JPS63296495A - Confirming device for remote equipment operation - Google Patents

Abstract

PURPOSE:To surely perform inching operation without being affected by the delay of information transmission by accepting stop operation following start operation or the start operation following the stop operation without inputting any answer-back signal for field equipment whose state is to be confirmed by the inching operation. CONSTITUTION:A monitor controller 2 is provided with a means which judges the kind of the field equipment 7 to be operated according to the operation input of a remote operation switch and a means which accepted one operation input succeeding the other operation input in start/stop operation without any answer-back signal from a field input/output device 6 when it is judged that the field equipment to be operated is equipment which should perform predetermined inchining operation. Then an operator performs the stop operation following the start operation or the start operation following the stop position with respect to the field equipment 7 whose state is to be confirmed from a center control room. Consequently, even if the information transmission is delayed, the field equipment 7 surely carries out inching operation.

Description

DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Industrial Application Field) The present invention is directed to the normal operation of field equipment located remotely from a central control room in a plant operation system.

The present invention relates to a remote device operation confirmation device suitable for confirming abnormalities.

(Prior art) In plant operation systems such as power plants, for example,
When continuously operating on-site equipment that makes up various plant systems that are driven by electric motors such as pumps, the central control room must be inspected in order to confirm that there are no problems with the installation, rotation direction, etc. prior to continuous operation. Since then, the on-site equipment has been operated in small increments.

This inching operation is performed by starting the operation switch, and immediately stopping the operation switch after confirming via answerback that the start command has been transmitted to the site, or vice versa, causing the field equipment to instantaneously operate. Or it is an operation to stop it.

By performing this inching operation from the central control room, a person stationed at the site can confirm that there are no abnormalities in the equipment.

In this way, in the plant operation system.

In order to avoid continuous operation of field equipment under abnormal conditions, the above-mentioned inching operation is always performed during the plant construction stage and when starting up after periodic inspections. Further, the operation time of the inching operation is set to be extremely short so that the device does not actually start moving or stop.

(Problem to be solved by the invention) However, recent plant operation systems have become larger, more precise, and more sophisticated, and the number of information lines exchanged between the central control room and each site is extremely large. It has become to. If all of these information lines were to be implemented using one signal line each, the number would be enormous. Therefore, in recent plant operation systems, information is multiplexed by connecting the central control room and each site in a loop using optical cables, etc., but the central control room creates information for each site in sequence. , on the other hand, each site must wait their turn to take in this information, and wait their turn to send the necessary information back to the central control room, resulting in a delay in information transmission. Therefore, even if a command to start up the field equipment is issued from the central control room for inching operations to check the operation of the field equipment, there is no response from the field input/output device that the startup command has been input to the field equipment. It takes time to check the background. Furthermore, even if a stop command is issued immediately after confirming the operation of one piece of equipment, it takes time for the stop command to reach the field equipment and the equipment to stop, resulting in a longer drive time for the field equipment, and sometimes causing the equipment to stop working. On the other hand, if this was to be avoided, temporary switches for testing would have to be transported to the site.

SUMMARY OF THE INVENTION It is therefore an object of the present invention to provide a remote equipment operation confirmation device that solves the above problems and enables reliable inching operations without being affected by delays in information transmission.

[Structure of the Invention] (Means for Solving the Problems) The present invention provides for a stop operation or a stop operation following a start operation without inputting an answer back for field equipment whose status should be checked by inching operation. A start operation following the start command is accepted, and a stop command is output after the start command, or a start command is output after the stop command from the field input/output device to the field equipment.

(Function) The operator can perform a start operation followed by a stop operation, or a stop operation followed by a start operation for the field equipment to be checked for operation from the central control room, thereby ensuring that the field equipment is sized correctly even if there is a delay in information transmission. You will be able to perform dynamic operations.

