JP2009097267A - Electric opening/closing system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To exclude unnecessary communication and surely perform communication in an electric opening/closing system. <P>SOLUTION: A plurality of opening/closing devices 2 are connected to a cable 3 allowing two-way communication, opened and closed according to a received operation signal, and transmitting an answer signal to answer the state. Each of the opening/closing devices comprises an individual number switch 22 for inputting an individual number for uniquely identifying itself beforehand. A microcomputer 21 determines an answer start timing at which the transmission of the answer signal is started individually for each individual number after a specified time is elapsed after a transmission signal is absent in the cable 3. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to an electric opening / closing system, and in particular, a plurality of opening / closing devices such as an electric blind, an electric shutter, and an electric curtain that are driven and controlled via an electric motor, and a control device that opens and closes these opening / closing devices and manages the state. It is related with the electric switching system which consists of.

  Currently, multiple electric blinds are controlled intensively so that the height and blade angle of each blind are appropriate in terms of both lighting and cooling / heating efficiency. Electric blind systems are commercially available to help maintain the aesthetics.

  For the purpose of ensuring that the height of the blinds and the angle of the blades are set to appropriate values and that the blinds are aligned as described above, Patent Document 1 discloses that an operation signal is transmitted continuously several times. An electric blind system that ensures a reliable opening and closing operation is shown.

  In other words, even if a situation occurs in which the operation signal is not reliably transmitted to the blind due to interference or the like, the probability that the opening / closing operation is surely performed is increased by continuously transmitting the operation signal multiple times.

  In order to realize a more reliable opening and closing operation, the state such as the height is transmitted as an answer signal from each blind so that the central controller always recognizes the state of each blind and re-operates if necessary. In order to perform reliable communication, blind systems that employ a polling system in which a central controller calls one by one are commercially available.

That is, since there is always only one answer signal from each blind, the answer signals do not interfere with each other, and reliable communication is ensured.
JP 9-195644 A

  However, transmitting the operation signal continuously a plurality of times means that if there is an operation from another controller in the middle of transmitting a plurality of times, it is invalidated by the next operation signal that is continuous, There is a problem in that re-operation by another controller may occur. In severe cases, there is also a risk that re-operations will be repeated.

  Also, calling one by one from the central controller and checking the status of all devices at all times means that the communication line is always in a busy state with a signal, so that other controllers avoid interference. Therefore, there is a problem that the operation start is delayed with respect to the operation and the operability is deteriorated.

  In particular, in the case of a blind with little change in state, the answer information by polling usually continues with the same information, and the communication method is wasteful.

  Therefore, an object of the present invention is to provide an electric opening / closing system that realizes a reliable opening / closing operation with good operability by eliminating unnecessary communication and performing reliable communication.

  An electric switching system according to an aspect of the present invention is connected to a transmission path capable of two-way communication, opens and closes in accordance with a received operation signal, transmits a reply signal, and transmits a reply signal, and a transmission A control device that is connected to the road and transmits an operation signal to open and close the plurality of opening and closing devices, and receives an answer signal and manages a state.

  Each of the plurality of switchgears has a number input means for inputting a device number for uniquely identifying itself in advance, and a response start for starting transmission of a response signal after a certain period of time has elapsed since there is no transmission signal in the transmission path Answer start timing determining means for determining the timing, and the answer start timing determining means varies the answer start timing for each device number input by the number input means.

  Accordingly, since the response start timing is determined so as not to overlap each device number after a certain time after the transmission line signal is not present, the response signals do not interfere with each other and reliable communication is ensured.

  Preferably, each of the plurality of switchgears further includes a timer, and the answer start timing determining means is a predetermined period within a predetermined length after a predetermined time has elapsed after the timer has detected that no transmission signal is present in the transmission path. The timing is determined as the answer start timing, and the start timing of the period of the predetermined length differs for each device number input by the number input means.

  Therefore, the answer start timing is always a predetermined timing in the width of the predetermined length period. This makes it possible to avoid interference between adjacent switchgears even if there is a deviation in the detection of the “no transmission signal in the transmission path due to the timer of each switchgear and the lapse of a fixed time”.

  Preferably, a device number is assigned to each of the plurality of switching devices in order from a minimum value to a maximum value of the device number, and the device number to be assigned next to the maximum device number is the minimum device number.

  Therefore, since the response start timing is repeatedly assigned to each switching device, it is possible to reliably transmit (reply) the response signal to the control device.

  Preferably, each of the plurality of switching devices further includes first receiving means for receiving, from the transmission path, an operation signal transmitted from the control device to the transmission path and an answer signal transmitted from the plurality of switching apparatuses to the transmission path. The answer start timing determining means calculates the answer start timing using the elapsed time since the reception of the signal by the first receiving means and its own device number.

  Preferably, the control device receives, from the transmission line, an operation signal transmitted from the control device to the transmission line and answer signals transmitted from the plurality of switching devices to the transmission line, and a second reception unit. The operation start possible timing determining means for determining the operation start possible timing for starting transmission of the operation signal to the transmission line based on the elapsed time after the reception of the signal is completed.

  Preferably, the answer signal includes the device number of the switching device that is the transmission source of the answer signal, and the answer start timing determining means is included in the received answer signal when the answer signal is received by the first receiving means. The response start timing is calculated using the initial device number indicated by the device number, the elapsed time since reception of the response signal by the first receiving means, and the own device number.

  Preferably, the initial device number used for calculating the response start timing indicates the device number next to the device number included in the received response signal.

  Further preferably, when the device number included in the received answer signal indicates the maximum device number assigned to the plurality of switchgears, the next device number is the minimum value assigned to the plurality of switchgears. Specify the device number.

  Therefore, response signals are sequentially transmitted in the order of device numbers after a certain period of time when there is no transmission line signal, and there is no need for unnecessary standby. Communication is ensured, and communication without waste is ensured.

  Preferably, when the opening / closing operation is started in accordance with the operation signal, the response signal is determined when the operation signal or the response signal is received by the first receiving means until the operation is completed and a predetermined time has elapsed from the end of the reception. Transmit according to the start timing.

  Accordingly, since the answer signal is transmitted after a predetermined time from the reception of the operation signal until the answer signal is transmitted after the opening / closing operation is controlled, there is no interference with the answer signal from the adjacent switch device. This ensures reliable communication.

  Preferably, each of the plurality of opening / closing devices is set with an answer signal transmitting means for outputting an answer signal indicating the state after the opening / closing operation according to the operation signal received by the first receiving means to the transmission line, and an operated device number. Device number setting means, driving means for performing an opening / closing operation in accordance with an operation signal, and detecting means for detecting a state after the opening / closing operation by the driving means, and detecting means at the end of the opening / closing operation by the driving means In response to the response start timing, transmission of a response signal including the state detected by the above and the device number set by the device number setting means is started.

  Preferably, in the electric opening and closing system, the timing at which the operation signal from the control device can be started precedes the answer start timing.

  Therefore, since the operation signal starts to be transmitted before the response signal from the switchgear, it is possible to transmit the operation signal reliably without causing interference with the response signal and to wait for a plurality of response signals. Therefore, since the operation signal is transmitted immediately, a comfortable operability with no operation start delay is ensured.

  According to the invention, since the response start timing is determined so that there is no overlap for each device number after a certain period of time when there is no transmission line signal, the response signals do not interfere with each other and reliable communication is ensured. Is done.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
In this embodiment, a blind that achieves an opening and closing function by moving up and down is illustrated as an opening and closing device. However, the present invention is not limited to the blind, and the curtain, shutter, door, or the like is used as an electric curtain device, an electric shutter device, or an electric device. It can also be provided as a door device. In the present embodiment, the signal transmitted for the purpose of explanation is treated as a character. However, since the content of communication (type of operation signal) is not a character (ASCII code or the like) in reality, the numerical value (8 Bit values: 00h to FFh) are adopted.

  FIG. 1 is a schematic configuration diagram of an electric blind system according to an embodiment of the present invention. The electric blind system of FIG. 1 includes blind devices 2a to 2e and a control device 1 connected in a bus-like manner (bidirectional communication is possible) via the same wiring 3 that is a signal transmission path.

  In the present embodiment, the control device 1 simultaneously receives a signal (an operation signal described later) transmitted by itself to the wiring 3, and similarly, each of the blind devices 2a to 2e also transmits a signal (described later) to the wiring 3. Response signal) at the same time.

  Note that the wiring 3 is assumed to comply with the RS485 standard (for example, the communication speed is 9600 bps). Communication standard RS485 has the following characteristics when compared with RS232C.

  RS485 adopts a balanced transmission system, and even if the transmission waveform is distorted, the data signal can be detected if there is a slight differential input voltage, and further, a twisted pair cable is used for the wiring 3 that is a transmission line. Because of its characteristics such as being resistant to noise, long-distance and high-speed transmission is possible.

