JPS6057794B2 - Display control method for remote monitoring and control equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a display control system for a remote monitoring and control device that controls the display of display lamps on a monitoring panel using a plurality of programmable processors.

Remote monitoring and control devices have been computerized for the purpose of downsizing and standardizing the hardware by converting its processing functions into software.

Furthermore, with the spread of microprocessors in recent years, they are being introduced. However, in a large-scale remote monitoring system, a single microprocessor does not necessarily provide sufficient processing power, and in this case, a multiple microprocessor configuration is used to increase the total processing power.
FIG. 1 shows a master station device of a remote monitoring and control device having such a complex microprocessor configuration.

Hereinafter, the functions of each part in this diagram will be briefly explained and the problems of the conventional system will be clarified. In FIG. 1, display data is transmitted via a transmission line 4 from a slave station (not shown).

Generally, a cyclic method is often used as a transmission method, and a transmission frame consisting of a synchronization word and a large number of display words is transmitted cyclically. The processing devices (processors) 11 to 1N detect synchronization words, check the display words for errors, and transfer correctly received display words to the processing devices 31 to 3N via the common bus 40.

The processing devices 31 to 3N store the received display data and output the display data to the display lamps of the monitoring panel 3 according to the contents thereof, and the data reception process and display control process will be described in detail later.

The above is a monitoring function, but on the other hand, a control function is performed as follows. When the operator operates the control console 2, this control signal is input to the processing device 21, decoded, and processed by the processing device 21.
The data is transferred via the common bus 40 to any one of the processing devices 11 to 1N, and then transmitted via the transmission line 4 to the corresponding slave station. Here, processing devices 11 to 1N, 21, 31 to
All 3Ns are composed of microprocessors,
Of these processing devices 31 to 3Nf) Even if there are N processing devices, the total number of display data transmitted from all slave stations is N
Display control is performed by sharing the display data of each divided portion.

Figure 2 shows the configuration of these processing devices that perform display control, and includes a read-only processing circuit that stores programs such as BPU1, which executes instructions according to the program via the internal bus BUS. Memory circuit ROM, readable/writable memory circuit RAM that stores data; timer TMR that generates interrupt signals with a constant cycle; data input/output circuit 1N/0 for the common bus 40; and data output for the signal line 6N. Circuits 0UT are interconnected.

The conventional processing method will be explained in detail below.

FIG. 3 shows the contents of the memory circuits ROM and RAM.

The memory circuit ROM stores programs such as a data reception processing program and display control program, as well as parameters that define the display format when display data is output to the monitoring panel, and the memory circuit RAM stores display data. Display memory to store, status change memo I to store status change information when there is a status change (hereinafter abbreviated as status change) in display data; mode to store display mode for flickering display data to the monitoring panel. There are counters etc. First, the data reception process will be explained.

FIG. 4 is a processing flow of the data reception processing program. This program is started every time display data is transferred from any of the processing devices 11 to 1N shown in FIG. First, in processing step 110, a bit whose state has changed is detected by checking the mismatch logic between the new data just received and the old data stored in the corresponding word position in the display memory. In the next processing step 120, the status change bit just detected is ORed with the content of the corresponding word position in the status change memory, and the newly detected status change bit is added. Thereafter, process step 130 stores the new data in the appropriate word location in display memory. Next, display control processing will be explained.

In connection with this process, a mode counter in the memory circuit RAM is used. For example, the contents of the mode counter are switched between a lighting mode and a lighting off mode every 250wLS, and the display mode is changed for 250m. When a display lamp is repeatedly turned on and off at a cycle of s to cause flickering, a binary counter is used as a mode counter. The contents of display control processing will be specifically explained below using the processing flow shown in FIG. 5 and the operation time chart shown in FIG. 6.

At time T1 in FIG. 6, when an interrupt signal is input to the processing circuit BPU from the timer )'R in FIG. 2, the processing in FIG. 5 is started.

