JPH0244439B2 - - Google Patents

Description

[Detailed Description of the Invention] (a) Technical Field of the Invention The present invention provides an information system that transmits state change data of industrial equipment, etc. through transmission routes of two different information transmission means, and collects state change data information. Regarding collection route switching method.

(b) Background of the technology In recent years, industrial equipment used in various industrial fields constantly monitors the operating status of the equipment from various sensors, and collects data on changes in the equipment's status that change from moment to moment. 2. Description of the Related Art System monitoring and control systems have been widely put into practical use, which have a monitoring device that monitors whether main equipment and auxiliary equipment are operating smoothly, and record changes in their status on a print recording device. In particular, among this type of industrial equipment,
When equipment is operated under specific environmental conditions, monitoring equipment cannot be installed near the main equipment.
Furthermore, even in the case of a system in which multiple pieces of equipment are centrally monitored and controlled, the equipment and the monitoring equipment are connected through a transmission route, and status change data is transmitted. Furthermore, in the case of a system where there is a risk of serious failure due to human hazards or equipment failures, this transmission route should be duplicated, and a different information transmission method should be used to avoid failure to monitor due to failure of the information transmission method. Status change data of the same equipment is transmitted through two transmission routes, and an information collection method is adopted that increases the reliability of the transmission route.

(c) Prior Art and Problems A conventional two-system transmission route information collection method for this type of equipment monitoring device will be explained. FIG. 1 shows a block diagram of an equipment monitoring device using a conventional dual transmission route information collection system. 1 indicates industrial equipment, the same state change data is transmitted from the industrial equipment 1 through two working transmission routes 2a and a backup transmission route 2b, and the line switching unit 3 is connected to the working transmission route 2a and the backup transmission route 2b. The transmission route 2a and the backup transmission route 2b are input. Of the two input transmission routes, the switching mechanism of the line switching unit 3 receives state change data from the working transmission route 2a.
The received state change data is temporarily stored in the input data buffer 4 and transmitted to the control processing device (not shown) that performs monitoring and control. to print and record. If the current transmission route 2a fails due to some kind of failure and the state change data cannot be transmitted, switching control is performed to avoid a situation where monitoring becomes impossible due to the failure of the current transmission route 2a. In section 6, the working transmission route 2a
detects a failure and sends a switching signal to the line switching unit 3 to switch from the working transmission route 2a to the backup transmission route 2.
Switch to b. This is the working/standby switching method.

However, this working/backup switching system can only be used when the two systems of information transmission means are the same, and can only be used in systems where the two systems of information transmission means are different, such as a continuous cyclic transmission system (telemeter) and a boring system. In this case, since there is a difference in the transmission timing of the state change data, the state change data may be lost or received twice depending on the switching timing between active and standby, so it cannot be used. Furthermore, if the two systems of information transmission means each transmit a plurality of pieces of information, and some of them transmit different types of information, it is difficult to share the input data buffer. Therefore, when transmitting state change data of industrial equipment using different information transmitting means, two separate receiving apparatuses as shown in FIG. 2 are required. Identical objects are designated by the same reference numerals throughout the figures. In Figure 2, 7a and 7b
is a transmission route, 8a and 8b are input processing units, 9a and 9b are input data buffers, 10-a and 10-b
indicates a printing and recording device. The transmission route 7a and the transmission route 7b are transmission lines using different information transmission means. Since these two systems of receiving devices have the same configuration, only one system of receiving devices will be briefly described. However, as described above, some of the transmitted information is different, and the information to be duplicated is the commonly transmitted information or a part thereof. State change data of the industrial equipment 1 is input via the transmission route 7a, the input state change data is processed by the input processing section 8a, and temporarily stored in the input data buffer 9a. The temporarily stored state change data is recorded by the printing and recording device 10-a,
The operating status of the industrial equipment 1 will be monitored.

Having two systems of such receiving devices increases the cost of equipment monitoring equipment, and sacrifices the ability to record instantaneous status change data in real time.
There is a limit to the amount of savings that can be made by using a single printing and recording device, and conventional equipment monitoring equipment that collects status change data using two different information transmission systems has the disadvantage that information cannot be collected consistently. had.

