JPH01181175A - Equipment controlling system for control system - Google Patents

Abstract

PURPOSE:To prevent the runaway of an equipment to be controlled by securing such a constitution where the transmission of a start command given from a master station is stopped when a switch is turned off at an operating part and the drive of the equipment to be controlled is stopped after the end of the control signal produced from a control station right before the stop of the drive of the equipment. CONSTITUTION:The ON state of a control switch of an operating part 10 is detected by a state detecting part of a slave station 11. The station 11 transmits the ON state signal to a master station 12. The station 12 receives the ON state signal and sends this to a network 13 with actuation of a periodical start command generating part 121. Thus the ON state signal is received by a controller 14. The controller 14 decodes a command via a command decoding part 141 and a prescribed length control signal generating part 142 produces a period control signal longer than the command transmitting period for control of an equipment 15 to be controlled. The controller 14 stops the generation of the control signal if no control command is received and stops the drive of the equipment 15.

Description

[Detailed Description of the Invention] [Summary] This invention relates to an equipment control method in a management system that monitors and controls a central computer and a large number of control terminal devices connected through a network, and in management systems such as fire prevention management and building management. Even if a transmission line error, link breakage, or other failure occurs after starting up a controlled device installed in a remote location from the operation unit, the system can be controlled.
'n The purpose is to provide a device control method in a management system that can prevent devices from running out of control, and an information processing device and a control device are connected via a network, and a control signal is output from the control device. In a management system in which a controlled device is driven during a period of time, when the operation section detects the on state of a switch for controlling the device, the state detection section generates an output, and the information processing device that receives the output outputs the output. , a start command is sent to the network at fixed time intervals by specifying the corresponding controlled device, and each time the control device receives the start command from the network, the control device sends a start command to the network for a period longer than the fixed time interval. The device is configured to generate a long control signal, and to start the controlled device when the control signal is generated and to stop when the control signal disappears.

[Industrial Application Field] The present invention relates to a device control method in a management system that connects a central computer and a large number of control terminal devices via a network to perform monitoring and control.

In recent years, various systems have been constructed by connecting a computer main body and a plurality of terminal devices through a network such as a LAN. Some of these systems are not only for administrative purposes (for example, there are management systems for buildings, factories, etc., management systems for disaster prevention, etc.).

In such a system, operations of remote controlled devices may be controlled by instructions from an operator from a central management console. To give a specific example, in a disaster prevention system, for example, the angle at which extinguishing agent from fire extinguishing equipment is spouted may be controlled.

When performing such control, conventional control methods may not be able to control the controlled equipment as specified due to errors occurring on the transmission path, making it difficult to realize a reliable control method. desired.

[Conventional technology] FIG. 3 shows the configuration of a conventional example.

In FIG. 3, 30 is an operating section such as a key or a switch;
1 represents a slave station equipped with an input detection section, 32 a master station equipped with an information processing function, 33 a network, 34 a control station, and 35 a controlled device.

The operation of the configuration shown in FIG. 3 will be explained using the time chart shown in FIG. 4.

First, a controlled device is specified on the operation unit 30, and a switch (a reset type switch or key that returns after being pressed) for starting the device is turned on. When the signal from the switch representing this activation is generated as shown in Fig. 4, the slave station 31
It is detected by the input detection unit of the controller and sends a control signal indicating activation to the master station 32.

When the master station 32 receives this, a startup control signal specifying the controlled device is generated from the startup control signal generating section 321 and transmitted to the network 33 as shown in FIG. 4C.

When the control station 34 receives the activation control signal from the network 33, it is decoded by the decoding unit j41 and the activation control signal is supplied to the control signal generation unit 342.

As a result, the control signal generator 342 operates as shown in FIG.

The controlled device 35 is started by generating a starting signal (drive signal) as shown in FIG. The activated controlled device 35 continues to be driven until the activation signal stops.

