JP3349940B2 - Link unit for programmable controller - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a link unit for a programmable controller, and more particularly to a link device for connecting a plurality of programmable controllers (hereinafter referred to as PCs) for executing a series of sequence processing programs described by a user through a communication line. The present invention relates to a link unit that enables data to be transmitted and received between PCs via a memory.

[0002]

2. Description of the Related Art FIG. 11 shows a conventional example of a PC and a link unit. In FIG. 11, 100 is a PC, 2
00 indicates each link unit. PC100
Has a PCOS unit 101, a user sequence program memory unit 102, and a device memory unit 103. The link unit 200 includes a link OS unit 201
, A link device memory unit 202, and a communication I / F 20.
And 3.

When the PC 100 executes a user sequence program, the PCOS unit 101 fetches the contents of the user sequence program stored in the user sequence program memory unit 102 at any time and executes it directly or indirectly. Is stored in the device memory unit 103 as a work memory. The program itself of the user sequence program and the parameters that are the operating conditions of the program are created by the user, and the user sequence program memory 102
Is stored in

[0004] Each PC may control a device in a stand-alone manner, or may control a device in cooperation with another PC, and is usually used in the latter case. In this case, each of the communication I / Fs 20 is connected by using the link unit 200 connected by one communication line 300.
The transmission processing is performed via the communication device 3.

The link device memory section 202 of the link unit 200 secures an area for storing a link device used when a plurality of PCs transmit and receive data to and from each other, and stores the contents of the device memory section 103 in the link device memory section 202. To the device memory unit 103
Is transmitted to the communication line 300 via the communication I / F 203 to perform transmission processing.

Similarly, data from another link unit passes through the reverse procedure (communication line 300, communication I / F).
The receiving process is performed by reading out the data taken into the link unit 200 into the device memory unit 103 (203, passing through the link device memory unit 202 in reverse).

[0007] These transmission and reception processes are performed by the link OS unit 201.
The user sequence program exchanges data with another PC via the link device.

FIG. 12 shows a portion of a conventional user sequence program which controls a link device. Step 1011 shows a description example in which the process 1 is executed only when the value of a certain link device matches a certain value as a condition for executing the process 1.

Step 1011A shows a specific example of this, and the content of the link device 1 is H1234.
(1234 in hexadecimal) indicates that the signal 1 is turned on. Step 1012 shows a description example in which the process 2 is executed only when all the comparison operations of a plurality of link devices are satisfied (AND condition).

[0010] Step 1012A shows a specific example thereof, in which the content of the link device 1 is H1234.
(1234 hexadecimal), the content of link device 2 is equal to H5678 (5678 hexadecimal), and the content of link device 3 is H9ABC (9AB hexadecimal).
If it is equal to C), the content that the signal 1 is turned on is expressed.

Step 1013 shows an example of a description for executing the process 3 only when one of the comparison operations of a plurality of link devices is satisfied (OR condition). Step 1013A shows a specific example, in which the content of the link device 1 is equal to H1234 (Hex 1234) or the content of the link device 2 is H5678 (Hex 5678).
Or the content of the link device 3 is H9ABC (1
It expresses that the signal 1 is turned on if it is equal to 9 hexadecimal (ABC).

[0012]

When a user sequence program is created, it is natural to read and write the device memory unit (hereinafter, this will be referred to as device access). The reading and writing of the link device (hereinafter referred to as link access) are also described in the user sequence program in the same number as the device access.

Due to the characteristics of the PC, the user can freely write an arbitrary program, and the user must also manage all the execution timings of the program. This means that when exchanging data with another PC, the other P
It means that it is necessary for the user to write the user sequence program at the user's responsibility for the operation timing of the data received from C.

Therefore, as the number of connected external devices such as PCs and touch panels on the communication line increases, the number of operations in the user sequence program increases. As a result, the number of user sequence program steps increases, This increases the execution time of the user sequence program. This is especially true in recent years with PC
Against the increase in the number of users who want to reduce the execution time of the user sequence program.

In recent years, system downsizing has become the mainstream of recent demands, and an increase in the number of user sequence program steps leads to an increase in memory mounted on a PC, which also hinders miniaturization of the PC.

As a characteristic of an electronic device such as a PC, data input / output to / from an external device is significantly longer than access time to an internal memory, and an increase in access of a link device located outside the PC increases a user sequence program execution time. The impact on the increase is large.

The present invention has been made to solve the above-mentioned problems, and can simplify the development of a user sequence program, reduce the number of steps of the user sequence program, reduce the number of link device accesses, and reduce the number of user sequence programs. It is an object of the present invention to obtain a PC link unit that can reduce the execution time.

