission frame from the NC device 1 to the operation board 3, 1102 is a transmission frame from the operation board 3 to the NC device 1, and 1103 is eight transmission / reception cycles between the NC device 1 and the operation board 3. And
Transmission is performed in X μsec. 1104 is an operation board code conversion table transmission mode signal on the NC device 1 side, 1105 is a code conversion table data reception completion signal received from the operation board 3, 1106 is an operation board code conversion table transmission mode set signal, and 1107 is The operation board code conversion table data reception completion status.

The operation of transmitting the code conversion table shown in FIGS. 10A and 10B will be described. First,
After the MPU 101 on the NC unit 1 side starts up the system, the operation board 3
Type is analyzed and the code conversion table data corresponding to the operation board 3 is set in the transmission data holding unit 43 of the communication control unit 109 of the NC unit 1 for 32 BYTE, and then the mode set signal is set.
It outputs 1106. When the mode set signal 1106 is input, as shown in FIG. 10 (B), the operation board code conversion table transmission mode signal 11 is sent from the NC device 1 to the operation board 3.
As code 04, the code conversion table data is transmitted at the timing of the transmission frame of N # 0 to N # 7, and the code conversion table data reception completion signal 11 is sent from the operation board 3 to the NC unit 1.
As 05, the reception completion signal is transmitted at the timing of the transmission frame of B # 0 to B # 7. In response to the reception completion signal, the operation board code conversion table data reception completion status 1107 is set.

The timing chart shown in FIG. 10B is a timing chart showing the flow of transmission / reception data between the NC unit 1 and the operation board 3, but the NC unit 1 and the remote I / O 2
The flow of transmitted / received data between them is also executed at the same timing.

FIG. 11A is a code conversion table reception mode control circuit diagram of the operation board 3 on the operation board 3 side used in this embodiment, and FIG. 11B is an explanatory diagram of operation timing. In the figure, 1201 is NC
Transmission frame from device 1 to operation board 3, 1202A, 12
02B is a transmission frame from the operation board 3 to the NC device 1,
1203 is one transmission / reception cycle between the NC device 1 and the operation board 3, and transmission is performed in Y μsec. 1204 is a transmission / reception cycle of 8 times between the NC device 1 and the operation board 3, 1205
Is a code conversion table transmission mode OFF signal detected from the frame received from the NC device 1, 1206 is a normal reception completion pulse signal of the operation board code conversion table data, and 1207 is a normal reception completion of the operation board code conversion table data. A signal, 1208, is a flip-flop for generating the normal reception completion signal 1207.

Further, the transmission frame in FIG. 11 (B)
The symbol inside 1201 shows the data structure of the transmission frame from the NC unit 1 to the operation board 3 for each cycle,
The symbols inside the transmission frames 1202A and 1202B indicate the data structure of the transmission frame from the operation board 3 to the NC device 1. The operation board code conversion table data reception control circuit shown in FIG. 11A corresponds to the code conversion table transfer control unit 519 shown in FIG.

The operation of receiving the code conversion table shown in FIGS. 11A and 11B will be described. First,
On the NC device 1 side, when 32 BYTE of the operation board code conversion table data has been prepared, the NC device 1 is set to the operation board code conversion table transmission mode. When the operation board code conversion table transmission mode is set, a transmission frame indicating the operation board code conversion mode is transmitted from the NC device 1 to the operation board 3. Operation board 3
On the side, the code conversion table transmission mode OFF signal 1205
It changes from HIGH to LOW, and reception of the operation board code conversion table starts.

On the operation board 3 side, when the code conversion table data for 32 BYTE is normally received, the normal reception completion pulse signal 1206 of the operation board code conversion table data is sent.
Generates a LOW pulse and sets the normal reception completion signal 1207 for the operation board code conversion table data. When the normal reception completion signal 1207 of the operation board code conversion table data is set, the transmission frame transmitted from the operation board 3 immediately afterwards to the NC device 1 is a header pattern indicating that the operation board code conversion table has been normally received. Switch to the transmission frame with. Then, the NC device 1 that has received the signal indicating that the normal reception has been completed prepares the code conversion table data for the next 32 BYTE, sets the operation board code conversion table transmission mode again, and repeats the above operation.