  The RS485 standard is composed of a balanced transmission circuit, and is capable of high-speed and long-distance data transmission with a maximum transmission speed of 10 Mbit / s and a maximum transmission distance of 1200 m. Further, the power supply voltage of the driver IC can be 5 V of a normal electronic circuit.

  On the other hand, the RS232C standard is composed of an unbalanced transmission circuit, is defined as a maximum transmission distance of 15 m, a transmission speed of 20 Kbit / s or less, and in order to obtain a high noise margin, the driver output voltage is It is necessary to swing positively and negatively in the range of ± 5 to ± 15, and the electronic circuit becomes complicated.

  RS485 has the advantage that communication between multiple devices can be realized with one set of transmission lines by employing multiplex multipoint transmission. In other words, the RS485 standard makes up a party line with one set of transmission lines, and a maximum of 32 drivers and receivers can be connected. In addition, the receiver characteristics have been improved since the establishment of the standard, and a maximum of 256 units can be connected at present. Normally, in a blind system, a party line is formed by one transmission line for each floor, and this maximum of 256 units is an appropriate value.

  On the other hand, the RS232C standard presupposes communication between a set of devices, and when communicating with a plurality of devices, each requires a transmission line.

  Thus, since the wiring 3 of the present embodiment conforms to the RS485 standard, a blind system having the above-described effects can be configured.

  In the present embodiment, only four blind devices 2 a to 2 e are described, but it is assumed that a maximum of 255 blind devices can be connected to the wiring 3. Further, each of the blind devices 2a to 2e is assigned in advance with individual numbers “1” to “255”, which are different device numbers, in order to be able to uniquely recognize itself. Here, “1”, “2”, “3”, and “255” are assigned to the blind devices 2a, 2b, 2c, and 2e, respectively.

  Moreover, although the control apparatus 1 is described as one unit, an operation controller limited to only the operation function can be incorporated in the blind system by connecting to the blind apparatuses 2a to 2e, For the sake of brevity, only the control device 1 is shown.

  In addition, in the case where 255 units exemplified by the blind devices 2a to 2e are moved up and down, it is possible to configure a group consisting of any plurality of units, and together with these group unit lifting and lowering operations, the individual numbers described above are used. It is also possible to carry out a lifting operation for each specified one. However, in the present embodiment, for the sake of brevity, the description will be limited to the lifting operation limited to the designation of all devices.

  Note that the lifting operation time from the upper limit position to the lower limit position varies depending on the lifting speed and the lifting range length, but in general, constant speed control may be performed. Become. In the present embodiment, it is assumed that the lifting operation time in the lifting range is about 35 seconds.

  In the system shown in FIG. 1, the blind devices 2 a to 2 e are moved up and down from the control device 1, and the updated height information is transmitted as an answer signal when the blind devices 2 a to 2 e are stopped. From the answer signal, it is possible to grasp the height information of each of the blind devices 2a to 2e and determine whether the blind devices 2a to 2e are stopped at the desired height or not stopped at the desired height. And it is also possible to call out more detailed information, such as whether to stop for obstacles, to notify these discrimination data, or for equipment that has not stopped at the desired height, Alternatively, it is possible to send the lifting operation signal again to ensure the desired height, and there are various management modes.

  However, in this embodiment, for the sake of brevity, the management mode will be described by limiting it to a later-described retransmission mode.

  Regarding the height information, it is generally possible to recognize not only the upper limit position or the lower limit position in the blind lifting / lowering range of the blind device, but also the relative position of the lifting / lowering range in the middle position. For the sake of brevity, the height of the blind pointed to by the height information is 'upper limit' indicating that the blind is raised and stopped at the upper limit position of the lift range, and is lowered and lift range. It is limited to three types: 'lower limit' indicating that the vehicle is stopped at the lower limit position, and 'intermediate' indicating that the vehicle is stopped at any intermediate position.

  That is, in the present embodiment of the system shown in FIG. 1, the control device 1 performs the raising / lowering operation of the blind devices 2a to 2e, and the blind devices 2a to 2e are raised to the upper limit position or the lower limit position when the upper limit or lower limit is reached. An answer signal containing information is transmitted, and the control device 1 confirms the ascending / descending operation of the blind devices 2a to 2e from these answer signals, and retransmits if there is a blind device that is not the upper limit position or the lower limit position. Thus, it is possible to ascend and descend reliably to the upper limit position or the lower limit position.

  FIG. 2 is a schematic block diagram of the control device 1 of FIG. The control device 1 includes a microcomputer 11, an ascending operation switch 12, a descending operation switch 13, a stop operation switch 14, a retransmission mode switch 15, a transmission circuit 16 and a reception circuit 17 that are operated by a user from the outside. Other operation switches 12 to 14, a retransmission mode switch 15, a transmission circuit 16, and a reception circuit 17 are connected to the microcomputer 11. The transmission circuit 16 and the reception circuit 17 are also connected to the wiring 3. In FIG. 2, the letter “SW” indicates an abbreviation for “switch”. The same applies to other drawings.

  The microcomputer 11 includes a CPU (Central Processing Unit) 18 and a RAM (Random Access Memory) 19. The RAM 19 stores a no-signal management timer 111, a retransmission management timer 112, and a blind device management table 113, which are data. Although not shown, the microcomputer 11 has a clock, and the clocked values of the no-signal management timer 111 and the retransmission management timer 112 are updated in synchronization with a clock signal output from the clock.

  If there is an input from each of the operation switches 12 to 14, the microcomputer 11 transmits an operation signal corresponding to the input from the transmission circuit 16 to the wiring 3 and receives a signal from the wiring 3 via the reception circuit 17. . When the re-transmission mode switch 15 is operated and is “ON”, the operation signal for instructing the lifting / lowering operation transmitted based on the input of the ascending operation switch 12 or the descending operation switch 13 as necessary is again displayed. Then, the signal is transmitted from the transmission circuit 16 to the wiring 3.

  In order to start transmission of the operation signal from the transmission circuit 16, the no-signal management timer 111 is managed (updated) based on the presence or absence of the reception signal from the reception circuit 17. Specifically, when there is a received signal, the no-signal management timer 111 is continuously reset to “0 msec”, and when there is no received signal, counting is performed until “6 msec” is reached. That is, when the no-signal management timer 111 is less than “6 milliseconds”, transmission is disabled, and when it is “6 milliseconds”, transmission is started as transmission is possible.

  Here, the “0 msec” reset is performed every time one character is received that is less than 6 msec (about 1 msec at 9600 bps). Since the no-signal management timer 111 is used only to determine whether or not the operation signal can be transmitted, the “0 msec” reset during signal reception is reset until “6 msec” which is the transmission enable determination time. There is no problem. Therefore, in this embodiment, the count processing of the no-signal management timer 111 is always performed every 0.5 milliseconds regardless of the presence or absence of the received signal.

  Further, in order to retransmit the operation signal as necessary, when the retransmission mode switch 15 is “ON”, the retransmission management timer 112 is set to ON when the rising operation signal or the falling operation signal is transmitted. And start counting.

  When the received signal from the receiving circuit 17 is a response signal, the “upper limit”, “lower limit”, or “intermediate” data, which is height information included in the response signal for each individual number of the blind device, is stored. Store in the blind device management table 113.

  Note that the response signal data for resetting the no-signal management timers 111 and 211 (described later) transmitted during ascending / descending indicates “in operation”, but the response signal data indicates “in operation”. In the blind device management table 113, no value is stored (not updated).

  Then, when the above-mentioned retransmission management timer 112 has counted up after a preset time, when a rising operation signal is transmitted, the blind device management table 113 is searched, It is detected whether the height information stored corresponding to the individual number of the blind device indicates the “upper limit”, and when a lowering operation signal is transmitted, it is detected whether it indicates the “lower limit”. Normally, if the raising / lowering operation is performed normally, all the blind devices indicate the “upper limit” when transmitting the raising operation signal, and similarly the “lower limit” when sending the lowering operation signal, If even one unit indicates different height information, an up or down operation signal is retransmitted.

  FIG. 3 shows a functional configuration of the control device 1. The control device 1 controls and executes a transmission / reception process under the control of the CPU 18, so that a transmission management processing unit 50, a 0.5 msec timer interrupt processing unit 51, a one character reception interrupt processing unit 52, a retransmission control A unit 53 and a transmission start unit 54 are provided.