(Example) Fig. 1 shows a configuration diagram of a remote equipment operation confirmation device according to an embodiment of the present invention, and is an example of a case where a pump is operated in small increments from a central control room via a multiplex transmission cable. . In the figure, CRT 1 is equipped with a touch screen;
When an operator touches the screen, the position is output as coordinate data. A system diagram showing the configuration of the plant is displayed on this C8-1 equipped with a touch screen, and the operator selects the symbol of the equipment he wishes to operate by touch operation. The touched coordinate data is displayed on the CRT
It is output from I to the supervisory control bag [2. The supervisory control device 2 determines the device selected by the operator based on the currently displayed screen data and touch coordinate data, and displays an operation switch display (hereinafter referred to as a touch switch) corresponding to the device to the CRTI. Let's do it. This touch switch will turn on if the selected device is a pump,
A display with selection positions equivalent to conventional hardware switches such as "#OFF 11, 11 AUTO" is displayed, and the operation is selected by touching the display.The operator selects the operation by touching the display. On the switch, touch the display for the operation you want to perform (for example, if you want to start the pump, touch the "on" display).

The supervisory control device 2 creates operation data for device operation at the timing when the touch switch is selected, and sets this to its own station 3 in the multiplex transmission system. Station 3
The data set in is transmitted to the field station 5 via the multiplex transmission cable 4, but a plurality of other stations are connected to the multiplex transmission system.
When a certain station transmits data, the processing is performed sequentially as described above, so there is always a waiting time. This point is different from the one-to-one connection configuration between the operation switch and the device in the conventional system. Therefore, the operation data set in the station 3 is returned to the field station 5 via the multiplex transmission cable 4 after this waiting time. The operation data sent to the field station 5 is processed by the field input/output device 6, and a specified signal output (contact output, analog output, etc.) is performed to the device specified by the operation data.

For example, if the operation data is a pump start request, as shown in Figure 2, the corresponding pump power breaker (hereinafter referred to as
The breaker "in" contact output a is performed from the on-site input/output bag @6 to the breaker) 7, and the closing coil 71 of the breaker 7 is energized, so the breaker contact 72 closes and the pump 8 is started. be done. At the same time, since the charging coil 71 is excited and the charging/returning contact 73 is turned on, the pump start signal C is input to the field input/output device 6, and is set to the field station 5 by the field input/output device 6.

On the other hand, if the operation data is a pump stop request.

In response to the breaker 817, the on-site input/output device 6 outputs the breaker ``cut'' contact, and the self-holding of the closing coil 71 is released.As a result, the breaker contact 72 is activated and the pump 8 is stopped. Since the breaker contact 74 is turned on due to the de-energization of the input coil 71, the pump stop signal d is input to the field input/output device 6, and is set to the field station 5 from there.

The data set in the field station 5 is input to the supervisory control device 2 via the multiplex transmission system, and the display symbol of the corresponding pump is switched to running or stopped.
Displayed on RTI.

A delay occurs in the transmission of the pump start signal C or the pump stop signal d for exactly the same reason as in the case of the operation data a or b.

In order to reliably perform the inching operation even if there is such a delay in transmission, the supervisory control device 2 performs the following processing in response to the operator's request input from the CRTI. That is, the third
As shown in Figure (a), when an operator makes an operation request via the CRTI (31), the supervisory control device 2 determines whether the device to be operated is a device that requires inching operation, such as a rotating machine. Judge (32).

As a result, if it is a one-rotation machine, it is then determined whether the operation request is a starting operation (33). The judgment process (32).

If the 1 judgment result is NO in (33), 1 normal operation process 34 is performed.

This normal operation process 34 is as shown in FIG. 3(b).

After creating operation data according to the operator's request and outputting it to the field input/output device 6 (processing 34A), this device
Checking answerback of operation data from i6 (34
Perform B) and input the answer back to complete the operation (34C). In this normal operation processing, the next operation cannot be accepted until the operation completion (34C) state is reached.