Normally, the transfer processing of the operation board code conversion table data from the NC device 1 to the operation board 3 must be performed before the normal transmission mode is set. Therefore, the data BDID # 0 to BDID # 3 when the NC device 1 is in the connection ID request mode are included in the frame of the transmission frame 1202A. However, if it is desired to check whether the operation board code conversion table data has been transferred from the NC device 1 to the operation board 3 with certainty, the transmission frame 1202
As shown in B, operation board code conversion table data
Loop back from CODE # 0 to CODE # 3, and from the operation board 3
The data may be transferred to the NC device 1 and stored in the reception data holding unit 44 on the NC device 1 side, and the MPU 101 on the NC device 1 side may compare the contents with the contents of the transmission data holding unit 43.

FIG. 12 shows a transmission / reception frame between the NC device 1 and the remote I / O 2 used in this embodiment, NC.
3 is a configuration diagram of a transmission / reception frame between the device 1 and the operation board 3. FIG. In the figure, 1301 is a transmission frame from the NC device 1 to the remote I / O 2 in the normal transmission mode, 1302 is a transmission frame from the remote I / O 2 to the NC device 1 in the normal transmission mode, and 1303 is a connection ID. A transmission frame from the NC device 1 to the remote I / O 2 in the connection ID transmission mode in the request mode, 1304 indicates a frame from the remote I / O 2 to the NC device 1 in the connection ID transmission mode in the connection ID request mode. Indicates a transmission frame.

Reference numeral 1305 denotes the NC device 1 in the normal transmission mode.
To the operation board 3, 1306 is a transmission frame from the operation board 3 to the NC device 1 in the normal transmission mode, and 1307 is the NC device 1 to the operation board 3 in the connection ID transmission mode in the connection ID request mode. 1308 shows a transmission frame from the operation board 3 to the NC device 1 in the connection ID transmission mode in the connection ID request mode. Each of these frames has the same data structure in the frame, but shows different header patterns and individual data contents. SADR shows the header pattern. With such a frame configuration,
Since the data structure is the same for each frame, NC device 1
Also, the timing control of the remote I / O 2 and the communication control unit of the operation board 3 is facilitated.

FIG. 13 is an explanatory diagram for explaining header patterns transmitted by the communication control units of the NC device 1, remote I / O 2 and operation board 3. Although 16 bits are used as the header pattern, in the 16-bit header pattern, FF00 to FFO7 are normally transmitted from NC unit 1 to remote I / O 2 or from NC unit 1 to operation board 3. Used at times. Also, from 4900 to 4907, NC
Used in the connection ID request communication mode when transmitting a connection ID request frame from the device 1 to the remote I / O 2 or the NC device 1 to the operation board 3. In addition, NC from 4C00 to 4C07
Used when sending a loopback mode from the device 1 to the remote I / O 2 or from the NC device 1 to the operation board 3. Also,
5400 to 5407 are used in the code conversion table transmission mode from the NC device 1 to the operation board 3.

Further, 5200 is a header pattern for a response at the time of normal reception of remote I / O from each remote I / O 2 to the NC unit 1, and 4500 is a remote I / O 2 from the remote I / O to the NC unit 1. / O Used as a header pattern for the response when a reception error occurs. Further, 4A00 is used as the header pattern of the transmission frame to the NC device 1 when the remote I / O removal switch 39 on the remote I / O 2 side is operated and a signal is input, and the removal of the operation board on the operation board 3 side is performed. NC device 1 when switch 211 is operated and a signal is input
Used as the header pattern of the transmission frame to the. Further, 4200 is a header pattern for a response when the operation board 3 normally receives from the operation board 3 to the NC device 1, and 6500 is a header pattern for a response when an operation board reception error from the operation board 3 to the NC device 1 occurs, 4600 is assigned to the header pattern for one operation board code conversion table normal reception completion response from the operation board 3. The above-mentioned header pattern shows an example of the header pattern, and a 16-bit header pattern may be appropriately allocated according to each application.