  The control device 1 further inputs a signal corresponding to the operation given from the ascending operation switch 12, the descending operation switch 13, the stop operation switch 14 and the retransmission mode switch 15, and the type of the switch operated based on the input signal. An operation input unit 55 including a switch determination unit 56 for determining the above is provided. Further, the control device 1 includes a signal generation unit 57 including a transmission set unit 571 that generates a signal to be transmitted via the transmission circuit 16 and sets the generated signal for transmission. Moreover, it has the signal detection part 581 which detects whether the signal was received via the receiving circuit 17, and is provided with the signal analysis part 58 which analyzes the received signal.

  Further, the control device 1 manages the no-signal management timer update unit 59 for updating the no-signal management timer 111, the retransmission management timer update unit 60 for updating the retransmission management timer 112, and the blind device management table 113. A table management unit 61 for performing (write (update) and read (search)) is provided.

  The signal detector 581 detects the signal level of the wiring 3 and detects the presence or absence of a transmission signal in the wiring 3 based on the detection result. Specifically, in the case of RS485 communication, the signal level of the wiring 3 when there is no signal is “1”. In the case of a harmonized synchronization method that is generally adopted, data (usually 8 bits) including a start bit (signal level “0”) and a signal level “0” are included in parity bits. That is, the signal detection unit 581 detects the signal level “0” of the wiring 3, determines that it is a start bit, and receives one data (character) (in the case of 9600 bps, it is about 1 msec). While receiving, it detects that “signal present”.

  All or part of each unit in FIG. 3 is realized by a program executed under the control of the CPU 18.

  FIG. 4 is a schematic block diagram of the blind device 2 of FIG. The blind device 2 according to the present embodiment has a common configuration. Each of the blind devices 2a to 2e corresponding to the blind device 2 includes a microcomputer 21, an individual number switch 22, an individual number set by an external operation, an upper limit switch 23, a lower limit switch 24, a drive circuit 25, a transmission circuit 26, and a reception. A circuit 27 is provided. Other switches 22 to 24, a drive circuit 25, a transmission circuit 26 and a reception circuit 27 are connected to the microcomputer 21. The transmission circuit 26 and the reception circuit 27 are also connected to the wiring 3. The upper limit switch 23 and the lower limit switch 24 are switches that detect that the blind has been lifted up to the upper limit / lower limit of the blind lift range.

  The microcomputer 21 includes a CPU 28 and a RAM 29. In the RAM 29, areas of a no-signal management timer 211, a no-signal management counter 212, and an initial response individual number register 213 are defined. Although not shown, the microcomputer 21 has a clock, and the time value of the no-signal management timer 211 is updated in synchronization with the clock signal output from the clock.

  When the microcomputer 21 receives an ascending operation signal from the receiving circuit 27, the microcomputer 21 performs an ascending operation of a blind (not shown) via the drive circuit 25, and when receiving a descending operation signal, the microcomputer 21 descends via the drive circuit 25. If the stop operation signal is received, the ascending or descending operation via the drive circuit 25 is finished (stopped). If the upper limit switch 23 is “ON” during the ascending operation, the ascending operation is terminated (stopped), and if the lower limit switch 24 is “ON” during the descending operation, the descending operation is terminated (stopped).

  When the lifting / lowering operation is completed, that is, when there is a change in height, an answer signal is generated and transmitted from the transmission circuit 26. Specifically, based on the input from the upper limit switch 23 or the lower limit switch 24, when the input from the upper limit switch 23 indicates “ON”, “upper limit” is indicated, and the input from the lower limit switch 24 indicates “ON”. "Lower" if you want to do, "Intermediate" if you want to indicate "OFF" for any switch input, that is, height information that indicates "Upper limit", "Lower limit", "Middle", An answer signal composed of the individual number data of the individual number switch 22 is generated and transmitted from the transmission circuit 26.

  Further, in order to start transmission without interfering with the answer signal from the transmission circuit 26, the values of the no-signal management timer 211 and the no-signal management counter 212 are updated based on the detection result of the presence / absence of the reception signal from the reception circuit 27. Specifically, when there is a received signal, the no-signal management timer 211 and the no-signal management counter 212 are continuously reset to “0 ms” and “0”, and when there is no received signal, every “0.5 ms” The no-signal management timer 211 starts counting. When the timer value of the no-signal management timer 211 indicates “517.5 msec” as a result of the count, that is, when it is detected that the timer value has reached 518 msec, the next count value is set to “8 msec”. Until the time when it is detected that a received signal is present, the interval between “8 ms” and “517.5 ms” is repeatedly counted every 0.5 ms, and the no-signal management counter 212 is incremented by “+1”.

  The above-described “0 ms” and “0” reset is performed on the one character reception interrupt processing unit 52 built in the microcomputer 21 for each character reception (approximately 1 ms for 9600 bps) that is less than 8 ms. It is carried out. Since the no-signal management timer 211 is used only for transmission permission / inhibition determination, “0 msec” reset when the presence of a reception signal is continuously detected becomes “8 msec” as the transmission permission determination time. In this embodiment, the count processing of the no-signal management timer 211 is always performed every 0.5 milliseconds regardless of the presence or absence of the received signal.

  Note that the count processing every 0.5 ms of the no-signal management timer 211 is asynchronous between the blind devices 2a to 2e, so the timing when each blind device 2a to 2e becomes “8 ms” is 0.5 m. It will have a width of seconds. That is, in the blind system, the variation of the no-signal management timer 211 has a width of 0.5 milliseconds.

  When the received signal from the receiving circuit 27 is a response signal, the next value obtained by adding “+1” to the individual number value (“1” to “255”) included in the response signal is used as the initial response individual number register. By storing in 213, the value of the initial reply individual number register 213 is updated. If the individual number value included in the response signal is the maximum “255”, the minimum “1” is stored instead of “+1” “256”, thereby storing the initial response individual number register 213. Update the value. That is, the first response individual number register 213 stores any value from “1” to “255”. When the above-described operation signal is received, the value “1” is stored in the initial response individual number register 213. The decoding of the received signal and the storage of the value in the initial response individual number register 213 are changed from “0 ms” to “8 ms” when the no-signal management timer 211 completes the reception until the actual transmission start set of the response signal. It is processing until it becomes.

  When transmission of the above-described answer signal is started, whether or not transmission is possible is determined based on the timer value of the no-signal management timer 211 and the value of the initial answer individual number register 213. Until it is determined that transmission is possible, transmission of an answer signal is kept waiting. When the timer value of the no-signal management timer 211 indicates less than “8 milliseconds”, it is determined that the signal from the control device 1 may be transmitted to the transmission path (wiring 3), and it is determined that transmission is impossible. When “8 ms” or more is indicated, it is determined that there is no transmission signal on the wiring 3 and the determination of whether or not transmission is possible is started.

The transmission permission / inhibition determination is performed according to the following determination formula.
(Timer value [8 to 517.5] −8) / 2 + Initial response individual number value [1 to 255]
According to the above discriminant, if the initial response individual number value in the initial response individual number register 213 indicates “1” when the received signal is an operation signal, the determination of whether transmission is possible is as follows. .

  Timer value: 8 → 1 (individual number “1” reply start timing), timer value: 8.5 → 1.25, timer value: 9 → 1.5, timer value: 9.5 → 1.75, timer value : 10 → 2 (individual number “2” reply start timing), timer value: 10.5 → 2.25, timer value: 11 → 2.5, timer value: 11.5 → 2.75, timer value: 12 → 3 (Individual number “3” reply start timing)..., Timer value: 516 → 255 (individual number “255” reply start timing), timer value: 516.5 → 255.25, timer value: 517 → 255 .5, timer value: 517.5 → 255.75.

  Thus, when there is no remainder value in the calculation result value according to the discriminant and the calculation result value matches the individual number of the individual number switch 22, only one blind device to which the individual number is assigned can transmit. Is done. That is, if the timer value is 8 milliseconds, the blind device 2a having the individual number “1” is 10 milliseconds, the blind device 2b having the next individual number “2” is 12 milliseconds, and the next individual device “2” is 12 milliseconds. The blind device 2c with the number “3” can be transmitted, and the blind device 2e with the individual number “255” can be transmitted at 516 msec. In this way, each blind device sequentially transmits a response signal in ascending order of the individual number every 2 milliseconds from the blind device to which the individual number of the initial response individual number register 213 is assigned (the blind device 2a in this embodiment). It is possible. Here, each blind device can be assigned a response signal transmission period of 2 msec, but in actuality, the response is transmitted in the first 1/4 msec period, not the entire msec period of 2 msec. It is limited to the time period (timing). As a result, even if there is a difference in the time measured by the no-signal management timer 211 between the blind devices, it is possible to avoid interference between the transmission timings of the answer signals between the adjacent blind devices.