(d) Purpose of the Invention The purpose of the present invention is to solve the drawback that the conventional method cannot collect information consistently.

(e) Structure of the Invention The above object is to provide two separate memories for receiving and storing state change data of equipment through two transmission routes using different information transmission means, and to provide a system for storing state change data stored in the memories. The input data buffers for two systems each store the state change data only when the data is different from the content already stored in the input data buffers, the monitoring detection circuit detects an abnormality in the transmission route for each of the two transmission routes, and the state change. and an input flag memory for setting a data input enable or input prohibition flag, and an input flag memory for setting a data input enable flag among the state change data received by the two route transmission routes and stored in the memory. The state change data of one system is stored in the input data buffer of the same system, and the state change data stored in the input data buffer of the one system due to abnormality detection by the monitoring detection circuit is stored in the input data buffer of the other system. This is achieved by an information collection route switching method characterized by transferring the information to the input data buffer and switching the flag in the input flag memory.

In other words, the state change data of industrial equipment, etc. transmitted by different information transmission means are individually detected by two systems of monitoring and detection circuits, and the state change data of one transmission system with the input enable flag set is simultaneously detected. The state change data of the other transmission system, which is stored in the input data buffer of the system, and the input prohibition flag is set, is not input to the input data buffer of the same system, and due to changes in the detection signal of the monitoring detection circuit, By transferring the state change data from one input data buffer where it was stored to the other input data buffer, switching the input flag memory from input prohibited to input enabled, and configuring to store the next state change data, the same Even if the status of industrial equipment, etc. is collected from two transmission routes using different information transmission means, the status change record is recorded consistently as if the information was collected through one route. This provides a collection route switching method.

(f) Embodiment of the Invention An embodiment of the present invention will be described below. Third
The figure shows a block diagram of an equipment monitoring device for collecting information from two transmission routes using different information transmission means according to the present invention. 11 is a microcomputer;
12 is a control program memory, 13-a is a first input processing section, 13-b is a second input processing section, 14
-a is the first monitoring detection circuit, 14-b is the second monitoring detection circuit, 15-a is the first memory, 15-b
16 is a data bus, 17-a is a first input data buffer, and 17-b is a second input data buffer.

First, an outline of the operation of the embodiment will be explained with reference to FIG.

In this explanation, operations regarding data to be duplicated among various data transmitted through the two-system transmission route will be explained.

When all the transmission routes are normal, the state change data from the industrial equipment 1 is transmitted through the two transmission routes 7a and 7b.

Since these transmission routes are different information transmission means as described above, the information is sent at different times.

Now, if the current transmission route 7a is the transmission route 7a, the transmitted state change data is stored in the memory 1 of the input processing section 13a.
It is temporarily stored in 5a.

Next, the contents of this memory 15a (current data) and the contents of input data buffer 17a (past data)
are compared, and if there is a difference between the two, it is determined that a state change has occurred, and the contents of the memory 15a are outputted to the printing/recording device 5 via the data bus 16 and stored in the input data buffer 17a.

If there is no difference between the two, there is no change in state, so neither printout nor storage into the input data buffer 17a is performed.

Thereafter, by repeating such operations, print output can be obtained as time passes.

On the other hand, the state change data transmitted via the backup transmission route 7b is temporarily stored in the memory 15b of the input processing section 13b, but due to the input prohibition flag recorded in a part of the memory 15b, the input data buffer Since nothing is stored in the memory 17b, even if the contents of the memory 15b (current data) are compared with the contents of the input data buffer 17b (past data), it is not determined that there has been a change in the state. There is no output to the input data buffer 17b, and the contents of the memory 15b are not stored in the input data buffer 17b.

Therefore, the state change data sent via transmission route 7b is only recorded in memory 15b.

This state is repeated thereafter.

Next, when a fault occurs in the current transmission route 7a, the monitoring detection circuit 14a detects the fault and transfers the contents of the current input data buffer 17a to the backup input data buffer 17b.