If YES in the determination processes (32) and (33), startup data for the compatible device is created and output to the field input/output device 6 (35). After the supervisory control device 2 performs the startup data output processing (35) in this manner, and before inputting the answerback signal from the field input/output bag @6, is there a subsequent stop request from the operator? A determination (36) is made as to whether or not this is the case. As a result, if a stop request is input, a stop operation process for the corresponding device is performed in 1 normal operation process 34. That is, without waiting for the answerback signal of the activation data.

The supervisory control device 2 creates stop signal data and sends the own station 3. Multiplex transmission cable 4. Output stop data to the field input/output device 6 via the field station 5 (34A)
, waits for input of an answerback signal (34[1), and completes the operation (34C).

On the other hand, in the judgment process 36, if there is no stop request,
As with normal startup request processing, the input of the answerback signal is determined (37) and the operation is completed.

In this way, the supervisory control device 2 performs the startup process when the operator requests the rotating machine to start, and when the operator requests the rotating machine to stop before inputting the answer back for the startup output, the monitoring and control device 2 performs the startup process. It receives operations only on request and performs stop operations based on normal processing. Therefore, when an operator performs an inching operation on a rotating machine, only the stopping operation after the starting operation is accepted, so the same inching operation as in the conventional system is possible by continuous operation of starting → stopping. becomes.

FIG. 4 shows the monitoring and control device 2 during the above-mentioned inching operation.
It shows the flow of signals between the circuit breakers 7. However, in the figure, the multiplex transmission cable 4 and other field stations 5
is omitted. In this figure, an operator makes a request to start a rotating machine via a CRTI installed in the central control room.
When u is performed, a command is input to the supervisory control device 2, and this is outputted from the field input/output device 6 to the power breaker 7 as a breaker closing signal a. Let the time delay of this route be T1.

In this startup process, when the field input/output device 6 receives the startup data, it transmits a startup data return signal eu as an answer back to the supervisory control device 2. It takes a time of T1 for the return signal Cυ to return to the supervisory control device 2, and it takes a total of 2T from the time the operator issues the start request ao until the time the return signal cu is input.
+ time is required. Therefore, in the conventional system, the following operation by the operator was not accepted during this 2T+ period, but in the case of the present embodiment, only the operation request for starting → stopping the rotating machine is accepted as described above. Therefore, as shown in the diagram, after the start request au, the stop request is made.
It becomes possible to do this.

This stop request bo is a start request a. A breaker clear signal is output to the on-site input/output device 6 through a similar route to the power supply breaker 78. When the output breaker is opened, the corresponding equipment is stopped.

Since the field input/output device 6 always returns input data, return data dt &
It is transmitted to the supervisory control device 2. In actual equipment, when α1 is the operation delay time of the equipment with respect to the activation signal ao, T
It starts with a delay of 1+α1, and also stops after a delay of T1+α lid in response to the stop request bo. Monitoring in the central operation will be performed with a delay of T1 relative to the movement of equipment.

The operation time T2' of the field equipment in this inching operation is
The start request ao is made by the operator at timing 1, which will be explained in the time chart of the figure. Data al is input to the on-site input/output device 6 at timing 5 and 2, and the data al is input to the breaker 7 at timing 74. A breaker ON command a is output. Then, after the operation delay time α1, at timing 5, the device is activated and enters the device operating state. During this time, the operator performs a stop request bu operation at timing 3 at an interval T3 of one hour after the start operation. This stop request signal b1 is also timed with the same time delay as the start request.
The command is input to the field input/output device 6 at timing L7, and a breaker disconnection command is output at timing L7. And the operation delay time α
1, the device becomes stopped for the first time at timing t6.

Therefore, in Figure 5, the timing + (startup request)
Expressing each timing based on , the start timing of the device is T1 + α1 (1) The stop timing of the device is T
:l+TI+αK Since the equation (2) is, the operation time (jogging time) of the device during this period T2' is calculated from equation (2) - (1): T2' = (T3+Tx+α+) - (T++αl): T
3, and the inching time can be determined by the operator's operation interval.