  In addition, as described above, the no-signal management timer 211 repeatedly counts between “8 ms” and “517.5 ms”, so that after the next 2 ms after 516 ms, the above-mentioned 8 ms is reached. The blind device 2a having the individual number “1” can be transmitted. That is, when the no-signal state continues, the transmission possible timing for each blind device is repeatedly visited every 510 msec.

  When the value of the initial reply individual number register 213 indicates any one of “2” to “255” instead of “1” described above, it can be understood from the above discriminant that after completion of reception. From the time when the timer value of the no-signal management timer 211 is “8 milliseconds”, the response start order comes from the blind devices 2a to 2e that use the value of the initial response individual number register 213 as the individual number.

  Also, the calculation result value according to the discriminant may exceed “255”. In this case, a value obtained by subtracting “255” from the calculation result value is set as the calculation result value. That is, if the value of the no-signal management timer 211 is 8 milliseconds or more, the calculation result value starts from the value of the initial response individual number register 213, becomes the maximum value “255”, and then becomes “1”. Thereafter, the interval between “1” and “255” is repeated.

  Further, since the no-signal management timer 211 counts every 0.5 milliseconds, the transmission possible periods of the blind devices 2a to 2e when the transmission possible timing comes are both "0.5 milliseconds". In addition, all the blind devices cannot transmit during “1.5 milliseconds” between the transmission possible timings of the blind devices 2a to 2e. Since the no-signal management timer 211 of each blind device 2a to 2e has a variation of 0.5 ms as described above, the transmission disable timing of all brand devices of the blind system is at least “1.0 ms. As long as the accuracy of the 0.5 msec timer of each of the blind devices 2a to 2e is the same, a plurality of (two or more) blind devices will not be ready for transmission at the same time.

  However, as the elapsed time increases, the timer deviation between the blind devices 2a to 2e is accumulated, and the transmission impossible timing of all the blind devices described above is also “0” from “1.0 msec”. Then, the possibility of reversal, that is, interference will occur.

  In order to prevent this, a dummy signal is transmitted to the wiring 3 until the all-blind device transmission impossibility timing becomes “0”, and the control device 1 and each of the blind devices 2a to 2e receive no signal at the time of the signal reception described above. The signal management timers 111 and 211 are reset to “0”.

  That is, at the time of stoppage, a fixed time (35 in the present embodiment) in consideration that the above-mentioned all-blind device transmission impossibility timing does not reach “0” during the ascending / descending operation for transmitting an answer signal. Seconds), the answer signal is transmitted and set. In this case, the height information constituting the answer signal indicates “in operation” instead of the “upper limit”, “lower limit”, and “intermediate” at the time of stopping. At the time of updating the blind device management table 113 in the control device 1 described above, the update is not performed when the response signal “in operation” is received. That is, the answer signal as a dummy signal composed of height information instructing “in operation” is intended only for resetting the no-signal management timers 111 and 211.

  In addition, although all the devices of the blind devices 2a to 2e perform the answer set, it is not necessary for all the devices to transmit, and transmission from one unit is sufficient, so when the answer signal is received when the answer is set If it is moving up and down, the answer set is reset.

  FIG. 5 shows a functional configuration of the blind device 2 according to the present embodiment. The blind devices 2a to 2e corresponding to the blind device 2 have the same functional configuration.

  Referring to FIG. 5, blind device 2 includes blind unit 30 for realizing an opening / closing mechanism by raising / lowering operation of blind 302, 0.5 msec timer interrupt unit 31 for controlling signal transmission and reception, and one character A reception interrupt processing unit 32, a transmission permission / inhibition determination unit 33, and a received signal decoding processing unit 34 are provided. The blind unit 30 has a drive circuit 25 for causing the blind 302 to move up and down, an upper limit switch 23 and a lower limit switch for detecting that the blind 302 has been raised to the upper limit of the lift range and lowered to the lower limit by the lift operation. 24, the up / down switch section 301 is included.

  Furthermore, the blind device 2 includes an up / down operation management processing unit 35 for managing the up / down operation. Further, an individual number input unit 36 for inputting individual number data given by the individual number switch 22 is provided.

  Further, the blind device 2 detects a signal received from the wiring 3 via the signal generation unit 37 having a transmission setting unit 371 for generating a signal to be transmitted to the wiring 3 via the transmission circuit 26 and the reception circuit 27. The values of the signal analysis unit 38 including the signal detection unit 381 for analyzing the reception signal when the reception signal is detected, the no-signal management timer update unit 39 for updating the no-signal management timer 211, and the no-signal management counter 212 Are provided with a no-signal management counter updating unit 40 for updating and an individual number register updating unit 41 for updating the value of the initial response individual number register 213.

  All or part of each unit in FIG. 5 is realized by a program executed under the control of the CPU 28.

  Here, with reference to FIG. 6, the configuration of the operation signal and the answer signal according to the present embodiment will be described. Referring to FIG. 6A, the operation signal is composed of a header part and a body part. The header portion stores data (“OP”) 71 indicating a signal type indicating that the signal is an operation signal, and the body portion stores an operation instruction 72 indicating an instruction content by operation. The operation instruction indicates one of ‘up’, ‘down’ and ‘stop’. Note that the operation signal generally includes data for “device designation” (group number, individual number, or individual number range, etc.) to be operated. In this form, “limited to all device designation” and “device designation” data are omitted.

  Referring to FIG. 6B, the answer signal is composed of a header part and a body part. The header portion stores data (“ANS”) 81 indicating the signal type that the signal is an answer signal, and the body portion uniquely identifies the blind device that is the source of the answer signal. Individual number data 82 and height information 83 are stored. The height information 83 indicates a different height (upper limit, lower limit, middle) of the current blind 302 that normally indicates the state of the lifting / lowering operation of the blind device 2. Note that the height information 83 indicates “in operation” when the answer signal is a dummy transmission as described above.

  FIG. 7 shows a content example of the blind device management table 113 according to the present embodiment. Referring to FIG. 7, in blind device management table 113, individual numbers (1 to 255) and height information are stored in association with each of up to 255 blind devices connectable to wiring 3. be able to.

  Actually, in the area corresponding to the individual number assigned to each of the blind devices connected to the wiring 3, the height information (an upper limit, lower limit, or intermediate value) of the answer signal received from the blind device. ) Is stored. Of the individual number data registered in the blind device management table 113 of FIG. 7, if the blind device to which the individual number indicated by the data is assigned is not connected to the wiring 3, the corresponding height information The value of “−” is stored in advance. '-' Indicates that the blind device with the corresponding individual number is not connected to the wiring 3. In the blind device management table 113 of FIG. 7, it is assumed that the data “−” is initialized.

  FIG. 8 is a flowchart showing a main routine of the transmission management processing unit 50 of the control device 1, and FIG. 9 is a flowchart showing a routine of the 0.5 msec timer interrupt processing unit 51 of the control device 1. Next, the operation of the control device 1 will be described with reference to FIGS. 1, 2, 3, 8 and 9.

  When any one of the operation switches 12 to 14 is operated, the operation input unit 55 determines that the operation switch input is “present” in step S1 (hereinafter, step is omitted), and the switch determination unit 56 operates in step S2. Determine the type of switch. Based on the determination result of the switch determination unit 56, the signal generation unit 57 generates an operation signal in which the operation signal 72 indicates the “ascending operation” in S8 when it is determined that the operation switch 12 is the rising operation switch 12. The transmission set unit 571 transmits and sets the generated signal. Similarly, when it is determined that the switch is the lowering operation switch 13, in S <b> 9, the signal generation unit 57 generates an operation signal in which the operation signal 72 indicates “down operation”, and the transmission set unit 571 transmits the generated signal to the transmission set. To do. If the stop operation switch 14 is determined, the signal generation unit 57 generates an operation signal indicating that the operation signal 72 indicates “stop operation” in S10, and the transmission setting unit 571 transmits and sets the generated operation signal.

  Here, “transmission set operation signal” means that the transmission set unit 571 stores the operation signal in a “transmission signal buffer” (not shown), which is a predetermined area of the RAM 19, and is stored in the RAM 19 in advance. This indicates that a “transmission set flag” (not shown) is set (for example, updated to “1”). When the operation signal of the “transmission signal buffer” is read and transmitted via the transmission circuit 16, the transmission set unit 571 resets the “transmission set flag” (for example, updates to “0”). “Reset operation signal” means that the transmission set unit 571 sets a “transmission set flag” (“0”) so that the operation signal stored in the “transmission signal buffer” is transmitted again. To "1").

  If the “up” or “down” operation signal is set to be transmitted, the operation input unit 55 determines the input from the retransmission mode switch 15 in S13. If it is determined that “ON” is operated based on the determination result, in S14, the retransmission management timer update unit 60 sets the retransmission management timer 112 to the timer value “0” and turns it on (starts timing).