When the method of using the header patterns of various transmission frames used in this embodiment is arranged, when transmitting from the NC device 1, there are the following four types. Normal transmission mode FF00 to FF07 Connection ID request communication mode 4900 to 4907 Loopback mode 4C00 to 4C07 Operation board code conversion table transmission mode 5400 to 5407 Also, when transmitting from remote I / O 2, there are the following three types. Normal reception 5200 CRC error occurrence 4500 Remote I / O removal mode 4A00 Also, when transmitting from the operation board 3, there are the following 4 types. Normal reception 4200 CRC error 6500 Operation board code conversion table for 1 time Completion of normal reception 4600 Operation board removal mode 4A00 The header pattern shown in Fig. 13 is 16BIT.
However, any number of BITs may be used.

Here, the operation board 3 or each remote I / O
Regarding the transmission from O 2 to the NC device 1, after the NC device 1 transmits to the specific remote I / O 2 or the operation board 3, the reception frame transmitted in response to this, and the reception frame received by the NC device 1 is specific. Since the reception from the remote I / O 2 or the operation board 3 can be automatically recognized, the header pattern can be made common to all the remote I / Os or the operation boards. In addition, the transmission of the loopback mode header pattern from the NC device 1 is used to determine whether the NC device 1 and the operation board 3 or the remote I / O 2 are normally connected. It is effective when used at times.

FIG. 14 shows the NC device 1 according to this embodiment.
FIG. 3 is a diagram showing a flow of a transmission / reception frame between the operation board 3 and the remote I / O 2. In the figure, 1501 is a transmission frame from the NC device 1 to the operation board 3 or the remote I / O 2, 1502 is a transmission frame from the remote I / O 2 to the NC device 1, and 1503 is a operation frame from the operation board 3 to the NC device. It is a transmission frame to 1.

Further, 1504 is an operation board 3 and a remote
I / O 2 side transmission ON signal, 1505 is a transmission ON signal of the communication control unit on the NC device 1 side, 1506 is each transmission frame (N # 0) of the NC device 1, operation board 3, and remote I / O 2 ~ N # 7, R # 0 ~ R #
7 shows the data structure of B # 0 to B # 7).

Reference numeral 1507 indicates a cycle interval for executing transmission / reception with all remote I / O 2 which is supposed to be connected to the NC device 1, and 1508 indicates the NC device 1 and the operation board 3.
It also indicates a unit transmission / reception cycle for executing transmission / reception with each remote I / O 2. Transmission frame data structure 1506
In this frame format, FLAG is a pattern that indicates a frame boundary, ADR1 and ADR2 are header patterns,
DATA # 0 to DATA # 3 are information areas including data transmitted by the NC device 1, the operation board 3, and the remote I / O 2, and CRC is a check code added to detect a frame error. The header patterns ADR1 and ADR2 are used to identify each remote I / O 2, normal / connection ID request mode, NC
Used to specify the code conversion table transfer mode from the device 1 to the operation board 3, the loopback mode, and to identify the presence / absence of CRC error in the transmission from the NC device 1 to the operation board 3 and each remote I / O 2. .

In the embodiment configured as described above, when the power is turned on, the serial communication port of the NC device 1 main body is
A mode for automatically monitoring the connection ID status of the connected device is automatically set, and a connection ID request communication frame having information notifying that the connection ID status is in the request mode for the connection ID status is displayed on the operation board 3 or each To the remote I / O 2, the MPU 101 of the NC unit 1 will automatically transmit by the H / W timer without involvement, and MP will be sent to the operation board 3 side.
The configuration such as U and ROM is not required, and the configuration can be simplified.