As a result, the contents of the memory 15b and the input data buffer 17b are compared, and then the input prohibition flag is switched.

As a result, even if the contents of the memory 15b received on the transmission route 7b and the information received on the transmission route 17a differ in reception timing, the contents of the memory 15b and the transferred contents of the input data buffer 17b are the same. The data is neither printed out nor stored in the input data buffer 17b. Also, if there is a difference between the two, print output and input data buffer 1
7b.

Through the above operations, consistent information is output from the printing and recording device 5.

The microcomputer 11 (hereinafter abbreviated as μPull) executes instructions for the entire equipment monitoring device. The control program memory 12 stores an input prohibition flag control program, an input data buffer data transfer control program, and a check control program for information that cannot be collected. 1st
The input processing unit 13-a interfaces the state change data of the industrial equipment 1 inputted via the transmission route 7a, and detects the inputted state change data and detects abnormalities in the transmission route. The second input processing unit 13-b includes a monitoring detection circuit 14-a and a first memory 15-a for temporarily storing state change data, and the second input processing unit 13-b has an industrial data input via the transmission route 7b. A second monitoring detection circuit 1 that detects state change data of the equipment 1 and detects abnormalities in the transmission route.
4-b, and a second memory 15-b for temporarily storing state change data. The data bus 16 is a common path for transferring various information data. The first input data buffer 17-a is a buffer memory that temporarily stores state change data input to the first input processing section 13-a, and the second input data buffer 17-b is a buffer memory that temporarily stores state change data input to the first input processing section 13-a. 13-b
This is a buffer memory that temporarily stores state change data input to the .

The input prohibition flag control program of the control program memory 12 sets data input prohibition flags corresponding to the words of each data buffer in the first memory 15-a and the second memory 15-b. When the data input prohibition flag is "1", no input processing is performed to the first input data buffer 17-a or the second input data buffer 17-b, and only when the data input prohibition flag is "0", the first input Data buffer 17-a or second input data buffer 17-b
Input processing is performed to update state change data. Only one of the data input prohibition flags is set to "1", and the other one is set to "0".

The data transfer control program of the control program memory 12 is configured such that, for example, the data input prohibition flag of the first memory 15-a on the transmission route 7a side is "0".
Then, the state change data is input to the first input data buffer 17-a, and the state change data is input to the second memory 15-a.
-b's data input prohibition flag is "1" and input processing is prohibited, if the transmission route 7a fails due to some kind of failure, the first input data buffer 17-a This is a control program for transferring stored state change data to the second input data buffer 17-b. When the transmission route 7a fails and state change data is no longer input, the first monitoring detection circuit 14-
Due to the change in the detection signal of a, the data input prohibition flags for both routes are set to "1" after a certain period of time, and
The state change data of the first input data buffer 17-a, which had been input-processed, is transferred to the second input data buffer 17-a, which had not been input-processed.
Transfer to b. Next, the control program memory 12
The data input prohibition flag of the second memory 15-b is set to "0" by the input prohibition flag control program.
Then, the data input prohibition flag of the first memory 15-a is switched to "1".

The control program based on the data transfer control program and the input prohibition flag control program sets the data input prohibition flag of the first memory 15-a to F1 and the data input prohibition flag of the second memory 15-b.
F2 and the first input data buffer 17-a.
BuF1, second input data buffer 17-b
BuF2, input prohibition flag is F1 = 0, F2 = 1
The switching procedure to change from F1=1, F2=0 is as follows: (1) F1=1, F2=1 (2) Transfer the contents of BuF1 to BuF2 (3) F1=1, F2=0 The information collection rate is switched.

The check control program for the information collection failure information in the control program memory 12 is configured to: That is, a failure in the transmission route 7a or the transmission route 7b or a failure in the first input processing section 13-a or the second input processing section 13-b is checked based on the detection signal, and the first memory of the failed system is 15-
This is a control program that causes state change data information to be temporarily stored in the second memory 15-a or the second memory 15-b.