  If it is determined that the retransmission mode switch 15 is operated “OFF” based on the determination result, or if it is determined that the stop operation switch 14 is operated, the retransmission management timer in S15. The update unit 60 turns off the retransmission management timer 112 (stops timing).

  That is, when the operation switches 12 to 14 are operated, an operation signal of a type corresponding to the type of the operation switch is transmitted and set, and the retransmission management timer 112 is turned on and the timer value “0” is set or turned off. Is implemented.

  If the operation switches 12 to 14 are not operated, it is determined in S1 that the operation input is “none”, and then the retransmission management timer updating unit 60 turns on the retransmission management timer 112 (S3) and counts up (S4). ) Is determined and it is determined that it is not ON (S3 “No”), or when it is determined that it is ON (S3 “Yes”) but is not counting up (S4 “No”). No processing is performed, and the process proceeds to the next main routine processing (not shown).

  However, if it is determined that the retransmission management timer 112 is set and counting up (for example, 40 seconds), the operation switch input is “NO” at S1, and the retransmission management timer 112 is turned ON at S3. "Yes", the retransmission management timer 112 time-up is determined "Yes" in S4, and in S5, the retransmission control unit 53 transmits the operation signal that has been transmitted but remains set in the transmission signal buffer. Is determined. If it is determined that the operation instruction 72 indicates an “up” operation, the process proceeds to S6, and if it is detected that an “down” operation signal is specified, the process proceeds to S7.

  In S6, the table management unit 61 searches the blind device management table 113 and determines the stored height information. When it is determined that the height information corresponding to all blind devices indicates “upper limit” (Yes in S6), the process proceeds to S15. However, if it is determined that no “upper limit” is instructed (No in S6), the transmission setting unit 571 sets the ascending operation signal again in S11. Thereafter, the process proceeds to S15.

  In S15, the retransmission management timer updating unit 60 turns the retransmission management timer 112 off.

  In S7, the height information of the blind device management table 113 is determined as in S6. If it is determined that the height information corresponding to all the blind devices indicates “lower limit” (Yes in S7), the process proceeds to S15, but if it is determined that even one unit does not indicate “lower limit” (in S7). No), in S12, the transmission setting unit 571 retransmits and sets the descending operation signal, and then proceeds to S15.

  As a result, in the next processing of S1, the operation switch input is “no”, the retransmission management timer 112 • ON is determined to be “No” in S3, and the next operation switches 12 to 14 are input next. It will only shift to the main routine processing.

  In other words, when the retransmission management timer 112 is set in S14, whether the preset time elapses and the time-up is detected, whether the operation is increasing to the upper limit or is decreasing to the lower limit. Is determined by the signal analysis unit 58 based on the received data of the received answer signal. As a result of the determination, when it is detected that at least one of all the blind devices 2a to 2e indicates the height information 83 different from the others, the re-transmission of the raising / lowering operation signal transmitted in S8 or S9 is performed by the retransmission control unit 53. Performed only once under control. That is, the transmission start unit 54 detects that the “transmission set flag” is set (“1”), and reads the operation signal stored in the “transmission signal buffer” in response to the transmission circuit 16. To the wiring 3. Thereby, the same operation signal is transmitted again.

  When the above-described lifting operation signal is set for transmission, the transmission start unit 54 controls the actual transmission start processing via the transmission circuit 16. Specifically, the transmission start unit 54 starts transmission according to the 0.5 msec timer interrupt routine of FIG. 9 by the 0.5 msec timer interrupt processing unit 51.

  Referring to FIG. 9, the 0.5 ms timer interrupt routine is started when CPU 18 issues an interrupt to 0.5 ms timer interrupt processing unit 51 every 0.5 ms. When activated, the 0.5 msec timer interrupt processing unit 51 controls each unit to perform the following processing.

  First, in S21, the no-signal management timer updating unit 60 reads the timer value of the no-signal management timer 211, and determines whether or not the timer value indicates “6 milliseconds”. If it is determined that “6 msec” is instructed (Yes in S21), the process proceeds to S23. If it is determined that no instruction is given (No in S21), the timer value of the no-signal management timer 111 is “+0.5 m in S22. Second "is processed.

  That is, from “0 msec” while receiving the operation signal or answer signal from the receiving circuit 17, it increases in 0.5 msec units after the end of reception, and when it becomes 6 msec, it is determined that the count is incremented in S 21. The counting process is not performed.

  Following the count process of the non-signal management timer 111, an actual transmission start process of the operation signal is performed. That is, when the operation signal transmission set is performed in S8 to S12 described above, in S23, the no-signal management timer update unit 59 detects that the transmission set flag indicates “1”, and accordingly, the operation signal (S23: Yes), the timer value of the no-signal management timer 111 is read at S24, and the read timer value is determined. As a result of the determination, if the timer value does not indicate 6 milliseconds (No in S24), the interrupt process is terminated through the process of S26. On the other hand, if 6 ms has been instructed or if 6 ms has been reached (Yes in S24), the actual transmission start is set in S25.

  That is, when the operation signal is set to be transmitted, if the no-signal management timer 111 is 6 milliseconds, or waits until 6 milliseconds, the transmission start unit 54 reads the operation signal read from the transmission signal buffer, Transmission to the wiring 3 is started via the transmission circuit 16. This is called actual transmission start.

  If the actual transmission start processing is performed, transmission of each operation character by one character transmission (about 1 msec in the case of 9600 bps) starts transmission by interruption processing at the end of transmission of one character for the next character transmission set processing All character transmission of the operation signal to be transmitted is sequentially performed by the next transmission character set processing unit (not shown) in the unit 54.

  If the signal detection unit 581 detects that there is a reception signal from the reception circuit 17, the process of resetting the no-signal management timer 111 to “0 ms” by the no-signal management timer update unit 59 is a separate interrupt. Routine, that is, each time one character of the received signal is received (in the case of 9600 bps, about 1 ms), the no-signal management timer update unit 59 is controlled by the interrupt of the one-character reception interrupt processing unit 52, “0 ms” reset processing (omitted) for storing (updating) “0” in the management timer 111 is performed.

  If the retransmission management timer 112 is ON, “Yes” is determined in S26 of the 0.5 msec timer interruption process, and the retransmission management timer update unit 60 performs the next S27. The value of the retransmission management timer 112 is updated by “+0.5 msec”.

  10 shows a flowchart of the main routine of the reception signal decoding processing unit 34 of the blind devices 2a to 2e, FIG. 11 shows a main routine of the management processing unit 35 during the lifting operation, and FIG. 12 shows 0.5 milliseconds of the blind devices 2a to 2e. The process flowchart of the timer interruption part 31 is shown. Next, operations of the blind devices 2a to 2e will be described with reference to FIGS. 1, 4, 5, and 10 to 12. FIG.

  When the signal detection unit 381 receives the operation signal or answer signal from the reception circuit 27, that is, all character signals constituting each signal, the signal analysis unit 38 analyzes the signal in S31 and receives the signal based on the analysis result (S31). Yes). In S32, the received signal decoding processing unit 34 decodes the received signal, and based on the information in the header part, the received signal is an “up”, “down”, “stop” operation signal from the control device 1. The type of whether there is a reply signal ("answer") from the blind devices 2a to 2e is determined.

  When it is determined that the operation signals are “up”, “stop”, and “down”, the received signal decoding processing unit 34 instructs an up operation in S33, a stop operation in S34, and a down operation in S35, respectively. The drive signal is output to the drive circuit 25 of the blind unit 30. As a result, the drive circuit 25 drives the blind 302 based on the given drive signal, so that the blind 302 moves up and down or stops based on the operation signal.

  If a “stop” operation is performed in S34, a response signal is generated by the signal generation unit 37 in S36, and a response set is performed for the response signal generated by the transmission set unit 371. In both cases, the value of the initial response individual number register 213 is updated to “1” by the individual number register update unit 41 in the next S37.

  In the case of an answer signal, the answer is determined as “answer” in S32, and whether or not the elevator circuit is in the ascending / descending operation is determined based on the signal output from the drive circuit 25 to the blind 302 by the elevating / moving operation management processing unit 35 in the next S38. . If it is determined that the elevator is moving up and down (Yes in S38), the transmission set unit 371 resets the response of the response signal in S39, that is, if the response is set, the transmission of the response signal is stopped. It becomes.

  Here, the “answer set” is a set (stored) of the answer signal generated by the signal generation unit 37 in a “transmission signal buffer” (not shown), which is a predetermined area of the RAM 29 of the microcomputer 21. In the same manner, it indicates that a “transmission set flag” (not shown) stored in advance in the RAM 29 is set (updated to “1”).