The operation board 3 or remote I / O 2 connected to the serial communication port of the NC device 1 has a header pattern indicating the type of operation board 3 or remote I / O 1 for the NC device 1. In the case of the operation board 3 and the remote I / O 2, the data of the transmission frame in the normal communication mode is transmitted to the NC device 1 by discriminating the reception frame. To be different. Both the operation board 3 and the remote I / O 2 have the same transmission / reception frame length and transmission / reception timing. Therefore, the communication control unit on the NC device 1 side and the communication between the operation board 3 and the remote I / O 2 side The control unit can be realized with a simple configuration.

Further, the operation board 3 or each remote I / O
On the O 2 side, as long as the header pattern of the communication frame transmitted from the NC unit 1 main body indicates the connection ID request mode, the ID information for each operation board 3 or each remote I / O 2 station is sent to the NC unit 1 main unit. Send to. This ID information includes a connection ID status code indicating the types of the operation board 3 and the remote I / O 2, and the communication control unit 109 of the NC device 1 is sent from the operation board 3 or the remote I / O 2. The connection ID status code is held in the received data holding unit 44, and the NC device 1
The MPU 101 reads out the contents to confirm which of the operation board 3 and the remote I / O 2 is connected to the serial communication port, and thereafter, the operation board 3 or the remote I / O connected to the NC device 1. The operation corresponding to 2 is performed.

On the NC device 1 side, immediately after transmission to the operation board 3 or each remote I / O 2 side, the operation board 3 is sent.
Or, if the response signal is not received from each remote I / O 2, it is judged that the corresponding operation board 3 or remote I / O 2 is not installed, and the system operation as NC device 1 is not started. After the connection is confirmed, the operation as the NC device 1 is performed.

Further, in the mode in which the NC device 1 and the operation board 3 are connected, if the operator does not perform an operation to give a notice to remove the operation board 3 and the communication is disconnected, the NC device 1 outputs an alarm. By recognizing and notifying the operator by the LED display attached to the NC device 1 side or the display attached to the operation board 3, the operator can surely recognize the communication disconnection state.

Embodiment 2 of the Invention FIG. 15 is a diagram showing another configuration of the operation board / remote I / O communication control method according to the present invention.
A plurality of shared communication control units 109 are provided, and a plurality of operation boards 3,
It is a NC system block diagram at the time of using remote I / O2. As described above, in the configuration shown in FIG. 15, by providing a plurality of operation board / remote I / O shared communication control units 109, a system having a plurality of operation boards 3 can be easily configured, and the operation boards can be halfway The effect is that even if the system is changed so that 3 is made single and remote I / O 2 is added, it can be easily handled.

[0097]

As described above, in the operation board and remote I / O communication control method according to the present invention, the operation board or remote I / O attached to the control device connected to the control device for machine control of the machine tool. Operation board with O,
A remote I / O communication control method for transmitting / receiving data between a control device and an operation board and for controlling the control device and remote I / O.
Since the data transmission and reception between the two devices are performed with the same frame length and the same communication cycle, it is possible to unify the communication control between the control device, the operation board, and the remote I / O.
This has the effect of simplifying control. Also, when removing the operation board from the control unit, when operating the operation board removal switch on the operation board or the connected device removal switch on the control unit, or when removing the remote I / O from the control unit. Connected equipment removal switch or remote I /
When the remote I / O removal switch provided on the O is operated, the communication control unit of the control unit sends a communication frame for recognizing the type of the operation board to be connected, so the NC device to which the operation board is connected is connected. Or, in the NC device to which the remote I / O is connected, after the operator removes the operation board or the remote I / O, the NC device does not stop the system and continues the system operation as it is.
This has the effect of enabling reconnection of the operation board and remote I / O.