First, in processing step 210, the contents of the display mode counter are incremented by one step.

As mentioned earlier, this counter is a binary counter, so it is incremented twice. In this example, time T1 is exactly at this time, and the display mode becomes the lighting mode pigeon.Subsequently, processing step 2
20 to 250, display control for one word is executed.

That is, in process step 220, the first display word is retrieved from the display memory, and in the following steps, this display data is processed into output data to the display lamp. Here, we will discuss the display method in remote monitoring and control equipment.The method is to flicker the display lamp corresponding to the controlled device only when the state of the device to be controlled changes from "off" to "on" (this is called A). There are various display methods, such as a method that flickers when the status of the device changes to either "input" or "off" (this method is called "method B"). The method of processing display data according to these display methods has already been disclosed in Japanese Patent Application No. 1983-9314gs.
-102155, and a brief explanation will be given here. Returning to FIG. 5, in the next processing step 230, the content of the mode counter is checked, and in this case, the content is "0", indicating the lighting mode, so branching is made to the left bus.

In the next processing step 241A, the process proceeds to the next step without making any changes to the position of method A among the display data taken out from the display memory. In the next processing step 241B, the display method table shown in FIG. Display date of position with change is 64199
Make it. Hereinafter, although not shown in FIG. 5, the display data of the position is processed according to the display method.

Thereafter, in the next processing step 250, the processed display data is output to the display lamp of the monitoring panel 3 via the signal line 6 in FIG. As a result, the display lamps in the positions where flickering is to be caused are lit, and the display lamps in positions where flickering is not to be caused continue to display the state of the display data. The processing of the first word is thus completed, and in the next processing step 260, the process returns to processing step 220 to perform the same processing on the second and subsequent words. When the word processing is completed, the series of processing ends. Time T2 after a certain period of time has elapsed
When an interrupt signal is input from timer TMR, the next process is started.

That is, in processing step 210, the content of the mode counter is incremented by one step, and the content changes from "゜0゛" to "゜"1゛.
The display mode is lighting mode M. to turn off mode M1. As a result, this time, the process branches to the right bus from processing step 230, and the display lamps are processed in order from the first word in the same way as last time, except that the display data corresponding to the lights-out mode is processed in processing step 242. Outputs data to and turns off the display lamps at the positions where flickering should occur. Further, at time 11T3 after a certain period of time has elapsed, the mode counter is incremented by one step and returns from ゜"1゛ to ゜"0゛.

In other words, it returned to the same state as at time T1. From then on, the same operations as described above are repeated. As a result, the display lamp at the position to be flickered is turned on at time T1, turned off at time T2, and thereafter turned on and off at the same cycle to cause flickering.

In order to stop this flicker, the operator operates a flicker stop switch provided on the control console 2.
The flicker stop command is transferred from the processing device 21 to the processing devices 31 to 3N via the common bus 40, and
This is done by clearing all the contents of the state change memory of each N, but a detailed explanation of this invention, which is not directly related to the present invention, will be omitted. The above is processing device 3
As explained in 1, if such processing devices are simply brought together, each processing device will perform display control at its own timing, so the flicker phase between display lamps controlled by different processing devices will also be random. It shifts.

Figure 6 shows that the phases of the timers of each processing device are different, and the internal state of the processing device (the contents of the mode counter) is also different between the processing devices, so the flicker phases of the display lamps become uneven. It shows how it is. ) However, while remote monitoring and control equipment has conventionally matched the flicker phases of indicator lamps to provide operators with good visibility, equipment equipped with multiple processors is no longer able to satisfy this requirement. Put it away.

An object of the present invention is to provide a display control method in a remote monitoring control device that makes it possible to align the flicker phase of the entire display lamp when multiple microprocessors share the display control of a portion of a large number of display lamps. The goal is to provide the following.