If you want to stop this controlled device 35, use the operation section 30.
When the stop switch (reset switch or key similar to the start switch) is operated and turned on, the input detection section of the slave station 31 receives a signal from the switch indicating a stop as shown in the opening in FIG. When the detection is detected and an output is sent to the master station 32, the master station 32 receives this and generates a stop control signal from the stop control signal generator 322, as shown in FIG.

It is transmitted to the network 33 as shown in FIG. Control station 3
When this is received at step 4, the decoder 341 decodes it and supplies a stop signal to the control signal generator 342. As a result, the generation of the activation signal that has continued to occur since receiving the activation output is stopped as shown in 2 of FIG. 4, and the driving of the controlled device 35 is completed.

[Problems to be Solved by the Invention] According to the configuration of the conventional example, as shown in the time chart of FIG. Since the control signal (drive signal) continues to be generated until the signal is received, for example, if the stop control signal does not reach the control station due to a transmission error (parity error due to code distortion, etc.) or link breakage on the network, The stop control signal may not be detected due to noise.

In such a case, there is a risk that the controlled device may continue to be driven indefinitely, causing the device to run out of control, making it difficult to operate the management system normally.

In a management system such as fire prevention management or building management, the present invention is designed to prevent the control equipment from operating even if a failure such as a transmission line error or link disconnection occurs after a controlled equipment installed in a far corner is activated from the operating unit. The purpose of this invention is to provide a device control method in a management system that can prevent runaway operations.

[Means to solve the problem] The basic configuration of the present invention is shown in FIG. 1 (al).

In FIG. 1(a), 10 is an operation unit, 11 is a slave station, 1
2 is an information processing device (master station), 13 is a network work, 14
1 represents a control device (control station), and 15 represents a controlled device.

According to the present invention, when a control switch is turned on at the operation unit, the slave station detects it, sends an on-state signal to an information processing device (hereinafter referred to as the master station), and when the master station receives the on-state signal, A command (control message) for starting the ITL controlled device is sent to the network at regular intervals. :b When the control device (hereinafter referred to as the control station) receives this command (control message), it generates a control signal to start the controlled device for a period longer than the command transmission cycle each time, and if the command does not arrive, The generation of the control signal is stopped and the drive of the controlled device is stopped.

[Operation] A time chart for explaining the present invention in detail is shown in FIG.
Shown below.

To explain the operation of FIG. 1(al) with reference to FIG.
The acid switch SW is maintained in the on state as shown in FIG.

The state of this switch SW is detected by the state detection section of the slave station 11, and a signal representing the on state is sent to the master station 12.

When the master station 12 receives this on-state signal, the periodic start-up command generation unit 121 operates, and the controlled device 12 is activated at a constant cycle while the switch is on-state.mbt.
(of course, also specifying the control station) and sends a start command to the network 13 as shown in (1).

A large number of control stations are connected to the network, and the designated control station 14 receives a command addressed to its own station, decodes the command with the command MH5'LJ 141, and sends it to the designated controlled device. 15, an output signal is generated and supplied to a predetermined length control signal generator 142.

As a result, the predetermined length control signal generating section 142 is activated as shown in FIG.
As shown in (c), the controlled device 15 is driven by generating a control signal that lasts for a period of time T, which is longer than the time t of the command generation cycle of the master station.

The predetermined length control signal generation unit 142 of this control station generates control No. 13 for a predetermined length of time in response to a start command from the master station, and when a subsequent start command arrives when the control signal does not disappear, the control signal generator 142 generates control signal No. 13 for a predetermined length of time in response to a start command from the master station. (blha.

It has a restart function as shown in the figure below.

In this way, while the switch SW of the operation section continues to be in the ON state, the activation command continues to be periodically generated from the master station 12, and the control signal of a predetermined length generated from the control station 14 is repeatedly reset. The control signal output is equivalent to being generated continuously. Therefore, the controlled device 15 is driven by control inputs as shown in FIG.