Further, the control device is an operation board / remote I
It has an I / O shared communication control unit, and an operation board or remote I
Since / O can be switched and connected to the control board operation board / remote I / O shared communication control section, the NC board operation board connection communication control section and the remote I / O communication control section are shared. This makes it possible to increase the flexibility of the system configuration by eliminating the need for an additional communication control unit when connecting additional remote I / O.

Further, the control device is an NC device, and when data is transmitted and received between the NC device and the operation board, display data is transmitted from the NC device to the display part of the operation board, and the operation board is transmitted from the operation board to the NC device. Since the operation key input data of is transmitted, there is an effect that the NC device and the operation board can be easily transmitted and received.

Further, since the frames transmitted from the operation board or remote I / O to the NC unit have different identification codes, it is easy to determine which of the operation board or remote I / O is connected to the NC unit. There is an effect that.

Further, since the address signal when scanning and reading the operation key input data of the operation board depends on the identification code of the frame transmitted from the NC unit to the operation board, it is special for the operation board side. H / W, for example
There is no need to install an MPU, ROM, etc., which simplifies the device configuration and has the economical effect of reducing the system configuration cost.

Since the operation key input data of the operation board is transmitted to the NC device in response to the frame transmission from the NC device to the operation board, the operation key scan input from the operation board to the NC device is performed. When sending data,
There is an effect that the H / W on the operation board side can be easily configured without adding special information to the transmission frame.

Further, the communication control section of the NC device, which is the control device, transmits a communication frame for recognizing the type of the operation board to be connected to the operation board, and the connected operation board sends the information indicating the type to the NC. The NC device sends the code conversion table data corresponding to the operation key input data of the operation board to the operation board based on the sent information and stores it in the memory of the operation board.
Conventionally, the code conversion table data that each operation board had individually can be collectively managed as data on the NC device side, and there is an effect that the data can be handled easily. In addition, since the operation board has a code conversion table for inputting operation keys and the code is converted by H / W, the MPU is installed on the operation board side, and the code conversion S / W processing by the MPU is not required and the operation is performed. S / W development of the board becomes unnecessary, and if there is a test device that simulates the operation board code conversion data transfer process of the NC device in the product shipping test, the test operation can be performed with the operation board alone. .

When a frame is transmitted from the NC device to the operation board and a plurality of operation keys are operated when scanning and reading the operation key input data of the operation board, the communication control unit on the operation board side is A mode in which the priority operation key is extracted and the code is converted by the code conversion table data stored in the memory of the operation board and transmitted to the NC device.
Since there is a mode in which the operation key input data is sent to the NC device as it is, each operation key is prioritized as an operation key input, and only the operation key input that has been operated with the highest priority is input to the NC device. If you want to send to
All operation key input information at the time of one operation key scan
Can support both modes when sending to NC equipment,
It is possible to switch between the two modes depending on the state of the operation key scan signal, which has the effect of being compatible with various operation boards.

Further, the code conversion table data transmitted from the NC unit is transmitted from the NC unit to the operation board in a plurality of divided frames, and the address of the memory in which the code conversion table data is stored is the identification code of the frame. Since it is made dependent, the code conversion table data can be sent to the operation board and the station number of the remote I / O can be specified, while taking advantage of the high-speed processing by the short send / receive frame used in remote I / O. Since the change in the header pattern of the transmission frame from the NC device can be shared for the designation of the code conversion memory storage address on the operation board side, there is an effect that the circuit configuration on the operation board side becomes simple.

Also, every time the code conversion table data transmitted from the NC unit in a plurality of frames is normally transmitted a predetermined number of times, the operation board transmits a frame having an unusual identification code to the NC unit. Since it is possible to judge from the transmission frame from the operation board that the code conversion table data was normally transferred from the NC device to the operation board, there is an effect that erroneous code conversion does not occur on the operation board side. is there.