[0018]

In order to achieve the above object, a link unit for a programmable controller according to the present invention connects a plurality of programmable controllers executing a series of user-written sequence processing programs via a link device memory. An interrupt generation condition registering section for registering an interrupt condition to be generated for a user sequence program, and an interrupt number registering section for registering an interrupt number to be generated, in a link unit for a programmable controller which is connected to each other so as to be capable of transmitting and receiving. A comparing unit that compares the content of the link device memory with the content registered in the interrupt condition registering unit; and an interrupt generating unit that generates an interrupt to the user sequence program when the comparison result by the comparing unit matches. Is the interrupt number for identifying the generated interrupt as it has the interrupt number notification unit for notifying to the programmable controller.

To achieve the above object, a link unit for a programmable controller according to the present invention transmits and receives a plurality of programmable controllers executing a series of user-written sequence processing programs to each other via a link device memory. An interrupt generation condition registration unit for registering a plurality of interrupt conditions to be generated for the user sequence program in the link unit for the programmable controller to be connected, an interrupt number registration unit for registering the number of the interrupt to be generated, An arithmetic unit for determining whether a condition is satisfied for each of the plurality of contents of the link device memory and the plurality of contents of the interrupt occurrence condition registration unit, and performing a logical operation on the plurality of determination results; User according to calculation result An interrupt generator for generating an interrupt to over Ken scan program and the interrupt number for identifying the generated interrupt as it has the interrupt number notification unit for notifying to the programmable controller.

A link unit for a programmable controller according to the next invention is the link unit for a programmable controller according to the invention described above, wherein the arithmetic unit and the interrupt generation unit satisfy all of a plurality of conditions of an interrupt generation condition registration unit. It is configured to generate an interrupt to the user sequence program only in the case.

According to another aspect of the present invention, there is provided a link unit for a programmable controller which transmits and receives a plurality of programmable controllers executing a series of user-written sequence processing programs via a link device memory. An interrupt generation condition / number registration unit for registering a plurality of pairs of interrupt conditions and interrupt numbers to be generated for a user sequence program in a link unit for a programmable controller to be connected, and a plurality of link device memories An operation unit for determining whether or not the conditions are satisfied for each of the contents of the plurality of interrupt generation conditions of the interrupt generation condition / number registration unit, and performing a logical operation of the plurality of determination results; Depending on the operation result, An interrupt generator for generating an interrupt to Nsu program and the interrupt number for identifying the generated interrupt as it has the interrupt number notification unit for notifying to the programmable controller.

A link unit for a programmable controller according to the next invention is the link unit for a programmable controller according to the invention described above, wherein the operation unit and the interrupt generation unit are any of a plurality of conditions of an interrupt generation condition / number registration unit. When at least one of the conditions is satisfied, an interrupt is generated for the user sequence program.

[0023]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a link unit for a programmable controller according to the present invention will be described below in detail with reference to the accompanying drawings.

Embodiment 1 FIG. 1 shows a first embodiment of a link unit for a programmable controller according to the present invention. In FIG. 1, reference numeral 10 denotes a PC (programmable controller), and reference numeral 20 denotes a link unit.

The PC 10 includes a PCOS section 11 for performing calculations and control in the PC, a user sequence program memory section 12 for storing a user sequence program, and a PC
The OS unit 11 has a device memory unit 13 used as a work memory for storing the progress of execution of the user sequence program and the execution result.

The link unit 20 has the same basic configuration as that of the related art, and stores a link OS unit 21 for performing communication processing with another PC and a link device for performing communication with another PC. Link device memory unit 22
And a communication I / F unit 23 for performing I / F with the communication line 40.

The link unit 20 includes, in addition to the above-mentioned components, an interrupt condition registering unit 24 for registering an interrupt condition to be generated for the user sequence program, and an interrupt number (interrupt identification number) to be generated. ), A comparison unit 26 that compares the contents of the link device memory unit 22 with the contents of the interruption condition registration unit 24, and the result of comparison by the comparison unit 26 is the contents of the interruption condition. An interrupt number notifying unit 27 for storing an interrupt number to be notified to the PCOS unit 11 when they match, and an interrupt generating unit 28 for generating an interrupt.

In other words, if the content of the interrupt condition registered in the interrupt condition registering unit 24 matches the content of the link device memory unit 22, the comparing unit 26 registers the interrupt condition in the interrupt number registering unit 25. The interrupt number is written to the interrupt number notifying section 27, and a command signal for generating an interrupt to the user sequence program is output to the interrupt generating section 28.

FIG. 2 shows the interrupt generation condition registration unit 2
4 and the interrupt number registration unit 25, as shown in FIG.
This shows a state in which the content of 011A is set.

