JP2568295B2 - Control output coordination device in remote control device - Google Patents

Description

Detailed Description of the Invention [Industrial applications]

The present invention is a remote control device having a plurality of relay units that directly output a relay control output to a plurality of control target devices belonging to the same series such as the same voltage class, and only one relay unit performs the control output at the same time. The present invention relates to a control output cooperation device in a remote control device for achieving such cooperation. In the drawings below, the same reference numerals indicate the same or corresponding parts.

[Prior art]

FIG. 5 shows a conventional system configuration example of a control output unit in this type of remote control device. In the figure, 01 is a master station that controls the remote control device as a whole, 02 is a serial transmission circuit, and 03 is a slave station that receives a command from the master station 01 via this line 02 and controls the controlled device 9. . One slave station 03
It is assumed that the controlled devices 9 controlled by the above belong to the same series at least according to the division such as the voltage class. 1 is the main body of communication with the master station 01 and this slave station 03
A slave MPU unit for controlling the whole, 8 is a relay unit for directly giving a control output by a relay to a controlled device 9, 7
Is a process input / output device (hereinafter abbreviated as Pio unit) controlled by the slave station MPU unit 1 via the local network (transmission line) 2 as a serial transmission line to operate the relay unit 8. Further, 4 is in the Pio unit 7, and an MPU device that is a main body of control in the Pio unit 7, LB is a local bus, and 3 is an interface for the local network 2 side under the control of the MPU device 4. A network interface device, 6 is a control output device that also serves as an interface to the relay unit 8 under the control of the MPU device 4, and 5 is another Pio in the same slave station.
It is a Dio device that communicates digital signals with the unit 7. By the way, in the case where only one control target device 9 is controlled at the same time in the system as shown in FIG. 5 (when so-called simultaneous control is prohibited), the following method is used alone or in combination. Was used. (1) In a state where any one of the control output devices 6 in the Pio unit 7 shown by the broken line operates the relay unit 8 and controls any one of the control target devices 9, the host device (subordinate station MPU unit) ) When a new control output data is sent from 1 to the Pio unit 7 via the local network 2 and the interface device 3, the MPU device 4 of the Pio unit 7 determines that the data is abnormal and performs an abnormal process as a method. Of the same Pio
(2) By using the Dio device 5 between the plurality of Pio parts 7 to monitor whether another pio device 7 is currently in control output or not. When the control output data is sent from the host device 1 to the own Pio unit 7 even though the unit 7 is in the control output state, the abnormality processing is performed in the same manner as (1) above.
Method performed by MPU device 4, (3) Method of locking by software processing so that simultaneous control output is not performed to each Pio unit 7 in host device 1.

[Problems to be Solved by the Invention]

However, the above-mentioned conventional simultaneous control prohibiting method has the following problems. (1) Since monitoring of a plurality of control outputs (simultaneous control) at the same time is not performed by the control output device 6 or the relay unit 8 at the end of the system, the host device 1 or the MPU device 4 of the Pio unit 7 If you overlook the software monitoring of, simultaneous control will occur, and there is no way to prevent this. (2) Further, this cannot be prevented even if simultaneous control is generated due to an abnormality in the control output device 6 or the relay unit 8. (3) The equipment for monitoring between the Pio units 7 increases, and the processing of the MPU device 4 of the Pio units 7 becomes complicated. Therefore, an object of the present invention is to provide a control output coordinating device in a remote control device that can solve this problem.

[Means for Solving the Problems]

In order to solve the above-mentioned problems, the device of the present invention provides a "main station (01, etc.) and the main station and a first transmission line (line 02, etc.).
Is a gap control device for controlling a plurality of control symmetrical devices (9, etc.) of the same series, and the slave station is A plurality of relay units (8, etc.) for directly giving a control output (19, etc.) of a relay to the control target device are provided, and based on a command of the main station received via the first transmission line, For giving the control output to the control target device specified by a command,
Further, in the remote control device in which only one relay unit is to operate at the same time in the slave station, a second transmission line (relay unit coupling bus 10 or the like) connecting the relay units in the slave station is provided. ) Is provided to each of the relay units, and a lock signal (control lock request signal) indicating that the control output should be locked via the second transmission line when the relay unit is performing the control output. 16) and a means for transmitting the lock signal (such as the bus transmission section 11) and the relay unit receives the lock signal (as another unit control signal 17) via the second transmission path (and the bus reception section 12). When it does, the nest group that locks the control output from the relay unit (relay A1
And so on) ”.

