JP2956925B2 - Plant control device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a plant control apparatus installed in various plants such as steel.

[0002]

2. Description of the Related Art FIG. 12 is a block diagram showing a conventional plant control device. In FIG. 12, 1 is a programmable controller (in the figure, a symbol CPU is attached), 2
Is a cyclic memory held by the programmable controller 1, 3 is an input / output card interface held by the programmable controller 1, 4 is a bus-type transmission path, 5 is data connected to a plurality of programmable controllers 1 via the bus-type transmission path 4. A transfer device, 6 is a cyclic memory held by the data transfer device 5, 7 is an error monitoring function unit held by the data transfer device 5, 8 is a data transfer function unit held by the data transfer device 5, and 9 is a data transfer device 5. Is an input / output card interface, 10 is a special input / output card, and 11 is a digital / analog input / output card for inputting / outputting data such as ON / OFF of a sequence contact. Each of the cyclic memories 2 and 6 has an input area and an output area assigned to each of the programmable controller 1 and the data transfer device 5, and data output from the programmable controller 1 is transmitted to another programmable controller 1 and the data transfer device 5. The data output from the data transfer device 5 is reflected on the click memory 6, and the data output from the data transfer device 5 is reflected on the cyclic memory 2 of the programmable controller 1. The special input / output card includes, for example, an interrupt input card for performing an interrupt input when a value changes, a normal mode counter card for simply measuring a movement distance, and a measurement value for measuring the movement distance and comparing the measured movement distance with a comparison value. And a drive interface card for controlling and monitoring the motor drive control device.

Next, the operation of the above-mentioned conventional plant control device will be described. When outputting data from the programmable controller 1 to the digital / analog input / output card 11, the programmable controller 1 transmits the data to the data transfer device 5 via the cyclic memory 2 and the bus-type transmission line 4.
The data transfer function unit 8 outputs the data from the cyclic memory 6 to the corresponding digital / analog input / output card 11 via the input / output card interface 9. vice versa,
When data is input from the digital / analog input / output card 11 to the programmable controller 1, the data transfer function 8 transmits the data of the digital / analog input / output card 11 to the cyclic memory 6 and the bus type via the input / output card interface 9. The signal is output to the cyclic memory 2 of the programmable controller 1 via the path 4. The error monitoring function unit 7 monitors the data transfer device 5 for abnormalities.

On the other hand, the special input / output card 10 is directly connected to the programmable controller 1 via the input / output interface 3, and the data transfer between the special input / output card 10 and the programmable controller 1 is directly accessed.

[0005]

In the above-mentioned conventional plant control device, the digital / analog input / output card 11 for performing simple input / output as described above is connected to the data transfer device 5 to control the special input / output card. Since the associated card is connected to the programmable controller 1, the input / output interface of the special input / output card 11 such as an interrupt input card, a counter card, and a drive interface card with complicated control is required for a plurality of programmable controllers 1. However, there has been a problem that the programmable controller 1 and the special input / output card 11 cannot be used effectively.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and an object of the present invention is to reduce costs by effectively utilizing a programmable controller and a special input / output card.

[0007]

[0008]

Means for Solving the Problems The plant control system according to the inventions described in claim 1, a plurality of controlling the plant
Programmable controllers and each of these programmers
Interface between the cable controller and the I / O card
Connected to a data transfer device that performs
In the plant control device, the data transfer device
When the value of the control target changes, an interrupt
An interrupt input card support function unit for exchanging data with the input card is provided .

[0009] The plant control system according to the inventions described in claim 2, a plurality of programmable co controlling the plant
Controllers and each of these programmable controllers
Data transfer to interface with the I / O card
Plant control device connected to the device via a bus-type transmission line
In the above, the data transfer device is provided with
With a normal mode counter card to simply measure release
A normal mode counter card support function unit for exchanging data is provided .

[0010] The plant control system according to the inventions described in claim 3, a plurality of programmable co controlling the plant
Controllers and each of these programmable controllers
Data transfer to interface with the I / O card
Plant control device connected to the device via a bus-type transmission line
In the above, the data transfer device is provided with
The separation is measured, and the measured travel distance is used as a comparison value.
Length measuring mode counter card for comparing and determining the length
Characterized by comprising a measurement mode counter card support function unit for performing data exchange with over de.

According to a fourth aspect of the present invention, there is provided a plant control apparatus comprising: a plurality of programmable controllers for controlling a plant;
Controllers and each of these programmable controllers
Data transfer to interface with the I / O card
Plant control device connected to the device via a bus-type transmission line
In the above, the drive control device is controlled by the data transfer device.
Data with a drive interface card for monitoring
A drive interface card support function unit for exchanging data .