When the switch SW of the operation unit 10 is returned to the OFF state by the operator's operation, the transmission of the startup command from the master station 12 is stopped, and therefore the control signal generated immediately before is transmitted from the control station 14 for a predetermined period of time (T). If it ends later, the controlled device 15
Stops driving.

Because it operates in this way, when controlling equipment by turning on and off switches (for example, fine-tuning direction control, etc.), even if a transmission error or disconnection of the transmission link occurs during control operation, the controlled equipment will not go out of control. can be prevented from happening.

[Example] The configuration of an embodiment of the present invention is shown in FIG. 2 (al).

In Figure 2 (al), 20 is the console, 21 is the graphic panel, 22, 23 is the input/output control device, 24 is the CPU, RAM, and devices such as the ink face circuit (1, F,) for each I10 unit. information processing device, 25
- 28 are each node of a ring type LAN (local area/name node work) configured with an optical fiber 29 as a transmission line, 40 - 42 are human output g stations (for output of equipment control and input of monitoring data), 43 ~45 represents a controlled device (or condition sensing device).

The configuration of this embodiment is such that an operator can control the fire extinguishing equipment in each part of the building by operating the switches on the keyboard of the console 20 while looking at the graphic panel 21 placed in the central monitoring and control room. This figure shows a system for controlling a fire extinguisher, which is a control device.

In addition, in the configuration of this embodiment, the console 20, the human output control device 22, 23, the information processing device 24, and the input/output bag have 40~
42 correspond to the operation unit 10, slave station 11, master station 12, and control station 14 in FIG. 1 (al), respectively.

The control operation according to the configuration of this embodiment will be explained using an explanatory diagram related to No. 43 of the embodiment shown in FIG. 2 (bl).

When the operator looks at the graph panel 21 (or due to an alarm), the controlled device 44 belonging to the input/output device 41 (
Press the corresponding switch (not shown) on the console 20 to drive the device that controls the extinguishant discharge angle (
(Startup Control) Then, the input/output control device 22 operates as shown in FIG.
) As shown in (a) to (a) to an+l, the switches on the console 20 are constantly scanned at a constant cycle, so the ON state of the switch can be immediately detected.

Upon detecting the on state, the input/output control device 22 operates as shown in FIG.
As shown in (bO-bn-1) at the beginning of bl, the information is sent to the information processing device 24, and the information is sent each time the on state is detected.

Upon receiving this on-state information, the information processing device 24 sends a startup command from the LAN node 25 to the softwork with the input/output device 41 as the destination at a constant cycle (irrespective of the scanning cycle of the console). The startup command (or control message) is shown in Figure 2 (c in bl).
-3.

When the node 27 connected to the destination input/output device 41 identifies the destination (address) of the data on the highway of the optical fiber 29 and detects that it is a control message specifying the input/output device 41, the data is A control signal for driving the controlled device 44 is generated for a certain period of time by taking in the message and decoding the message (dO of the second 1b)...).

This starts the control operation, but the information processing device 24
If the activation command from 03 in FIG. Controlled equipment 4
The discharge angle control operation in step 4 stops.

After the interruption, a startup command (
When C4) in tbl of FIG. 2 is detected again by the input/output device 41, the input/output device 41 generates an activation control signal (d4) to the controlled device 44.

In the case of tbl in FIG. 2, the activation command from the master station is not detected (does not arrive) at the control station again, so the drive to the controlled device is interrupted, but then the input/output device 41
A start command is detected and a control signal is generated. When the switch on the console 20 that has been on is turned off by the operator, the input/output control device 22 reads the switch (a
n←1), the on-state signal from the input/output control device 22 to the information processing device 24 stops, and the transmission of the startup command also stops, so the startup control signal from the input/output device 41 to the controlled device 44 disappears after a predetermined period of time. . Figure 2 shows an example of the control flow of each part to generate a control signal to the controlled device.
C) Example 1 and FIG. 2 (dl Example 2).