[Work]

In the same slave station, a common coupling bus for coupling the relay units at the terminals to the controlled devices is provided, and the control outputs are coordinated between the relay units via this bus.

【Example】

An embodiment of the present invention will be described below with reference to FIGS. FIG. 1 shows a system configuration of a control output section in a remote control device as an embodiment of the present invention, and corresponds to FIG. According to the present invention, as shown in FIG. 1, the relay units 8 in the same slave station are connected to each other by the dedicated bus 10, so that the relay unit 8 which is in the control output mode is connected to another relay unit 8 as described later. The request to lock the control output is sent to the combined bus 10, and the other relay unit 8 receives the request to lock the control output from the combined bus 10.
The request locks the control output, which allows only one device to make a control output in the same time. FIG. 2 is a block diagram showing an embodiment of the configuration of the relay unit 8 in FIG. As shown in FIG. 2, the relay unit 8 includes a bus transmitter 11, a bus receiver 12, and a control output unit.
A control data receiving unit 14, a signal transmitting unit 15, and the like are provided. Next, the operation of FIG. 2 will be described. The relay unit 8 receives the control data 18 from the control output device 6 and the control data receiving section 14
To receive via. The control data 18 is composed of a position code for selecting one of a plurality of control target devices 9 and a control code indicating the control content, and the control output unit 13 uses a relay matrix in accordance with the content of the control data. The control output 19 of the relay is output to the controlled device 9, the control lock request signal 16 is notified to the bus transmission unit 11, and the control lock request signal is sent to the relay unit coupling bus 10. On the other hand, the other relay unit 8 that has received the control lock request signal 16 from the relay unit coupling bus 10 via the bus reception unit 12 notifies the other unit control signal 17 to the control output unit 13 and locks the control output 19. At the same time, the control output device 6 is notified via the signal transmission unit 15 that the relay unit 8 is currently under control lock. FIG. 3 shows an embodiment of the main part of the internal circuit of the control output unit 13 in FIG. In FIG. 3, S1 to Sn are plural (n
Contact) of the position relay for selecting one of the control target devices 9), and the control output device (FIG. 2, 6).
One of the contacts S1 to Sn is turned on according to the position code in the control data 18 sent from. 1X to nX are relays provided in series with the contacts S1 to Sn, respectively, and 1Xa to nXa are a contacts that operate by energizing the relays 1X to nX, respectively. A1 is a relay energized by the control signal 17 during control of another unit, and A1b is its b contact. The b contact A1b is provided in series with the relays 1X to nX. OP and CL are the contacts of the control relay that select the contents to be controlled.The contacts OP and CL are set according to the control code in control data 18.
One of them turns on. OPX and CLX are relays energized by turning ON the contacts OP and CL, respectively, and OPXa and CLXa are a contacts of the relays OPX and CLX, respectively. Note that Vs is the contact 1 Xa to n Xa,
It is a power supply given to the controlled device 9 via OPXa and CLXa. Next, the operation of FIG. 3 will be described. When certain control data 18 is transmitted from the control output device 6, the position relay contact S1
One of the contact points designated by the position code of any one of .about.Sn turns on and the relays 1X to nX, and hence any of the a contact points 1Xa to nXa corresponding to the designated contact point turn on.
Further, one of the control relay contacts OP and OL selected by the control code is turned on to turn ON the relay OPX or CLX corresponding to the selected contact, and thus either the a-contact OPXa or CLXa.
N and control output 1 to any one of the controlled devices 9
9 is given. However, while the other unit control signal 17 is being input, the contact A1b of the relay A1 is turned off by the relay A1 being turned on, so that the relays 1X to nX are not turned on and the control output to the controlled device 9 is locked. Will end up. In addition, even if the control data and the signal during control of another unit 17 are input at the same time, the control output will be locked, so that at any timing the relay unit coupling bus 10
It is impossible for a plurality of relay units 8 to simultaneously perform control output in the relay unit 8 to which is connected. FIG. 4 shows an embodiment of a circuit of an interface portion between the relay unit coupling bus 10 and the relay unit 8 of the bus transmitting unit 11 and the bus receiving unit 12 of FIG. The bus transmitter 11 is connected to the corresponding signal line of each relay unit 8 on the bus 10. That is, in FIG. 4, since the bus transmission unit 11 is connected to the bus B1, the relay unit 8 is connected to the unit 1
The bus transmitter 11 is connected to the bus B2 in the relay unit 2 and to the bus Bm in the relay unit m. A control lock request signal is sent to this relay unit 8.
When 16 occurs, the bus transmission unit 11 causes N (ground) of the signal bus line (bus B1 in this example) via the relay A2.
Drop to. On the other hand, the bus receiver 1 is a signal bus line other than the signal bus line to which the bus transmitter 11 in its own relay unit is connected, that is, the signal bus line to which the bus transmitter 11 of another relay unit 8 is connected. All of them are monitored, and when one of the signal bus lines is dropped to the ground N by the control lock request signal 16 of the other relay unit 8, another unit controlling signal 17 is generated via the photocoupler PT.