[0012]

[0013]

According to the first aspect of the present invention, the interrupt input card is connected to the data transfer device so that the interrupt input card support function unit of the data transfer device exchanges data between the programmable controller and the interrupt input card. I do. As a result, for example, interrupt input / output due to a change in the value of the control target unit is collected in the data transfer device.

In the plant control device according to the second aspect of the present invention, the normal mode counter card support function unit of the data transfer device is connected between the programmable controller and the normal mode counter card by connecting the normal mode counter card to the data transfer device. Exchange data. As a result, for example, the normal mode input / output of the counter card that simply measures the moving distance of the control target unit is collected in the data transfer device.

In the plant control device according to a third aspect of the present invention, the length measurement mode counter card support function unit of the data transfer device is connected to the programmable controller and the length measurement mode counter card by connecting the length measurement mode counter card to the data transfer device. Exchange data between As a result, for example, the length measurement mode input / output of the counter card that simply measures the moving distance of the control target unit is integrated in the data transfer device.

According to a fourth aspect of the present invention, in the plant control device, the drive interface card support function unit of the data transfer device exchanges data between the programmable controller and the drive interface card by connecting the drive interface card to the data transfer device. I do. As a result, for example, the input / output of the drive interface card that controls and monitors the motor drive control device as the control target unit is collected in the data transfer device.

[0017]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments of the present invention will be described with reference to FIGS.
And the same parts as those in the conventional example are denoted by the same reference numerals and described.
I do. Example1.  FIG. 1 is a configuration diagram showing a plant control device as a first embodiment.
It is. In FIG. 1, the programmable controller 1 is
It has a cyclic memory 2 and the data transfer device 5
Click memory 6, error monitoring function unit 7, and data transfer device
Nobu 8 and I / O card interface 9A and special I / O
A card support function unit 12;
The controller 1 is connected to one data transfer device 5 by a bus-type transmission path.
4, the data transfer device 5 is connected to be sharable,
The data transfer device 5 has a special input / output card 10 and a
Digital / analog I / O card 11
Special input / output card connected via interface 9A
The support function unit 12 is cyclic with the special input / output card 10
Data is exchanged with the memory 6.

Therefore, according to the first embodiment, when data is output from the programmable controller 1 to the digital / analog input / output card 11, the programmable controller 1 transmits the data via the cyclic memory 2 and the bus-type transmission line 4. Then, the data is transferred to the input area of the cyclic memory 6 and the data transfer function unit 8 transfers the data from the cyclic memory 6 to the input / output card interface 9A.
And outputs it to the corresponding digital / analog input / output card 11. When data is output from the programmable controller 1 to the special input / output card 10, the programmable controller 1 transfers the data to the cyclic memory 6 via the cyclic memory 2 and the bus-type transmission line 4, and the data is specially transmitted. The input / output card support function unit 12 transmits the special input / output card 1 from the output area of the cyclic memory 6 via the input / output card interface 9A.
Output to 0. On the other hand, when data is input from the digital / analog input / output card 11 to the programmable controller 1, the data transfer function 8 transmits the data of the digital / analog input / output card 11 to the input / output card interface 9A, the cyclic memory 6, and the bus-type transmission path. 4 and output to the cyclic memory 2 of the programmable controller 1. When data is input from the special input / output card 10 to the programmable controller 1, the special input / output card support function unit 12 transmits the data of the special input / output card 10 to the input / output card interface 9A, the cyclic memory 6, and the bus-type transmission path. 4 to the input area of the cyclic memory 2. During the data transfer, the error monitoring function unit 7 monitors the data transfer device 5 for abnormalities.

Example2.  FIG. 2 illustrates a configuration of a plant control device according to a second embodiment.
FIG. 3 and FIG. 3 show data transfer of the interrupt input card according to the second embodiment.
FIG. 4 is a flow chart showing a processing flow of the second embodiment.
It is a chart.

In the second embodiment, as shown in FIG. 2, an interrupt input card support function unit 12-1 is configured as the special input / output card support function unit of the first embodiment, and the special input / output card of the first embodiment is used as the special input / output card of the first embodiment. The feature is that the interrupt input card 10-1 is used. That is, in FIG. 2, a plurality of programmable controllers 1 each having a cyclic memory 2 include a cyclic memory 6, an error monitoring function unit 7, a data transfer function unit 8, an input / output interface 9A, and an interrupt input card support function unit 12-1. The data transfer device 5 is connected so as to be sharable to one data transfer device 5 using a bus-type transmission line 4. The data transfer device 5 includes a digital / analog input / output card 11 and an interrupt input card. 10-1 is the input / output interface 9
A is connected through A. This interrupt input card 1
Reference numeral 0-1 denotes a special input / output card for inputting an interrupt when a value of a control target unit (not shown) changes. The interrupt input / output card support function unit 12-1 executes a process based on the flowchart of FIG.