As described above, according to this embodiment, it is possible to perform inching operations on the on-site rotary machine from the central control room without being affected by time delays in the transmission system. Further, even if the supervisory control device cannot receive the answerback signal due to an abnormality in the transmission system, etc., according to the present embodiment, a stop operation can be performed, so that the equipment can be safely stopped.

Incidentally, in the above embodiment, the operation of the field input/output device 6 is the same as the conventional one, but by providing the field input/output device 6 with the following functions, the reliability of the inching operation can be improved. . This will be explained with reference to FIG.

FIG. 6 shows another embodiment of the present invention.
The same reference numerals as in the figure indicate the same parts, and the difference is the AN between the stop request signal b1 given to the field input/output device 6 and the pump start signal C generated when the breaker 7 operates reliably.
The point is that D61 is taken and a pump stop signal is output. This is a system in which the on-site input/output device 6 performs the confirmation operation that the operator performed based on a lamp or CRT display in the conventional technology.After confirming that the breaker is on, By allowing this, it is possible to prevent adverse effects on the breaker and equipment (pumps, etc.) due to extremely short breaker on/off operations.

Note that in one or more embodiments, the operator's operation input is CR
Although the present invention is not limited to this example, a conventional hard switch may be used, and the present invention is not dependent on the type of switch at all.

Further, in the above embodiment, the inching operation of a one-rotation machine was taken as an example, but the present invention can also be applied to checking for disconnections in circuit breakers, heaters, etc.

Further, in the above embodiment, the inching operation for instantaneous starting has been described, but it goes without saying that the same applies to instantaneous stopping.

Furthermore, it is clear that the present invention can be implemented equally well in software 1 logic or in a hard-wired relay sequence.

[Effects of the Invention] As explained above, according to the present invention, inching operations of remotely located field equipment can be reliably performed without being affected by transmission delays that occur in multiplex transmission systems in digital instrumentation control systems. This will greatly reduce the burden on the driver.

[Brief explanation of the drawing]

Fig. 1 is a block diagram of a remote equipment operation confirmation device showing an embodiment of the present invention, Fig. 2 is a circuit diagram showing a specific example of the circuit breaker shown in Fig. 1, and Fig. 3 is a supervisory control device shown in Fig. 1. 4 is an explanatory diagram of the signal flow of FIG. 1, FIG. 5 is a time chart of FIG. 4, and FIG. 6 is a remote device operation check showing another embodiment of the present invention. FIG. 3 is an explanatory diagram of the signal flow of the device. 2... Monitoring control device, 4... Multiplex transmission cable, 6
...On-site input/output equipment. , z'-7, -・ Agent Patent attorney Crest 1) Makoto □, line ＼ - Figure 1 Figure 2 Figure 3 Figure 4

Claims (2)

[Claims] (1) A remote control switch for starting/stopping field equipment located remotely from the central control room in the plant, and creating operation data according to the operation input of this remote control switch and transmitting it to the multiplex transmission system. It is equipped with a monitoring control device that outputs the output, and a field input/output device that inputs the operation data via the multiplex transmission system and outputs a start/stop signal to the corresponding field device, and operates the field device by performing inching operations. In the remote device operation confirmation device for checking the status, the monitoring control device includes means for determining the type of field device to be operated according to the operation input of the remote control switch, and a means for determining the type of field device to be operated based on the determination result. When the equipment is to be operated in a predetermined inching manner, a means is provided for successively accepting one operation input of the start/stop operation followed by the other operation input without an answerback from the on-site input/output device. A remote device operation confirmation device characterized by: (2) In the scope of claim 1, when the field input/output device receives an operation input from the other, after confirming the operation of the field device based on the one operation input, A remote device operation confirmation device, characterized in that it outputs a signal based on an operation input to the field device.