Further, when the code conversion table data is divided into a plurality of frames and transmitted from the NC unit, the identification code of the frame is transmitted by using an identification code different from the normal one to ensure normal transmission of the code conversion table data. When the NC device receives the frame to be confirmed from the operation board, the identification code of the frame transmitted from the NC device is restored to the normal identification code, so that the transfer of the code conversion table data between the NC device and the operation board can be performed. There is an effect that the handshake can be surely performed.

Further, the address for displaying on the display section of the operation board depends on the identification code of the frame of the display data transmitted from the NC device to the operation board on the display section. It is possible to use the transmission frame header pattern from the NC device, which was changed to select the station number of the remote I / O, for the output address signal of the display part such as LED, and to use a special H / W on the operation board side. It is not necessary to provide the element, and the configuration is simple.

[Brief description of drawings]

FIG. 1 is a configuration diagram showing an example of a configuration of an operation board and a remote I / O communication control method according to the present invention.

FIG. 2 is a diagram showing a schematic configuration of an operation board and an operation board used in a remote I / O communication control method according to the present invention.

FIG. 3 is a diagram showing a schematic configuration of a remote I / O.

FIG. 4 is a diagram showing a schematic configuration of an operation board communication control unit on the NC device side used in the operation board and remote I / O communication control method according to the present invention.

5 is a diagram showing details of the internal configuration of an operation board communication control unit of the operation board shown in FIG.

6 is an operation explanatory view for explaining an operation of a code conversion unit which constitutes the operation board communication control unit shown in FIG.

FIG. 7 is a program of the MPU of the NC device according to the present embodiment.
It is a flow chart which shows the operation flow of S / W processing.

FIG. 8 is a flowchart showing an operation flow of a program S / W process of input / output to / from an operation board and remote I / O in the MPU of the NC device according to the present embodiment.

FIG. 9 is a flowchart showing a process of transmitting code conversion table data from the NC device to the operation board in the present embodiment.

FIG. 10A is a code conversion table transmission mode control circuit diagram of the operation board on the NC device side used in the present embodiment, and FIG. 10B is an explanatory diagram of operation timing.

FIG. 11A is a code conversion table reception mode control circuit diagram of the operation board on the operation board side used in the present embodiment, and FIG. 11B is an explanatory diagram of operation timing.

FIG. 12: NC device and remote used in this embodiment
FIG. 3 is a configuration diagram of a transmission / reception frame between I / O and a transmission / reception frame between an NC device and an operation board.

FIG. 13 is an explanatory diagram of header patterns transmitted by the communication control units of the NC device, the operation board, and the remote I / O.

FIG. 14 is a diagram showing a flow of transmission / reception data of a transmission / reception frame between the NC device and the operation board or remote I / O in the present embodiment.

FIG. 15 is a configuration diagram showing another example of the configuration of the operation board and remote I / O communication control method according to the present invention.

FIG. 16 is a configuration diagram showing a configuration of a conventional operation board and remote I / O communication control method.

FIG. 17 is a configuration diagram showing a schematic configuration of a conventional operation board.

FIG. 18 is a configuration diagram showing a schematic configuration of a conventional remote I / O.

FIG. 19 is a configuration diagram showing a schematic configuration of a conventional operation board communication control unit on the NC device side.

FIG. 20 is a flowchart showing an operation flow of a program S / W process of the MPU of the conventional NC device.

FIG. 21 is a flowchart showing an operation flow of a program S / W process of input / output to / from an operation board and remote I / O in the MPU of the conventional NC device.

FIG. 22: Program S / of the conventional MPU on the operation board side
It is a flowchart which shows the operation | movement flow of W process.