Example 1 in FIG. 2 (C1) shows a control flow when transmitting and receiving signals in the format shown in the time chart in FIG. The input/output control device 22 scans and reads whether the switch (switch) is on every 0.4 seconds (400 milliseconds) (500 in Fig. 2 (C1), and when it is on, the switch is on. When the information processing device 24 receives a signal from the input/output control device 22, it sends a start command to the controller each time (520.530).

When the input/output device 41 receives this activation command via the node 27, it drives a control signal generator provided in the input/output device to generate a control signal that lasts for 0.5 seconds (550). The control signal stops as shown in FIG. 2 tbl if no activation command is received.

As the control signal generation section provided in the input/output device, if it is configured in hardware, for example, a signal generator such as a monostable multi-by-break that can be retriggered can be used, and it goes without saying that it can be generated in software. Nor.

Next, to explain example 2 of the control flow shown in Fig. 2 +d+, the push buttons on the console are
The button is scanned every second (0.4 seconds in tc in Figure 2) to determine the state (600 in Fdl in Figure 2), and when the input/output control device 22 detects that it is on, it indicates that the push button is in the on state. An instruction signal indicating that the signal is for a large number of times (in this example, five times) is sent out. In other words, one signal represents five on-state signals (one signal corresponds to 0.4 seconds).

This is done because the information processing device 24 receives and processes requests from a large number of devices such as multiple input/output control devices 22 and 23 and networks, but if the request generation cycle is short, it will be overloaded. Therefore, this is to reduce the burden.

When the 111 information processing device 24 receives this on-state signal (5 times), it sends a start command every 0.4 seconds specifying the controlled device of the corresponding input/output device, and sends it a total of 5 times (
620.630).

When the start command is received by the input/output 'AW 41 via the node 27, it sets 5 in the register No), the control signal generator (not shown) is immediately driven to generate a control signal lasting 0.5 seconds (
670).

After the drive control is reset, the contents of the register X are incremented by 1, and at a timing of 0.4 seconds, the flow returns to the control flow for generating control signals (660 to 690), and control signals are sequentially generated. Additionally, if a startup command is received,
Since 5 is set in register X each time, the control signal continues to be generated for at least 2 seconds after receiving the last activation command.

[Effects of the Invention] According to the present invention, compared to conventional control systems that generate start and stop control signals singly, it is possible to prevent transmission errors, device runaway due to link disconnections, and malfunctions due to noise. be able to.

This also makes it possible to improve reliability in device control.

[Brief explanation of the drawing]

Figure 1 fat is a diagram showing the principle configuration of the present invention, Figure 1 t
bl is a time chart explaining the present invention in detail, FIG. 2 (al is a diagram showing the configuration of an embodiment of the present invention, FIG. 2 tb+
is an explanatory diagram of the signal relationship of the embodiment, and Fig. 2 (C1 and Fig. 2 f
dl is a diagram showing examples 1 and 2 of the control flow of each part of the embodiment, FIG. 3 is a diagram showing the configuration of a conventional example, and FIG. 4 is a diagram showing a time chart of the conventional example. Figure 1 (in al) 10: Operation unit 11: Slave station 12: Information processing device (master station) 13: Network 14: Control device (control station) 15: Controlled equipment

Claims (1)

[Claims] In a management system in which an information processing device (12) and a control device (14) are connected via a network, and a controlled device (15) is driven while a control signal is output from the control device. , When the operation unit (10) detects the on state of a switch for controlling the device, the status detection unit (11) generates an output, and the information processing device (12) that receives the output determines that the output exists. During the period, a start command is sent to the network at fixed time intervals (t) by specifying the corresponding controlled device, and when the control device (14) receives the start command from the network, the control device (14) sends the start command to the network at the fixed time interval each time. A device control method in a management system, characterized in that a control signal with a longer time length (T) is generated, and a controlled device (15) is started by the generation of the control signal and stopped by the disappearance of the control signal.