The contents of the interrupt condition registering section 24 and the interrupt number registering section 25 are set in advance by the user. The registration method includes a method in which a user adds a process for describing an interrupt occurrence condition registration process and an interrupt number registration process to a part of a user sequence program, and executes the registration program. When creating parameters to set the operating conditions of the program,
There is a method by registering an interrupt generation condition and an interrupt number.

The former case can be carried out in the same manner as the access of the link device, and the only difference is that the address to be accessed is changed. In the latter case, as in the conventional example, it is an additional item when creating the parameter. Set.

Next, an operation flow of the link unit having the above configuration will be described with reference to FIG. The link OS unit 21 performs the same series of transmission processing as the conventional one (step S11), and when the transmission processing is completed, the comparison unit 26 causes the contents of the link device memory unit 22 and the interrupt occurrence condition registration unit 2
4 (step S1).
2). The comparison process in the comparison unit 26 determines the result based on whether or not the contents of the pure comparison match.

If the comparison result is "match" (step S
13 is affirmative), the user-set interrupt number is read from the interrupt number registration unit 25 (step S14), and is written to the interrupt number notifying unit 27 (step S15), so that the PCOS unit 11 is notified of the interrupt number and This occurs (step S16).

Here, since the link OS unit 21 only gives the PC 10 an opportunity to temporarily stop the currently executed user sequence program, the process returns to step S11 to perform the transmission process after the completion of the interrupt. If the comparison result is not “match” (No at Step S13), the process immediately returns to Step S11 to perform the transmission process.

The PCOS unit 11 that has accepted the interrupt,
The currently executed user sequence program is temporarily stopped, the contents of the interrupt number notifying section 27 are read, an interrupt is issued to the user sequence program according to the interrupt number, and the interrupt program written by the user is executed.

With the above-described configuration, the comparison process is executed only by registering the interrupt generation condition in the link unit without the user having to separately write the comparison processing program in the user sequence program. It is not necessary to describe the contents of the comparison processing in the sequence program (see step S41 in FIG. 10), and the number of program steps can be reduced. Further, since the PCOS unit 11 does not need to execute the comparison process, the sequence scan time can be reduced.

Embodiment 2 FIG. 4 shows a second embodiment of the link unit for a programmable controller according to the present invention. In FIG. 4, portions corresponding to those in FIG. 1 are denoted by the same reference numerals as those in FIG. 1, and description thereof will be omitted.

In this embodiment, the interrupt condition registering section 24 includes a plurality of interrupt condition register areas 24.
_{1 to} 24 _n and its interrupt generation condition registration area 2
4 ₁ and forms a to 24 _n each interrupt generation condition table registered the interrupt generation condition 1~n of, and to be able plurality registering interrupts condition to be generated to the user sequence program.

In this embodiment, an operation unit 29 is provided instead of the comparison unit 26. The operation unit 29 determines whether or not a condition is satisfied for each of the plurality of contents of the link device memory unit 22 and the plurality of contents of the interrupt occurrence condition registration unit 24, and performs a logical operation on the plurality of determination results. For example, an AND logic operation is performed, and only when all of a plurality of interrupt occurrence conditions are satisfied, the interrupt number registered in the interrupt number registering unit 25 is written to the interrupt number notifying unit 27, and the interrupt to the user sequence program is performed. Is output to the interrupt generation unit 28.

FIG. 5 shows an interrupt generation condition registration unit 2
4 and the interrupt number registration unit 25, as shown in FIG.
12 shows a state in which the content of 012A is set.

Next, an operation flow of the link unit having the above configuration will be described with reference to FIG. The link OS unit 21 performs a series of transmission processes in the same manner as the conventional one (step S21).
Is calculated (step S22). Check that the condition is satisfied,
If the condition is not satisfied (No at Step S23), there is no need to perform the subsequent calculations, and the process returns to Step S21.
A series of transmission processing is restarted.

On the other hand, if the condition is satisfied (Yes at step S23), it is checked whether another condition is registered (step S24). If there is another condition, the calculation unit 29 calculates the next condition (step S25), and returns to step S23 to check whether the next condition is satisfied.

A loop is performed until all the conditions are satisfied and there are no more conditions to be calculated or the conditions are no longer satisfied. When it is determined that all the conditions are satisfied and there are no more conditions to be calculated (Yes at step S24), the user-set interrupt number is read from the interrupt number register 25 as in the first embodiment (step S2).
6) By writing this in the interrupt number notifying section 27 (step S27), the interrupt number is notified to the PCOS section 11 and an interrupt is generated (step S28).