[Explanation of symbols]

1 NC controller main body 2 Multiple remote I / O 3 Operation board attached to NC controller main body 4 Servo amplifier / spindle amplifier 5 Servo motor, spindle motor, encoder 101 NC device side control MPU 102 NC device MPU operation program storage ROM 103 NC unit MPU operation work area RAM 104 NC unit operation board communication control unit 105 NC unit remote I / O communication control unit 106 NC unit servo / spindle communication control unit 107 Operation key switches on the operation board 108 LED display on the operation board 109 Operation board / remote I / O shared communication control unit 110 Operation board / remote I / O connection device removal switch 111 NC device, remote I / O transmission / reception signal line 112 NC device, operation Transmission / reception signal line between boards 113 Transmission / reception signal line between NC device and servo amplifier / spindle amplifier 21 Operation board control MPU 22 Operation board communication controller 23 Operation board operation S / W storage ROM 24 Operation board RAM for the MPU operation work area of the controller 25 Operation board LED output holding section 26 Operation board SCAN address generation section 27 Operation board SCAN data input section 28 Operation board LED / switch matrix 29 Operation board selection switch 210 Operation board communication control section 211 Operation Board removal switch 212 Operation board mode selector switch 122 Remote I / O → NC device transmission signal line 123 Transmit / receive signal line between NC device and remote I / O 31 Remote I / O → NC device transmission section 32 NC device → Remote I / O receiver 33 Remote I / O transmission data holder 34 Remote I / O reception data holder 35 Remote I / O input signal filter 36 Remote I / O output signal holder 37 Remote I / O reception alarm detector 38 Remote I / O station number setting rotary switch 39 Remote I / O removal switch 41 NC transmitter 42 NC receiver 43 Transmission data holding unit 44 Reception data holding unit 45 Transmission start command Control unit 46 Transmission status control unit 47 Reception start command control unit 48 Reception status control unit 49 Transmission start H / W timer 410 Transmission mode switching control unit 411 Operation board code conversion table Transmission mode control unit 51 Operation board reception unit 52 Transmission unit 53 Received data holding unit 54 Transmitted data holding unit 55 Operation board LED output data output unit 56 LED output address generation unit 57 LED output data write pulse generation unit 58 Operation key scan address generation unit 59 Operation key scan data input unit 510 Address comparator 511 Reception data counter 512 Code conversion table writing control unit 513 Code conversion table memory 514 Priority encoder 515 Code conversion unit 516 Multiplexer 517 Reception frame counter 518 OR gate 519 Code conversion table transfer control unit 61 Normal mode Code conversion table input address 62 Multiplexer 63 Code conversion table Bull write mode Input address 64 Data output gate 1101 Transmission frame 1102 Transmission frame 1103 Transmission / reception cycle between NC device and operation board 1104 NC device operation board code conversion table transmission mode signal 1105 Reception of code conversion table data received from operation board Completion signal 1106 Operation board code conversion table transmission mode set signal 1107 Operation board code conversion table Data reception completion status 1201 Transmission frame data structure 1202A Transmission frame data structure example 1202B Transmission frame data structure example 1203 NC device, operation board Single transmission / reception cycle between 1204 NC device and operation board 1205 Code conversion table transmission mode OFF signal 1206 Operation board code conversion table normal reception completion pulse signal 1207 Operation board code conversion table normal reception completion signal 1208 Flip flag ROP 1301 Transmission frame from NC unit to remote I / O in normal transmission mode 1302 Transmission frame from remote I / O to NC unit in normal transmission mode 1303 From NC unit to remote I / O in connection ID request mode Transmission frame 1304 Transmission frame from remote I / O to NC unit in connection ID request mode 1305 Transmission frame from NC unit to operation board in normal transmission mode 1306 Transmission frame from operation board to NC unit in normal transmission mode Frame 1307 Transmission from NC unit to operation board in connection ID request mode Frame 1308 Transmission from operation board to NC unit in connection ID request mode 1501 Transmission from NC unit to operation board or remote I / O frame 1502 Remote Transmission frame 1503 from I / O to NC unit Transmission frame from operation board to NC unit 1504 Transmission ON signal on operation board and remote I / O side 1505 Transmission of NC unit side communication controller Signal ON signal 1506 Data structure of each transmission frame of NC device, operation board, remote I / O 1507 Cycle interval for transmission / reception 1508 Unit transmission / reception cycle for transmission / reception

