JPS5833799A - Selection control system for remote monitoring - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention provides a selective control method for a remote monitoring side-turning system, I! ! #) Regarding the interlock method of selection control, that is, the interlocking suppression method, selection control is performed safely and reliably.

Generally, in remote monitoring and control systems, multiple types of machines installed at unmanned controlled stations located far away from a centrally located manned control center are remotely controlled.
A high degree of reliability is required.

In particular, in recent years, as large-scale centralized monitoring and control has become possible due to the unification of transmission formats and the use of computers, It became necessary to remotely control the device on the side using the device on the control center side, that is, on the parent bird side.
Therefore, the master station device is required to have a high degree of reliability.

However, in the conventional selection control system of this type, the controlled control is controlled by the sequential timings (a) to (1) shown in each waveform of FIG. Equipment selection control was performed according to the following procedure.

(a) At the control station i, the selection code input t is supplied from the man-machine interface J to the master station device.

Cb) Under the condition that the selection completion signal 16 is sent from the parent horse device, the foal device! A selection signal /d is sent out as a lower) signal for the lower part.

(c) At the controlled station, the slave station device! A selection code output 12 is supplied from the relay board 4 to the relay board 4.

(d) If the result of the selection code verification performed by the relay board tK is good, the relay board 4 also supplies the selection completion input 11 to the colt device SVC.

(→ Send the selection completion signal /j as an uplink signal from the slave station device S to the master station device S.

(f) Supply the selection completion output 16 from the @jl device to the man-machine interface 3.

(g) After confirming the M selection completion output /6 at the man-machine interface 3, supply the control code output 9 from the man-machine interface 3 to the master station device.

■ Send a control signal // from the parent horse device SK to the foal horse device SK.

C phantom slave station device! Control code output 13 to relay board O
supply.

(j) The relay panel 6 supplies the device control output 17 to the specific device 7 selected by the selection code output/JK.

(Company) Human-powered control code supplied from man-machine interface Z to AS equipment! Reset.

■Reset the control signal // sent from the parent station to the slave station.

(b) Slave station device! The control code output 13 supplied from the relay board 4 is reset.

(n) Reset the device' control output 17 supplied from the relay panel 6 to the specific device 7.

(o) Reset the selection code t supplied from the 1-machine interface 3 to the AWT device.

(p) From the master station device to the slave station device! The selection signal 10 that is being sent to is reset.

(q) The selection code output 12 supplied from the slave station device S to the relay board 4 is set to hot.

(r) Reset the selection completion manual/41 supplied from the IJ controller 6 to the slave station jK.

(s) Reset the selection completion signal /1 sent as an upper signal from the slave station device j to the master station device j.

(t) Reset the selection completion output 16 supplied from the master station device to the man-machine interface 3.

In the selection control according to the above procedure, the normal signals sent and received between the master station device reference and the slave station device j are transmitted by sequentially and periodically repeating a certain amount of information, so the timing ( a) to (b), (d) to (e), (gl
From (sha), ω to (sword, (0) to (p) and (τ
) to (8), a time delay of seconds may occur.

On the other hand, the selection signal 710 and the control signal 1/ transmitted from the master station device DA to the slave station device 5r1c are generally the same information word,
Since the transmission is performed using the timing (− and (ψ
A case may occur in which the resets overlap and the respective resets are performed at the same time. Furthermore, in a state where the selection completion signal /S sent from the controlled station is reset due to the occurrence of some abnormal situation after timing (j),
When the operations at timings (k), (0), and (a) are performed continuously, the selection code output/2 supplied to the relay panel 4 is changed and the control code output 13 is reset at the same time. A condition occurs. Therefore, if the device control output jJ/7 to be supplied to each controlled device 7K II 5JIJ is created by matrixing the selection code output 12 and the control code output 13 in the relay panel 6, erroneous outputs may occur. The disadvantage was that there were risks involved.