Next, the operation of the second embodiment will be described with reference to FIGS. Interrupt input card 10-
The interrupt input card support function unit 12-1 of the data transfer device 5 reads the interrupt card number (interrupt card No.) of the interrupt input card 10-1 via the input / output card interface 9A in response to the interrupt from step 1 (step 1). 101, 102). At this time, if an error occurs, error processing is performed by the error monitoring function unit 7 (YES in step 103, step 107). If no error occurs, the interrupt input card support function unit 12
-1 outputs the card number as an address to the cyclic memory 6 and reads the interrupt vector number (interrupt vector No.) of the interrupt input card 10-1 (step 104). If an error occurs again, error processing is performed by the error monitoring function unit 7 (step 10).
5 is YES, step 107). If no error occurs, a pulse signal is output to the corresponding interrupt signal area on the cyclic memory 6 (step 106). Here, the interrupt card number is for identifying which of the plurality of interrupt input cards 10-1 connected to the data transfer device 5 is the interrupt input card,
The interrupt vector number is used to identify which of a plurality of interrupt factors is present in the identified interrupt input card 10-1.

Example3.  FIG. 5 shows a configuration of a plant control device as a third embodiment.
FIG. 6 and FIG. 6 are explanatory diagrams of the operation of the third embodiment.

In the third embodiment, as shown in FIG. 5, a normal mode counter card support function unit 12-2 is constructed as the special input / output card support function unit of the first embodiment, and the special input / output card of the first embodiment is used. Is characterized in that the normal mode counter card 10-2 is used. That is, in FIG. 5, a plurality of programmable controllers 1 each having a cyclic memory 2 include a cyclic memory 6, an error monitoring function unit 7, a data transfer function unit 8, an input / output interface 9A, and a normal mode counter card card support function unit 12. The data transfer device 5 is connected to a single data transfer device 5 having a -2 using a bus-type transmission path 4 so as to be sharable. Mode counter card 1
0-2 are connected via the input / output interface 9A. The normal mode counter card 10-2 has no comparison value and is a special input / output card for simply measuring the moving distance of the control target unit (not shown). Perform actions based on

Next, the operation of the third embodiment will be described with reference to FIG. First, the normal mode counter card 22
When the data transfer device 5 is activated, the normal mode counter card support function unit 12-2 will be described.
Rises, and the normal mode counter card support function unit 12-2 sets (sets) the activation flag of the normal mode counter card 10-2 in the normal mode counter card 10-2. Next, the normal mode counter card 10-2
A description will be given of a transfer process in the case where an external input is calculated. The normal mode counter card support function unit 12-2
Periodically transfers the count value of the normal mode counter card 10-2 to the input area of the cyclic memory 6.

Examples4.  FIG. 7 shows a configuration of a plant control device as a fourth embodiment.
FIG. 8 and FIG. 8 are explanatory diagrams of the operation of the fourth embodiment.

In the fourth embodiment, as shown in FIG. 7, a length measurement mode counter card support function unit 12-3 is configured as the special input / output card support function unit of the first embodiment, and the special input / output of the first embodiment is used. The feature is that a length measurement mode counter card 10-3 is used as a card. That is, in FIG. 7, a plurality of programmable controllers 1 each having a cyclic memory 2 include a cyclic memory 6, an error monitoring function unit 7, a data transfer function unit 8, an input / output interface 9A, and a length measurement mode counter card card support function unit. The data transfer apparatus 5 is connected to one data transfer apparatus 5 having a bus 12 through a bus type transmission path 4 so as to be sharable. Measurement mode counter card 1
0-3 are connected via the input / output interface 9A. The length measurement mode counter card 10-3 has a comparison value, and measures a movement distance of a control target portion (not shown), and compares the measured movement distance with the comparison value to determine a length. The length measurement mode counter card support function unit 12-3 executes the operation based on FIG.