Claims (12)

[Claims] 1. A control board connected to a control device for machine control of a machine tool, an operation board having a remote I / O, or a remote I / O communication control method, comprising: Data is sent and received between the control board and the operation board, and data is sent and received between the control device and remote I / O at the same communication cycle with the same frame length. Provided to the control device when the operation board removal switch provided on the operation board or the connected device removal switch provided on the control device is operated, or when the remote I / O is removed from the control device. When the connected device removal switch or the remote I / O removal switch provided on the above remote I / O is operated, the communication control unit of the control unit is not connected. Operation board, remote I / O communication control method characterized by transmitting a communication frame for recognizing the type of the operation board to be. 2. The control device is an operation board / remote I / O.
Has a shared communication control unit, operation board or remote I / O
The control board and remote I / O communication control method according to claim 1, wherein the control board and the remote I / O communication control section are switchably connectable. 3. The control device is an NC device, and when data is transmitted and received between the NC device and the operation board, display data is transmitted from the NC device to a display unit of the operation board, and the operation board is operated by the operation board. 3. The operation board and remote I / O communication control method according to claim 1, wherein the operation key input data of the operation board is transmitted to the NC device. 4. The operation board according to claim 1, wherein frames transmitted from the operation board or the remote I / O to the NC device have different identification codes. Remote I / O communication control method. 5. The address signal for scanning and reading the operation key input data of the operation board depends on the identification code of the frame transmitted from the NC device to the operation board. Or the operation board and remote I / O communication control method described in item 4. 6. The operation according to claim 5, wherein operation key input data of the operation board is transmitted to the NC device in response to a frame transmitted from the NC device to the operation board. Board, remote I / O communication control method. 7. The communication control section of the NC device, which is a control device, transmits a communication frame for recognizing the type of the operation board to be connected to the operation board, and the connected operation board indicates the type. Is sent to the above NC device and the above NC
The apparatus transmits the code conversion table data corresponding to the operation key input data of the operation board to the operation board based on the transmitted information and stores the code conversion table data in the memory of the operation board. The operation board or remote I / O communication control method according to any one of item 6. 8. The communication control unit on the operation board side, when a frame is transmitted from the NC device to the operation board and a plurality of operation keys are operated when scanning and reading the operation key input data of the operation board, A mode in which the highest priority operation key is extracted and the code is converted by the code conversion table data stored in the memory of the operation board and transmitted to the NC device, and a mode in which the input data of the operation key is directly transmitted to the NC device. The operation board and remote I / O communication control method according to claim 7, further comprising: 9. The code conversion table data transmitted from the NC device is transmitted from the NC device to the operation board in a plurality of divided frames, and the address of the memory in which the code conversion table data is stored is the frame 9. The method according to claim 7 or 8, which depends on the identification code.
Operation board and remote I / O communication control method described in paragraph. 10. The operation board sends a frame having a different identification code to the NC device each time the code conversion table data transmitted from the NC device in a plurality of frames is normally transmitted a predetermined number of times. The operation board and remote I / O communication control method according to claim 9, wherein the operation board is transmitted. 11. When the code conversion table data is divided into a plurality of frames and transmitted from the NC unit, the identification code of the frame is transmitted by using an identification code different from the normal code, and the normality of the code conversion table data is transmitted. When the NC device receives a frame to confirm the transmission from the operation board,
11. The operation board and remote I / O communication control method according to claim 10, wherein the identification code of the frame transmitted from the NC device is restored to a normal identification code. 12. The address for displaying on the display unit of the operation board depends on the identification code of the frame of the display data on the display unit transmitted from the NC device to the operation board. Item 3. The operation board and remote I / O communication control method according to any one of items 3 to 11.