  Further, “answer reset” means that the transmission set unit 371 resets the “transmission set flag” (updates to “0”). Therefore, when the “transmission set flag” is set, it is determined that the response signal of the “transmission signal buffer” is transmitted, and when it is reset, it is determined that the response signal of the “transmission signal buffer” is not transmitted.

  When the answer is set during the lifting / lowering operation, the answer signal of the “transmission signal buffer” is a dummy answer signal as will be described later.

  Next, in S40, the received signal decoding processor 34 determines whether or not the value of the individual number 82 included in the answer signal received in S31 is the maximum value “255”. When it is determined that it is not “255” (No in S40), the individual number register updating unit 41 increments the value of the individual number 82 included in the received answer signal to “+1” in the initial answer individual number register 213 in S41. Stores a value.

  If the individual number 82 is a response signal indicating “255” (Yes in S40), the value of the initial response individual number register 213 is set to the value next to “255” by the individual number register update unit 41 in S37. “1”, which is the individual number of, is stored.

  That is, if the blind device receives the operation signal, the blind device starts driving of the lifting operation or stops during the lifting operation based on the operation instruction 72 of the operation signal, and further responds when the operation instruction 72 instructs the stop operation. Perform signal answer set. When the operation signal is received, the individual number 82 of the response signal to be transmitted at the time of stop indicates “1”, and when the response signal is received, the response from the next individual number Thus, the value of the initial reply individual number register 213 is updated.

  Further, in the case of an answer signal, transmission of a dummy answer signal for the purpose of resetting the no-signal management time is interrupted in S39.

  Subsequently, the processing in FIG. 11 is performed by the management processing unit 35 during the lifting operation. First, when it is determined that the lifting / lowering operation is stopped based on the output signal from the drive circuit 25 of the blind unit 30 (No in S51, No in S52), the process proceeds to the next main routine process. If it is determined that the ascending or descending operation is being performed in response to receiving the ascending or descending operation signal, “Yes” is determined in S51 during ascending, and “Yes” is determined in S52 during descending. During the ascent, the ON / OFF of the upper limit switch 23 is determined based on the output of the elevating switch unit 301 in S53, and the ON / OFF of the lower limit switch 24 is determined based on the output of the elevating switch unit 301 during descending. Is done. If none of the outputs has risen to the upper limit or has been lowered to the lower limit, and the output instructs “OFF”, the process proceeds to the next main routine process.

  When the up / down operation management processing unit 35 detects that the upper limit switch 23 is “ON” during ascending or the lower limit switch 24 is “ON” during descending based on the output of the up / down switch unit 301, in S55 The drive circuit 25 is controlled to stop the lifting operation. In step S56, the management processing unit 35 during the lifting operation controls the signal generation unit 37 to generate a response signal and implement a response set.

  That is, when the ascending operation is raised to the upper limit position, or when the descending operation is lowered to the lower limit position, the ascending / descending operation is stopped and an answer signal is generated and the answer is set. The height information 83, which is the response data of the generated response signal, is “upper limit” because the upper limit switch 23 is ON when rising, and “lower limit” because the lower limit switch 24 is ON when descending. Instruct each one. Further, the individual number 82 of the generated answer signal indicates the individual number input from the individual number switch 22 by the individual number input unit 36.

  When the above answer signal is set as an answer, the actual answer signal transmission start process is performed by the 0.5 ms timer interrupt unit 31 controlling each unit according to the 0.5 ms timer interrupt routine of FIG. carry out. The 0.5 msec timer interrupt unit 31 is activated when the CPU 28 issues a timer interrupt every 0.5 msec.

  In the 0.5 msec timer interruption routine, first, the “+0.5 msec” processing of the timer value of the no-signal management timer 211 is performed by the no-signal management timer updating unit 39 in S61. Then, the timer value updated in S62 is checked, and if it is not 518 msec, it is determined as “No”, this “+0.5 msec” process is terminated, and the process proceeds to a response actual transmission start process in S68. . However, if it is 518 msec (Yes in S62), that is, if it is 517.5 msec, the no-signal management timer update unit 39 sets “+0.5 msec” of the no-signal management timer 211 in S63. The update timer value is updated to 8 milliseconds.

  Note that the timer value of the no-signal management timer 211 is reset to 0 msec during reception as described later, and is added by 0.5 msec from the completion of reception as described above. That is, the timer value of the no-signal management timer 211 is updated as 0 msec → 517.5 msec → 8 msec → 517.5 msec → 8 msec..., 510 msec between 8 msec and 517.5 msec Repeat every time.

  If “8 milliseconds” is set in S63 described above, then whether or not the lifting operation is being performed is determined based on the output signal of the drive circuit 25 by the lifting operation management processing unit 35 in S64. If it is detected that the lifting / lowering operation is being performed based on the determination result (Yes in S64), the non-signal management counter update unit 40 increments the non-signal counter 212, that is, the value of the no-signal counter 212 is incremented by "1" in S65.

  The count value of the no-signal management counter 212 is reset to “0” by the no-signal management counter update unit 40 during reception, as will be described later, as in the case of the no-signal management timer 211. Each time the timer value is changed from 8 ms to 518 ms, it is incremented by “+1”.

  Then, in S66, it is determined whether or not the value of the no-signal management counter 212 that has been “+1” indicates “60”. If it is not detected that the determination result indicates “60” (No in S66), the process proceeds to the answer set process in S68. However, if it is detected that “60” is indicated, that is, if the no-signal time is about 30 seconds, that is, 30608 msec (8 msec + 510 msec × 60) (Yes in S66), the signal generation unit 37 in S67. An answer signal is generated and an answer set is made, and the process proceeds to the answer set process of S68.

  Subsequent to the count processing of the above-described no-signal management timer 211 and no-signal management counter 212, the actual transmission start processing of the answer signal is performed. That is, when the answer set is executed in S36, S56 or S67 described above, the answer set is determined based on the value of the “transmission set flag” in the RAM 29 in S68 (Yes in S68), and no answer is set in S69. The signal management timer update unit 39 determines the timer value of the no-signal management timer 211. If it is detected that less than 8 milliseconds is instructed (No in S69), the interrupt routine is terminated.

  On the other hand, if it is detected that an instruction of 8 milliseconds or longer (8 milliseconds to 517.5 milliseconds) is instructed (Yes in S69), the process proceeds to S70. That is, after waiting for 8 milliseconds after the completion of reception, calculation according to the above-described transmission propriety discriminant is performed by the transmission feasibility discriminating unit 33 in S70. Then, the transmission permission / inhibition determining unit 33 determines in S71 whether or not a remainder value of the calculation result is generated. When the occurrence of the remainder value is detected (Yes in S71), the interruption routine is terminated, and when the occurrence of the remainder value is detected (No in S71), the transmission permission / inhibition determination unit 33 calculates the calculation result value and the individual number input unit in S72. The input value of the individual number switch 22 via 36 is compared. If it is determined that the two values do not match based on the comparison result (No in S72), the interrupt routine is terminated. If a match between the two values is detected (Yes in S72), actual transmission starts in S73. Is set.

  Here, “actual transmission start is set” means that the transmission set unit 371 reads the first character from the response signal stored in the “transmission signal buffer” and transmits it to the wiring 3 via the transmission circuit 26. Point to. Thereafter, one character is sequentially read and transmitted.

  As described above, when the no-signal management timer 211 is 8 milliseconds or more when the answer signal is set as an answer, the transmission permission timing is determined based on its own individual number, and the permission is determined for each individual number based on the determination result. The actual transmission of the response signal is started at the timing when the response is made.

  If the actual transmission start process is performed, the actual transmission process of the response signal is managed and performed in a separate interrupt routine (omitted) in the same manner as the control device 1 described above.

  Note that a process for resetting the no-signal management timer 211 to “0 msec” and a process for resetting the no-signal management counter 212 to “0” when there is a reception signal from the reception circuit 27 is a separate interrupt routine, that is, a reception routine. Each time one character of a signal is received (about 1 msec in the case of 9600 bps), the no-signal management timer update unit 39 and the no-signal management counter update unit 40 are controlled under the control of the one-character reception interrupt processing unit 32. Is executed by a no-signal management timer / counter reset process (omitted) for storing and updating “0” in the no-signal management timer 211 and the no-signal management counter 212.

  Next, in a state where the blind devices 2a to 2e are stopped at the upper limit position, the blind device 2a to the control device 1 when the input from the retransmission mode switch 15 indicates "on" and the lowering operation is performed. 2e and the operation of the control device 1 will be described with reference to the flowchart of FIG.