In order to achieve this objective, the present invention is configured such that each time the display mode of any one processing device changes, the display modes of the other processing devices are made to match the display mode, and then display control is started all at once. It is something. The present invention will be described in detail below. FIG. 7 shows the storage device RO in the embodiment of the present invention.
8 and 9 are display control processing flows, and FIG. 10 is an operation time chart.

The present invention will be explained below using these figures. Among the contents of the storage device ROM in FIG. 7, display control programs I,
is a program different from the display control program of the conventional example, and the destination table is a table newly added for the purpose of the present invention.Other than this, the reception processing program, display method table, etc. are the same as the conventional example.

The contents of the memory circuit RAM are the same as in the conventional example except that a phase counter is newly provided for the present invention. The purpose of this phase counter is to set the cycle of timer TMR to 1/1/1 of the display update cycle.
N and used to create a display update cycle within the processing device using an N-ary phase counter.

Its purpose will be revealed later. As an example, timer TM
The period of R is 507T1,S, and based on this, 5
A display update cycle of 2507n,s is created using a forward phase counter, and the mode counter is updated every 250Tn,s to alternately switch between the lighting mode and the lights-off mode, and the display lamp is turned on and off according to this display mode. A case where the display lamp flickers repeatedly will be described. 1st
Time Tl in Figure 0.

In this case, when an interrupt is input from the timer TMR to the processing circuit BPU, the processing shown in FIG. 8 is performed. First, processing step 10
Now, the contents of the phase counter are incremented by one step. Since this phase counter is a quinary counter as described above, it rotates once every time it is incremented five times and returns to ゜゜0゛. In this example, time T
IO is hitting at exactly this time. Therefore, in the next processing step 20, it is recognized that the display mode update period has come, and the process proceeds to the next processing step 210. This processing step 210 is the same as that of the conventional example shown in FIG.
Advances the contents of the display mode counter by one step. Since this display mode counter is also a binary counter as described in the conventional example, it rotates once every time it is incremented twice and returns to ゛0゛. , and the display mode changes to lighting mode M. After this, in the conventional example, the process immediately proceeds to processing step 220 to start display control, whereas in the present embodiment, processing steps 30 to 50 are performed before that. to change its own display mode to another processing device 3.
Contact 2-3N. That is, in processing step 30, destination 1 is taken out from the destination table in the storage circuit ROM and outputted onto the common bus via the input/output circuit IN/0UT.

Here, the addresses of the processing devices 31 to 3N excluding itself are set in the destination table in the storage circuit ROM of each processing device 31 to 3N, and for example, in the case of the processing device 31, the addresses of the processing devices 32 to 3N are set. is stored. Returning to FIG. 8, processing unit 32 is invoked by outputting the first destination onto common bus 40 in processing step 30 .

In the next process step 40, the process branches to process step 30 until transmission to all destinations is completed.

In processing step 30, destinations are taken out one by one from the destination table and output to the common bus 40, and when transmission of all destinations is completed, processing proceeds from processing step 40 to the next processing step 50. During this time, the other processing devices 32 to 3N are called one after another, each starts the process shown in FIG. wait for it to come. When the processing device 31 outputs the contents of the mode counter onto the common bus 40 in the next processing step 50,
The other processing devices 32 to 3N receive this all at once and set it in their respective mode counters in the next processing step 51.

Here, transferring the contents of the mode counter from the processing device 31 to the other processing devices 32 to 3N at the same time generally means transferring data from one transmitting station to a plurality of receiving stations. This technique is known, for example, from Japanese Patent Laid-Open No. 49-12713, and a detailed explanation of the invention will be omitted. As a result of the above, the display modes of the processing devices 31 to 3N are all unified to the lighting mode.

Thereafter, the processing device 31 and the processing devices 32 to 3N proceed to the next processing step 220 in FIGS. 8 and 9, respectively, and start display control.

The following series of processing steps 220 to 260 are the same as those in the conventional example shown in FIG. 5 and will not be described again, but as a result, the display lamps at the positions to be flickered are lit all at once at time TlO. Thereafter, each processing device increments the contents of the phase counter by one step each time an interrupt is received from timer TMR.