FIG. 4 shows a matrix diagram for determining the control program in the control program memory 12. The first monitoring detection circuit 14-a is A, the second monitoring detection circuit 1
4-b is B, the input prohibition flag of the first memory 15-a is F1, the input prohibition flag of the second memory 15-b is F2, "0" is input processing allowed, "1"
If input processing is not possible, then in the first stage a, A=0, B=0, F1=0, F2=1, and it is determined that the information change data should be stored in the first input data buffer 17-a. . Similarly, input data buffers to be stored are determined according to b to c of the second to third stages. In the case of the fourth stage d, the previous value is held.

In FIG. 3, the first input processing section 13-a and the second input processing section 13-b receive the equipment state change data information and, under the control of the input prohibition flag control program of the control program memory 12, When the input prohibition flag is “0”, the received state change data and the first input data buffer 17-
A or the second input data buffer 17-b and state change data is detected, and the data is stored and updated in the input data buffer of the own route. When the input prohibition flag is "1", no processing is performed. When the detection signal of the first monitoring detection circuit 14-a or the second monitoring detection circuit 14-b changes, the data transfer control program of the control program memory 12 controls the first input data buffer 17-a. The stored state change data is transferred between the second input data buffer 17-b, and the input prohibition flag of the first memory 15-a or the first memory 15-a is set under the control of the input prohibition flag control program. The state change data is stored in the input data buffer of the system whose input prohibition flag is "0".

By recording the state change for each input, it will actually be performed only on the route where the data input prohibition flag is "0", and when the data input prohibition flag is switched, the transfer between input data buffers will be performed. Therefore, the process of printing and recording in the printing and recording device 5 is performed using the transmission route 7a, which is two transmission routes with different information collection systems.
Since it is sufficient to print and record each time a state change is detected in the input processing section using a control program unique to each route without being aware of the transmission route 7b or transmission route 7b, consistency can be maintained in the recorded contents.

(g) Effects of the Invention As explained above, the state change data of industrial equipment, etc. transmitted by different information transmission means is individually detected by two systems of monitoring and detection circuits, and the input permission flag is set. The state change data of one transmission system is stored in the input data buffer of the same system,
The state change data of the other transmission system for which the input prohibition flag is set prohibits input processing of the input data buffer of the same system, and due to the change in the detection signal of the monitoring detection circuit, the state change data is stored. By using the circuit system of the present invention configured to transfer data from one input data buffer to the other input data buffer and store the next state change data, the state of the same industrial equipment etc. can be transmitted by different information transmission means. Even if information is collected from two transmission routes, the state change record can be recorded consistently as if the information had been collected using one route.

[Brief explanation of the drawing]

1 and 2 are circuit configuration block diagrams of a conventional facility monitoring device, FIG. 3 is a circuit configuration block diagram of a facility monitoring device of the present invention, and FIG. 4 is a determination matrix diagram of a control program according to the present invention. shows. In the drawings, 1 is industrial equipment, 5 is a printing and recording device, 11 is a microcomputer, 12 is a control program memory, 13-a is a first input processing section, 13-b is a second input processing section, 14- a is the first monitoring detection circuit, 14-b is the second monitoring detection circuit, 15-a is the first memory, 15-b is the second memory, 16 is the data bus, 17-a is the first Input data buffers 17-b each indicate a second input data buffer.

Claims (1)

[Claims] 1. Two separate memories that receive and store the status change data of the equipment through two transmission routes using different information transmission means, and the status change data stored in the memories are already stored in the input data buffer. two separate input data buffers that store the state change data only when they are different;
A monitoring detection circuit for detecting an abnormality in the transmission route for each of the two transmission routes, and an input flag memory for each of the two transmission routes for setting a flag for allowing or prohibiting input of the state change data, and for each of the two transmission routes. Among the state change data received by and stored in the memory, the state change data of one system for which the input enable flag has been set is stored in the input data buffer of the same system, and the state change data of one system is stored in the input data buffer of the same system, and the above state change data is An information collection route switching method characterized in that the state change data stored in the input data buffer of one system is transferred to the input data buffer of the other system, and a flag in the input flag memory is switched.