Next, the operation of the fourth embodiment will be described with reference to FIG. First, the length measurement mode counter card 10
-3 startup processing will be described.
Measurement mode counter card support function unit 12
-3 rises, the length measurement mode counter card support function unit 12-3 reads the comparison value of the cyclic memory 6, and when the comparison value becomes a value other than 0, the comparison value is read from the cyclic memory 6 to the length measurement. Mode counter card 1
0-3, and the activation flag of the length measurement mode counter card 10-3 is transferred to the length measurement mode counter card 10-3.
Set to -3. Next, the length measurement mode counter card 10
The transfer process when -3 counts an externally input value such as a moving distance will be described. The comparison value of the cyclic memory 6 is periodically read even after the start flag is set, and the comparison value is other than 0. In the case of, the comparison value is stored in the cyclic memory 6 in the length measurement mode counter card 10-
Transfer to 3. The length measurement mode counter card support function unit 12-3 periodically outputs the comparison value and the count value irrespective of the value of the comparison value.
To the cyclic memory 6. Here, the comparison value is compared with the count value in the length measurement mode counter card 10-3, and when the count value exceeds the comparison value, the length measurement mode counter card support function unit 12-3 can interrupt.

Example5.  FIG. 9 shows a configuration of a plant control device as a fifth embodiment.
FIG. 10 and FIG. 10 illustrate the operation of the fifth embodiment, and FIG.
It is a figure which shows a comparative example.

In the fifth embodiment, as shown in FIG. 9, a drive interface card support function unit 12-4 is configured as the special input / output card support function unit of the first embodiment, and the special input / output card of the first embodiment is used. The feature is that the drive interface card 10-4 is used. That is,
9, a plurality of programmable controllers 1 having a cyclic memory 2 have a cyclic memory 6, an error monitoring function unit 7, a data transfer function unit 8, an input / output interface 9A, and a drive interface card support function unit 12-4. In one data transfer device 5,
The data transfer device 5 is connected in a sharable manner by using a bus-type transmission line 4.
The analog input / output card 11 and the drive interface card 10-4 are connected via the input / output interface 9A. This drive interface card 1
Reference numeral 0-4 denotes a special input / output card for controlling and monitoring a motor drive control device as a control target unit (not shown), and a drive interface card support function unit 12-4.
Performs the operation based on FIG.

Next, the operation of the fifth embodiment will be described with reference to FIG. With the activation of the data transfer device 5, the drive interface card support function unit 12-4 starts up, and the drive interface card support function unit 1
2-4 activates the initials of the drive interface card 24. If this initial is successfully activated,
The drive interface card support function unit 12-4 sets data indicating the start completion in the status area on the cyclic memory 6. The programmable controller 1 periodically reads this information from the cyclic memory 6 and, upon recognizing the completion of the start, starts the data output processing of the reference area on the cyclic memory 6 and the data input processing from the feedback area. The drive interface card support function unit 12-4 periodically transfers the data in the reference area on the cyclic memory 6 to the reference area of the drive interface card 10-4 after the activation of the drive interface card 10-4. The drive interface card support function unit 12-4 is provided with the drive interface card 10
-4 is transferred to the feedback area on the cyclic memory 6. further,
The drive interface card support function unit 12-4 includes:
The status of the drive interface card 10-4 is read, the local station controlled by the drive interface card 10-4 is monitored, and the monitoring data is transferred to the status area on the cyclic memory 6. In this manner, the drive interface card support function unit 12-4 controls the cyclic memory 6
Through this, data can be exchanged between the programmable controller 1 and the drive interface card.

In short, according to the fifth embodiment, the memory capacity of the drive interface card can be effectively utilized as shown in FIG. That is, one drive interface card usually has a memory capacity that allows control and monitoring of a maximum of 127 motor drive control devices. As in the comparative example shown in FIG. 11A, even when each of the plurality of programmable controllers 1 having the input / output card interface 3 controls and monitors five motor drive control devices (not shown), each of the programmable controllers 1 Interface card 10
-4 must be connected, the memory capacity of each drive interface card 10-4 is so large that it is not being used effectively, and the programmable controller 1 has two drive interface cards 10-4. Is required. On the other hand, in the case of the fifth embodiment, as shown in FIG. 11B, one data transfer device 5 shared by a plurality of programmable controllers 1 has an input / output card interface 9A, and One drive interface card 1 in device 5
Since the drive interface card 0-4 is connected, the single drive interface card 10-4 holds data for the total number of, for example, 10 motor drive control devices (not shown) that are monitored and controlled by the plurality of programmable controllers 1. The free space of the memory capacity of the drive interface card 10-4 is reduced as compared with the comparative example, so that the memory capacity of one drive interface card 10-4 can be effectively utilized, and the drive interface card 10-4 requires only one drive interface card. Enough is enough.