  When the lowering operation switch 13 of the control device 1 is operated, it is determined that the operation switch input is “present” (S1) and the type is the “lowering” switch (S2), and the signal generation unit 57 displays the “lowering” operation instruction 72. The operation signal is generated and set for transmission (S9), and it is determined by the operation input B55 that the input of the retransmission mode switch 15 indicates “ON” (S13), and then retransmitted by the retransmission management timer updating unit 60. The management timer 112 is turned on and the timer value is set to “0” (S14).

  The “decrease” operation signal set for transmission is determined as transmission set “Yes” (S 23), and if no signal is received after 6 msec or after 6 msec of no signal, the no-signal management timer update unit 59 outputs no signal. It is detected that the signal management timer indicates 6 milliseconds (Yes in S24), and actual transmission is set to start (S25). The “down” operation signal that is set to start actual transmission is transmitted from the transmission circuit 16 to the wiring 3 that is the transmission path by the transmission start unit 54.

  When the control device 1 transmits the “descent” operation signal, which has started actual transmission, from the transmission circuit 16 and receives the operation signal via the reception circuit 17, the signal analyzer 58 detects that the operation signal has been received. As a result, the no-signal management timer updating unit 59 resets the no-signal management timer 111 to “0 msec”, and after the end of transmission of the “decreasing” operation signal, that is, the end of reception, the no-signal management timer update unit 59 becomes 6 msec every 0.5 msec. Until it is, it is determined that the response is 6 ms “No” (S 21), the “+0.5 ms” count process (S 22) is performed, and the retransmission management timer update unit 60 detects the ON of the retransmission management timer 112. (Yes in S26), the retransmission management timer 112 performs “+0.5 msec” count processing (S27).

  In the blind devices 2a to 2e, when the signal detection unit 381 detects reception of the “down” operation signal transmitted to the wiring 3 via the reception circuit 27 (Yes in S31), the signal analysis unit 38 receives the reception signal. Analysis is performed to detect that the signal type is “down” (S32). Based on the detection result, the management processing unit 35 during the lifting / lowering operation instructs the lowering operation to the drive circuit 25 (S35). Since the drive circuit 25 outputs a drive signal for the lowering operation to the blind 302 based on the instruction, the blind 302 starts the lowering operation. At this time, the individual number register updating unit 41 updates the value of the initial reply individual number register 213 to “1” (S37).

  During reception of the “down” operation signal, the no-signal management counter 212 is reset to “0”, the no-signal management timer 211 is reset to “0 msec”, and “+0. 5 ms "count (S61) is performed. After the end of reception, the no-signal management timer 211 is changed from “0 msec” to “+0.5 msec” (S61). When counting up to 518 msec (Yes in S62), it is updated to 8 msec (S63), and it is detected that the ascending / descending operation is being performed (Yes in S64), and the no-signal management counter 212 is updated by “+1”.

  Then, as described above, when the 518 ms of the no-signal management timer 211 after about 30 seconds is updated and set to 8 ms (S63), and the no-signal management counter 212 is set to "+1" (S67), the no-signal management counter When it is detected that the value 212 indicates 60 (Yes in S66), an answer signal answer set (S67) is performed.

  Since the timer value of the no-signal management timer 211 is “8 milliseconds” and the value of the initial response individual number register 213 is “1”, in the subsequent actual transmission start process, the blind of the individual number “1” is blinded. Only the device 2 a transmits the response signal set to start actual transmission from the transmission circuit 26 to the wiring 3. That is, since the descent operation is in progress, the height information 83 indicates “in operation”, and the individual number 82 indicates the actual transmission start set (S 73) indicating “1”. Sent.

  Similar to the above-described “down” operation signal, the answer signal transmitted to the wiring 3 is received by the control device 1 and the blind devices 2a to 2e. In response to this reception, the respective no-signal management timers 111 and 211 are reset to “0 msec”, and the no-signal management counter 212 is reset to “0”.

  The blind devices 2a to 2e detect that the type of the received signal is “answer” (S32), then detect that the lifting / lowering operation is being performed (Yes in S38), and reset the answer ( S39). That is, transmission of the dummy answer signal set in the devices having the individual numbers 2 to 255 of the blind devices 2b to 2e is interrupted. Next, “2” obtained by adding “+1” to the individual number “1” is stored in the initial response individual number register 213 by the individual number register updating unit 41 (S41).

  Thus, about 30 seconds after receiving the “down” operation signal, the answer set is performed in all the devices of the blind devices 2a to 2e, but only the answer signal of the blind device 2a having the individual number “1” is wired. 3, the no-signal management timers 111 and 211 of the control device 1 and the blind devices 2a to 2e are reset. That is, the 30-second timer deviation of the no-signal management timers 111 and 211 is reset.

  When the signal analysis unit 58 of the control device 1 detects that the received response signal height information 83 indicates “in operation”, the table management unit 61 responds accordingly to the blind device management table 113 based on the response signal. The value of is not updated.

  As described above, when the lower limit switch 24 is turned on after about 35 seconds, it is not in the ascending operation (No in S51), is in the descending operation (Yes in S52), and the lower limit switch is determined to be 'ON'. Then, the management processing unit 35 during the lifting operation controls the drive circuit 25 to stop the blind 302 (S55), so that the blind 302 of the blind devices 2a to 2e is stopped at the lower limit position. It becomes.

  It should be noted that the timing at which the actual lower limit switch 24 is turned ON varies as a result of the blind devices 2a to 2e, and as a result, the timing of the answer set (S56) varies, and the timing at which the answer is set is not necessarily the transmittable timing. Therefore, the blind device 2a does not always reply first as in the case of the above-described answer signal, and the height information “lower limit” is set as the content from the blind devices 2a to 2e at the transmission management timing set as the answer. The response signal to be transmitted is actually transmitted.

  The blind devices 2a to 2e to which the individual number greater than the individual number 82 of the answer signal transmitted first is assigned will continue to transmit the answer signal if the answer is set. . When a plurality of devices are set as answers, the transmission start timing is managed as described above, and answers are made in the order of individual numbers every 8 msec of no-signal time.

  When the answer signal is received from the blind device 2e (individual number “255”), the initial answer individual number register 213 detects that the individual number 82 of the answer signal indicates “255” (Yes in S40). ), “1” is set in the initial reply individual number register 213 (S37). That is, when the blind device 2a with the individual number “1” has not yet been answered, a response signal is transmitted from the blind device 2a. As a result, even in the blind devices 2a to 2e to which the individual number smaller than the individual number 82 of the answer signal transmitted first is assigned, the answer signal is transmitted and the value of the individual number 82 is obtained. The response signals from “1” to “255” are transmitted on the wiring 3 without interference because the transmission start timing is managed.

  The control device 1 stores the value “lower limit” indicated by the received response signal height information 83 in association with each piece of data indicated by the response signal individual number 82 in the blind device management table 113 ( Update. When all the blind devices normally descend and stop at the lower limit, an answer signal with the height information 83 as “lower limit” is transmitted from all the blind devices, received by the control device 1, and the received answer Based on the signal, “lower limit” data is stored corresponding to all the individual numbers “1” to “255” in the blind device management table 113.

  Then, as described above, after 40 seconds, the retransmission management timer 112 counts up (Yes in S4), and it is detected that the transmitted signal is “down” (S5). It is detected whether all the height information corresponding to the individual number indicates the “lower limit” (S7). Here, if it is detected that all indicate the “lower limit” (Yes in S7), only the retransmission management timer 112 is set to “OFF” in S15, but it is detected that all do not indicate the “lower limit”. Then (No in S7), the “down” operation signal is set for retransmission (S12) and the retransmission management timer 112 is set to “OFF”.

  Since the retransmission management timer 112 is OFF, it is not retransmitted again, and only one retransmission is performed.

  Next, the operation of the blind devices 2a to 2e and the control device 1 when the ascending operation is performed will be described.

  Referring to FIG. 8, when the ascent operation switch 12 of the control device 1 is operated (S 1, S 2), the operation indicating the “increase” operation instruction 72 in the same manner as the operation of the above-described descend operation switch 13. A signal is transmitted to the wiring 3 (S8 and FIG. 9), and the blind devices 2a to 2e reset the no-signal management counter 212 to “0” and the no-signal management timer 211 to “0 ms”, and start counting. At the same time, the ascending operation is started via the drive circuit 25.

  Similarly, after about 30 seconds, a dummy answer signal is transmitted from the blind device 2a whose individual number is “1”.

  Similarly, when the upper limit switch 23 is turned on after 35 seconds, the operation is stopped (S55), the blind devices 2a to 2e stop at the upper limit position, and the height information 83 transmits an answer signal indicating "upper limit". Transmission is performed from the blind device whose management timing matches.