【The invention's effect】

According to the present invention, it comprises a master station 01 and one or a plurality of slave stations 03 connected to the master station via a line 02, and at least each slave station 03 controls a plurality of control target devices 9 of the same series. In the remote control device, the slave station 03 includes a plurality of relay units 8 for directly providing the control output 19 of the relay to the control target device 9, and the slave station 03 of the master station 01 received via the line 2 The control target device 9 specified by this command based on the command
In the remote control device for providing the control output 19 to the relay unit 8 and only one relay unit 8 is to operate in the slave station 03 at a time. A relay unit connection bus 10 for connecting the relay units is provided, and the control output 19 is locked to each of the relay units 8 via the relay unit connection bus 10 when the relay unit 8 is performing the control output 19. Based on the control lock request signal 16 via the bus transmitter 11 as a means for transmitting the control lock request signal 16 indicating that the relay unit 8 is to be connected, the relay unit coupling bus 10 and the bus receiver 12 Other unit control signal output 17
Since the relay A1 as a means for locking the control output 19 from the relay unit 8 is provided when the signal is received, the following effects can be obtained. (1) In the unlikely event that software monitoring in the host device is bypassed and control data is sent to multiple relay units at the same time, the relay units at the end monitor and coordinate with each other. Since the control is not output to the two controlled devices, the reliability of the system is improved. (2) Furthermore, since the equipment, wiring, etc., which was conventionally prepared for monitoring the status between Pio parts, only requires cables to connect between relay units, it is possible to eliminate the increase in equipment. .

[Brief description of drawings]

1 is a block diagram showing a system configuration as an embodiment of the present invention, FIG. 2 is a block diagram showing an embodiment of the configuration of the relay unit shown in FIG. 1, and FIG. 3 is a control output unit shown in FIG. FIG. 4 is a circuit diagram showing an embodiment of the configuration of the main part of FIG. 4, FIG. 4 is a circuit diagram showing an embodiment of the configuration of the bus transmitting unit and the bus receiving unit of FIG. 2, and FIG. 5 is a conventional system corresponding to FIG. It is a block diagram. 01: Master station, 02: Line, 03: Slave station, 8: Relay unit, 9: Controlled device, 10: Relay unit coupled bus, 11: Bus transmission unit, 12: Bus reception unit, 13: Control output unit, 16 : Control lock request signal, 17: Other unit control signal, 19: Control output, A1:
relay.

Claims (1)

(57) [Claims] 1. A remote control device comprising a master station and one or a plurality of slave stations coupled to the master customer via a first transmission path, and at least each slave station controls a plurality of control target devices of the same series. The slave station is directly provided with a plurality of relay units for giving a control output of a relay to the control target device, and based on a command of the master station received via the first transmission path. In the remote control device, which provides the control output to the control target device designated by this command, and only one relay unit at a time should operate in the slave station in question, A second transmission line for connecting each relay unit in the station is provided, and when each relay unit is performing the control output, Means for transmitting a lock signal to the effect that the control output should be locked via the second transmission line, and the control from the relay unit when the relay unit receives the lock signal via the second transmission line A control output coordinating device in a remote control device, comprising: means for locking an output.