FIG. 3 shows an example of a mode of malfunction that causes the above-mentioned erroneous output. In the Thai-den/Guchiyad shown in the figure, as can be seen by comparing the timing chart during normal operation shown in FIG. 2, the selection completion signal /f is reset due to some abnormal situation at time AK, and therefore, Tiring at time BK (control code output 1 at -)
3 is reset, the current selection control An
The controlled device 7 of An is shifted to the selective control of the controlled device 7 of the abuser, and the controlled device 7 of An? Selection code output for /
There is a possibility that the device control output for the controlled device W7 of An selected according to JK will be supplied.

SUMMARY OF THE INVENTION An object of the present invention is to provide a selection control system for remote microscopic viewing that eliminates the above-mentioned conventional drawbacks and allows selective control of controlled devices to be carried out safely and reliably.

That is, in the interpreter control method of the present invention, after sending a device selection signal to the slave station device in the master station device of the Tatsutako control department, the device monitors the selection completion signal from the child device, and The present invention is characterized in that when an abnormality is detected in the falling edge of the selection completion signal, the transmission of the device control signal to the slave station device is stopped.

The present invention will be described in detail below with reference to the drawings.

An example of selective control of foal-side controlled equipment according to the method of the present invention is shown in the tie-on chart shown in FIG. The timing (f) in the conventional method shown in FIG.
If the selection completion signal /S sent from the foal device 3 is reset in the period before time 0 (timing conflict when the selection signal lσ is reset after the selection signal lσ is reset at time 0), the parent When the selection completion signal n of the station equipment IK falls 9
In response to the detection, the selection signal 10 and control signal it to be sent to the child station device 3 are immediately reset, and the selection signal lσ and control signal 1/K to be sent to the foal device jK from that point O onwards. Therefore, sufficient time has elapsed for all of the selection code output 12 and control code output 13 supplied from the colt device j to the relay board 4 and the device control output supplied from the relay board ≦ to the controlled device 7 to be reset. Until then, it is locked and maintained in a reset state, so that selection control for the primary controlled device 7 is not started as described above with reference to FIG.

As a result, as mentioned above, even if the selection completion signal 13 for the controlled device under selection control is reset before proper timing due to the occurrence of some abnormal situation, the slave station device! By changing the selection code output 12 and controlling code output/1 (D reset) supplied to the relay board B from This effect can be obtained.

In addition, the selection completion signal/
The period for detecting the jO fall is the timing shown in the second figure (
g) Alternatively, the period after the company (company) may be set, and the foal device jl' (selecting signal 10 and control signal l/l) may be used as a condition for releasing the locked state. Various conditions can be set as long as necessary time is secured for resetting the selection code output 12, control code output 13, and device control output 17 described above. Further, in the above embodiment, the condition is that both the selection code output /2 and the control code output /3 are reset, but the condition may be that only the control code output 13 is reset. can.

As is clear from the above description, according to the present invention, the risk of causing an erroneous control output from the slave station device on the controlled side can be reduced by output control on the side of the master station device in the remote monitoring control system. Therefore, even if the interlock for suppressing interlocking of the foal device on the controlled station side is insufficient, the control can be performed on the master station side and high reliability can be obtained as a remote monitoring control system.

[Brief explanation of drawings]

FIG. 3 is a timing chart showing an example of the selection control shoulder, FIG. 3 is a timing chart showing an example of the discussion operation, and FIG. l...Control center, K...Controlled center, 3.
...man/i-synthesis interface, da...master station device,! ... foal device, 6... relay board,
7... Controlled device, l... Selection code input, 9... Control code input, 10... Selection signal,
ll...-control signal, 12...selection code output, /
J... Control code output, tq... Selection completion input, /
3-...Selection completion signal, ll...Selection completion output, n
...Equipment control output.

Claims (1)

[Claims] After sending a device selection signal to the slave station device in the remote monitoring control system's master station device, the selection completion signal from the colt device is checked and an abnormality is detected in the falling edge of the selection completion signal. 2. A selection control method for remote monitoring, characterized in that: 2. a selection control method for remote monitoring;