For example, at time Tll, the timer TM of the processing device 31
When an interrupt is received from R to the processing circuit BPU, the process shown in FIG. 8 is started, but as a result of incrementing the phase counter by one step in step 10, the contents only change from 0 to 1.
Since it has not yet completed one rotation and returned to 660°, in the next process step 20, the process branches to the right bus and ends the process. Time A2.

Then, when the contents of the phase counter of the processing device 32 rotate once and return to ゛0゛, and the mode counter is incremented and changes to the light-off mode M1, the contents of the phase counter of the processing device 32 are transferred to the other processing devices 31, 33 to 3N. After the light-off mode M1 is communicated to the computer, processing steps 220 to 260 are executed all at once.
However, at this time, since the light is off mode, processing step 230 is performed.
From ", the process branches to step 242A, and the display lamps at the positions to be flickered are turned off all at once. In the same way, every time the display mode changes in any of the processing devices, the display lamps at the positions to be flickered are turned off. The light turns on and off repeatedly, causing it to flicker.

This allows the flicker phase of the entire display lamp to be aligned. On the other hand, in the present invention, since the contents of the phase counter and mode counter are mutually corrected between a plurality of processing devices, it is taken into consideration that the flicker period varies depending on the timer phase shift between each processing device. I have to keep it.

From this point of view, focusing on time TlO in FIG. 10, the phase counters of the processing units 32 to 3N are forcibly reset to 0, but this means that one extra interrupt from the timer is generated at that point. This is equivalent to the following, and the phase is advanced by one clock. On the other hand, only the position counter of the processing device 31 does not advance in phase by one clock, so at this point it is the most delayed phase compared to the others, and in contrast, the phase counter of the processing device 32 is the most advanced. It becomes a phase. Therefore, before the processing device 31 reaches the next display update period, the processing device 32 reaches the display update period first.

Therefore, time Tl. In this case, the display update period becomes shorter by the amount that the phase counter of the processing device 32 advances in phase with respect to the phase counter of the processing device 31. However, since this phase difference is within one count of the phase counter, the display update cycle does not change any further.

In the present example, it is 507 nS. However, 1. For the sake of simplicity, the timer cycle is set to 50 WL, S.
In reality, by shortening the timer cycle, for example, by setting the timer cycle to 10Tns and making the phase counter a double counter, it is possible for the operator to keep the fluctuation in the display update cycle to 10TrLs or less. It can be pressed to the extent that it is not visually noticeable. As described above, according to the present invention, the flicker phases of the display lamps can be aligned, and the operator can obtain good visibility.

[Brief explanation of the drawing]

Fig. 1 is a block diagram of the master station of the remote monitoring and control device, Fig. 2 is a block diagram of the processing device, Fig. 3 is a diagram of the data structure inside the storage circuit of the conventional example, and Figs. 4 and 5 are the processing of the conventional example. Flowcharts, FIG. 6 is an operation time chart of the conventional example, FIG. 7 is a data configuration diagram inside the memory circuit of the present invention, FIGS. 8 and 9 are processing flow diagrams of the present invention, and FIG. It is an operation time chart figure. 1... Control panel, 2... Control console, 3...
...Monitoring board, 4...Transmission line, RAM...
・・・Radidam access memory, ROM・・・・・・
Read-only memory.

Claims (1)

[Claims] 1. In a remote monitoring and control device that performs display control, including flicker, on the display lamps of each part of the monitoring panel with each programmable processor of a master station device having a plurality of programmable processors, each of which operates at its own timing. , each time the display mode of any one programmable processor changes, the display modes of all the programmable processors for display control are made to match the display mode after the transition, and then the display control is executed all at once. A display control method for a remote monitoring and control device that synchronizes the flicker phase between display lamps controlled by different programmable processors.