  Similarly, after 40 seconds, it is determined whether all the height information in the blind device management table 113 is “upper limit” (S6). Here, if it is detected that the height information of all the blind devices is “upper limit”, the retransmission management timer 112 is merely set to “OFF”, but the height information of all the blind devices is “upper limit”. If it is not detected, the “up” operation signal is retransmitted only once.

  Next, operations of the blind devices 2a to 2e and the control device 1 when the stop operation is performed will be described.

  When the stop operation switch 14 of the control device 1 is operated, an operation signal indicating a “stop” operation instruction 72 is transmitted to the wiring 3 in the same manner as when the lower operation switch 13 and the upper operation switch 12 are operated. The blind devices 2a to 2e reset the no-signal management counter 212 to “0”, reset the no-signal management timer 211 to “0 msec”, start counting, and start the stop operation via the drive circuit 25, respectively. To do. That is, when the above-described descending operation or ascending operation is being performed, the descending or ascending operation is interrupted and stopped between the lower limit and the upper limit.

  Then, an answer signal answer set (S36) is performed. Note that the value of the initial reply individual number register 213 is updated to “1” in the same manner as in the above-described ascending operation and descending operation.

  These answer sets are executed in all the blind devices 2a to 2e, and after 8 milliseconds after the no-signal time is possible to transmit the answer signal, the answer sets are set in all the blind devices. Since the value also indicates “1”, the height information 83 indicating either “upper limit”, “lower limit”, or “intermediate” from the blind device 2a where the individual number indicates “1” first, and the individual indicating “1” A response signal having the content of the number 82 is started to be transmitted, and subsequently transmitted to the blind device 2e whose individual number is “255” every 8 msec of the no-signal time.

  In the case of a “stop” operation signal, regardless of the setting of the retransmission mode switch 15, the retransmission management timer 112 is turned off (S15). Even if it is, the operation signal is not retransmitted.

  As described above, the operation signal from the control device 1 is only when it is operated and when it is retransmitted when it is not moving up and down according to the operation signal, and the response signals from the blind devices 2a to 2e are blind. When there is a change in the height information 302, and when the no-signal time becomes long when the answer signal is transmitted, there is only one signal for resetting the no-signal management timers 111 and 211, eliminating unnecessary communication. ing.

  Furthermore, the operation signal from the control device 1 can always be transmitted except immediately after signal communication, and even if the response signals from the blind devices 2a to 2e are continuous, 6 ms after each response signal. Since transmission can be performed preferentially, even if an operation is performed, the start of operation is not delayed, and good operability is ensured. In addition, response signals transmitted from a plurality of blind devices at substantially the same timing are set for transmission only after receiving an operation signal. The devices 2a to 2e manage the transmission start timing so as not to overlap based on a single individual number, thereby realizing reliable communication. Furthermore, when the elapsed time from receiving the operation signal to the response becomes longer, a dummy response signal is transmitted (in the above embodiment, transmitted after about 30 seconds), so that the deviation of the no-signal management timer is reduced. This prevents the transmission start timing from becoming large and overlapping.

  In the above-described embodiment, the number of retransmissions is set to one, but it is also possible to set the number of retransmissions to two or three times.

  The table management unit 61 searches the blind device management table 113 on the assumption that all 255 devices are connected. However, the table management unit 61 can be limited to some blind devices. That is, it is possible by newly setting the connected device flag data in the blind device management table 113 and adding a setting function. For example, “-” in FIG. 7 is equivalent to “connected device flag data”.

  Although the timer-up value of the retransmission management timer 112 is a fixed value (40 seconds in the above embodiment) by a program, if a setting switch that can be operated externally is provided separately, the setting switch can be operated by the user. It is possible to variably set to such time.

  The embodiment disclosed this time should be considered as illustrative in all points and not restrictive. The scope of the present invention is defined by the terms of the claims, rather than the description above, and is intended to include any modifications within the scope and meaning equivalent to the terms of the claims.

It is a figure showing the whole electric blind system composition concerning an embodiment of this invention. It is a schematic block diagram of the control apparatus shown in FIG. It is a function block diagram of the control apparatus shown in FIG. It is a schematic block diagram of each blind apparatus shown in FIG. It is a function block diagram of each blind apparatus shown in FIG. (A) And (B) is a figure which shows an example of the format of the signal which concerns on this Embodiment. It is a figure which shows the example of the content of the blind apparatus management table which concerns on this Embodiment. It is a flowchart which shows the transmission management process of the control apparatus shown in FIG. It is a flowchart which shows the 0.5 ms timer interruption process of the control apparatus shown in FIG. It is a flowchart which shows the received signal decoding process of the blind apparatus shown in FIG. It is a flowchart which shows the management process during the raising / lowering operation | movement of the blind apparatus shown in FIG. It is a flowchart which shows the 0.5 msec timer interruption process of the blind apparatus shown in FIG.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 Control apparatus, 2a-2e Blind apparatus, 3 wiring, 11, 21 Microcomputer, 12 Ascending operation switch, 13 Decreasing operation switch, 14 Stop operation switch, 15 Retransmission mode switch, 16, 26 Transmission circuit, 17, 27 Reception Circuit, 22 Individual number switch, 23 Upper limit switch, 24 Lower limit switch, 25 Drive circuit, 111, 211 No signal management timer, 112 Retransmission management timer, 113 Blind device management table, 213 Initial response individual number register.

Claims (11)

A plurality of switching devices connected to a transmission path capable of bidirectional communication, opening and closing in accordance with the received operation signal, and sending a reply signal to answer the state;
A control device that is connected to the transmission path and transmits the operation signal to open and close the plurality of opening and closing devices, and receives the answer signal and manages the state;
Each of the plurality of switching devices is
Number input means for inputting a device number for uniquely identifying self in advance;
Answer start timing determining means for determining an answer start timing for starting transmission of the answer signal after a predetermined time has elapsed in the transmission path without a transmission signal,
The answer start timing determining unit is an electric switching system in which the answer start timing is made different for each device number input by the number input unit. Each of the plurality of switching devices further includes a timer,
The answer start timing determining means is:
A predetermined timing within a predetermined length of time after the passage of a predetermined time is detected by the timer and no transmission signal in the transmission path is determined as the answer start timing;
The electric opening and closing system according to claim 1, wherein the start timing of the period of the predetermined length is different for each device number input by the number input means. Each of the plurality of switching devices is assigned the device number in order from the minimum value to the maximum value of the device number,
The electric switching system according to claim 1, wherein the device number to be assigned next to the maximum device number is the minimum device number. Each of the plurality of switching devices is
A first receiving means for receiving from the transmission path the operation signal transmitted from the control device to the transmission path and the answer signal transmitted from the plurality of switching devices to the transmission path;
The answer start timing determining means is:
The electric switching system according to claim 1, wherein the answer start timing is calculated using an elapsed time after reception of the signal by the first receiving unit and the device number of the device itself. The control device
A second receiving means for receiving from the transmission path the operation signal transmitted from the control device to the transmission path and the answer signal transmitted from the plurality of switching devices to the transmission path;
The operation start possible timing determination means which determines the operation start possible timing which starts transmission of the said operation signal to the said transmission line based on the elapsed time after completion | finish of signal reception by the said 2nd receiving means. The electric opening and closing system described in 1. The answer signal includes the device number of the switchgear that is the source of the answer signal,
The answer start timing determining means is:
When the response signal is received by the first receiving means, the initial device number indicated by the device number included in the received response signal, and the process after the reception of the response signal by the first receiving means is completed. The electric switching system according to claim 4, wherein the answer start timing is calculated using time and the device number of the device.   The electric switching system according to claim 6, wherein the initial device number used for calculating the answer start timing indicates a device number next to the device number included in the received answer signal.   When the device number included in the received response signal indicates the maximum device number assigned to the plurality of switchgears, the next device number is the minimum assigned to the switchgears The electric switching system according to claim 7, wherein a device number of a value is indicated.   When the opening / closing operation is started according to the operation signal, the operation signal or the response signal is received by the first receiving means until the operation is completed, and when the predetermined time has elapsed from the end of reception, the response signal is The electric switching system according to claim 4, wherein transmission is performed according to the determined answer start timing.   The electric switching system according to claim 1, wherein a timing at which transmission of the operation signal by the control device can be started precedes the answer start timing. Each of the plurality of switching devices is
Answer signal transmitting means for outputting the answer signal indicating the state after the opening / closing operation according to the operation signal received by the first receiving means to the transmission line;
A device number setting means for setting the operated device number;
Driving means for performing the opening and closing operation according to the operation signal;
Detecting means for detecting a state after the opening / closing operation by the driving means,
Upon completion of the opening / closing operation by the driving means, the answer signal including the state detected by the detecting means and the equipment number set by the equipment number setting means is sent to the transmission line according to the answer start timing. The electric switching system according to claim 4, wherein transmission is started.

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