[0032]

[0033]

As described above , according to the first invention, since the data transfer device has the interrupt input card support function unit, even if a plurality of programmable controllers share one data transfer device, control can be performed. The input due to the change in the value of the target unit can be collected in one data transfer device, and the memory of a plurality of programmable controllers and the memory of one interrupt input card can be effectively used.

According to the second aspect , since the data transfer device has the normal mode counter card support function unit, even when a plurality of programmable controllers share one data transfer device, the moving distance of the control target unit can be reduced. The normal mode input / output of the normal mode counter card to be simply measured can be collected in one data transfer device, and the memory of a plurality of programmable controllers and the memory of one normal mode counter card can be effectively used.

According to the third aspect , since the data transfer device has the length measurement mode counter card support function unit, even when a plurality of programmable controllers share one data transfer device, the movement distance of the control target unit is controlled. The length measurement mode input / output of the length measurement mode counter card can be integrated into one data transfer device, and the memories of a plurality of programmable controllers and the memory of one length measurement mode counter card can be used effectively. This has the effect.

According to the fourth aspect , since the data transfer device has the drive interface card support function unit,
Even when a plurality of programmable controllers share one data transfer device, the inputs and outputs of a drive interface for controlling and monitoring a motor drive control device as a control target unit can be integrated into one data transfer device, and a plurality of programmable controllers can be used. And the memory of one drive interface card can be used effectively.

[Brief description of the drawings]

FIG. 1 is a configuration diagram illustrating a plant control device according to a first embodiment.

FIG. 2 is a configuration diagram illustrating a plant control device according to a second embodiment.

FIG. 3 is a configuration diagram illustrating data transfer of an interrupt input card according to a second embodiment.

FIG. 4 is a flowchart illustrating a flow of a process according to a second embodiment.

FIG. 5 is a configuration diagram illustrating a plant control device according to a third embodiment.

FIG. 6 is an operation explanatory diagram of the third embodiment.

FIG. 7 is a configuration diagram illustrating a plant control device according to a fourth embodiment.

FIG. 8 is an operation explanatory diagram of the fourth embodiment.

FIG. 9 is a configuration diagram illustrating a plant control device according to a fifth embodiment.

FIG. 10 is an operation explanatory diagram of the fifth embodiment.

FIG. 11 is a diagram showing Example 5 and Comparative Example.

FIG. 12 is a configuration diagram showing a conventional plant control device.

[Explanation of symbols]

1 Programmable controller, 4 bus type transmission line, 5
Data transfer device, 10 special input / output card, 10-1
Interrupt input card, 10-2 Normal mode counter card, 10-3 Measurement mode counter card, 10-
4 drive interface card, 11 digital / analog input / output card, 12 special input / output card support function section, 12-1 interrupt input card support function section, 1
2-2 Normal mode counter card support function unit, 12-
3 Measurement mode counter card support function unit, 12-4
Drive interface card support function section.

Continuation of the front page (56) References JP-A-7-56501 (JP, A) JP-A-6-70380 (JP, A) JP-A-60-164747 (JP, A) JP-A-5-197406 (JP) , A)

Claims (4)

(57) [Claims] 1. A plurality of programmers for controlling a plant.
Controllers and each of these programmable controllers
That interface the controller with the I / O card
Plant control with a transfer device connected via a bus-type transmission line
In the device, the value of the control target part is provided to the data transfer device.
Changes, the interrupt input
Interrupt input card support function unit features and to pulp plant controller that example Bei a for data exchange with over de. 2. A plurality of programmers for controlling a plant.
Controllers and each of these programmable controllers
That interface the controller with the I / O card
Plant control with a transfer device connected via a bus-type transmission line
In the device, the transfer of the control target unit is performed to the data transfer device.
Normal mode counter card for simply measuring moving distance
Normal mode counter card support function unit features and to pulp plant controller that example Bei a for data exchange with. 3. A plurality of programmers for controlling a plant.
Controllers and each of these programmable controllers
That interface the controller with the I / O card
Plant control with a transfer device connected via a bus-type transmission line
In the device, the transfer of the control target unit is performed to the data transfer device.
Measure the moving distance and compare the measured moving distance
Length measurement mode counter for judging the length by comparing with the value
Features and to pulp plant controller that example Bei length measuring mode counter card support function unit for performing data exchange with Takado. 4. A plurality of programmers for controlling a plant.
Controllers and each of these programmable controllers
That interface the controller with the I / O card
Plant control with a transfer device connected via a bus-type transmission line
In the apparatus, to the data transfer device, characterized and to pulp plant control device further comprising a drive interface card support function unit for performing data exchange with the drive interface card for controlling monitoring a drive control device.