According to the above-described configuration, even if the user does not bother to write the comparison processing program in the user sequence program, the user can register a plurality of interrupt generation conditions in the link unit, and can register the plurality of interrupt generation conditions. When all the conditions are satisfied, an interrupt is generated at a predetermined timing according to the result of the logical operation inside the link unit.
This can be generated for the COS unit, and there is no need to describe the contents of the logical operation processing in the user sequence program (see step S42 in FIG. 10), and the number of program steps can be reduced. Further, since the PCOS unit 11 does not need to execute the logical operation processing, the sequence scan time can be reduced.

Embodiment 3 FIG. 7 shows a third embodiment of the link unit for a programmable controller according to the present invention. In FIG. 7, portions corresponding to FIGS. 1 and 4 are denoted by the same reference numerals as those in FIGS. 1 and 4, and description thereof is omitted.

In this embodiment, the interrupt occurrence condition registration unit 24 and the interrupt number registration unit 2 in the first embodiment
Interruption condition / number registration unit 3 that integrates 5 and 5
0 is provided.

The interrupt condition / number registration unit 30 stores
Several interrupt generation conditions / number registration area 30₁~ 30
_nAnd an interrupt generation condition / number registration area 30₁~
30 _nThe interrupt generation condition and interrupt number for each
Create an interrupt generation condition table registered as a set
Generated for the user sequence program
Multiple interrupt conditions can be registered.
You.

The operation unit 29 is provided in the link device memory unit 2
2 and the contents of the plurality of interrupt occurrence conditions of the interrupt occurrence condition / number registration unit 30 are determined as to whether or not the conditions are satisfied, and a logical operation of the plurality of determination results is performed. If any one of the plurality of interrupt generation conditions is satisfied, the interrupt number registered in the interrupt generation condition / number registration unit 30 (the interrupt number of the group where the condition is satisfied) is notified to the interrupt number notification unit. 27, and outputs a command signal for generating an interrupt to the user sequence program to the interrupt generation unit 2.
8 is output.

FIG. 8 shows how the contents of step 1013A in FIG. 12 are set in the interrupt condition / number registration unit 30.

Next, an operation flow of the link unit having the above configuration will be described with reference to FIG. The link OS unit 21 performs a series of transmission processing in the same manner as the conventional one (step S31).
(Step S32). Check that the condition is satisfied,
If the condition is satisfied (Yes at Step S33), the interrupt number of the corresponding condition (condition 1 in this case) is read from the interrupt occurrence condition / number registering unit 30 (Step S36),
By writing this interrupt number notification unit 27 (step S 37), notifies the interrupt number to the PCOS unit 11, generates an interrupt (step S38).

On the other hand, if the condition is not satisfied (No at Step S33), it is checked whether another condition is registered (Step S34). If there is another condition, the calculation unit 29 calculates the next condition (step S35), and returns to step S33 to check whether the next condition is satisfied.

Thereafter, a loop is performed until there are no more conditions to be operated, or until at least one operation result is satisfied. In this case, a plurality of conditions for performing logic operations in the order they are set, the higher highest priority to that first described.

With the above-described configuration, even if the user does not bother to write the comparison processing program in the user sequence program, only by registering a plurality of interrupt occurrence / number conditions in the link unit, a plurality of interrupts can be obtained. An interrupt can be generated to the PCOS unit at a predetermined timing according to the result of the logical operation inside the link unit, such as when one of the conditions occurs, and the contents of the logical operation processing must be described in the user sequence program Is eliminated (see FIG. 10), and the number of program steps is reduced. Further, since the PCOS unit 11 does not need to execute the logical operation processing, the sequence scan time can be reduced.

In FIG. 10, steps S41 to S41 are performed.
Step S43 shows interrupt numbers 1 to 3.

[0055]

As can be understood from the above description, according to the link unit for a programmable controller according to the present invention, an interrupt can be generated in the link unit even if the user does not bother to write the comparison processing program in the user sequence program. Since the comparison process is executed only by registering the conditions, the content of the comparison process need not be described in the user sequence program, the number of program steps can be reduced, and the comparison process is executed on the programmable controller side. Because there ’s no need to
The sequence scan time can be reduced.

As a result, the latest link device data can always be compared asynchronously with the execution of the programmable controller, and the user is free from the trouble of writing the program on the user sequence program with care of the timing. In addition, the program can be simplified and the efficiency can be improved, and the reduction in the number of steps makes it possible to reduce the cost, size, and sequence execution of the programmable controller.

According to the link unit for a programmable controller according to the next invention, even if the user does not bother to write the comparison processing program in the user sequence program, the user only needs to register a plurality of interrupt generation conditions in the link unit. PCOS issues an interrupt at a predetermined timing based on the result of a logical operation inside the link unit, such as when all of a plurality of interrupt occurrence conditions are satisfied.
This can be generated for a unit, and it is not necessary to describe the contents of logical operation processing in a user sequence program, and the number of program steps can be reduced. Also, P
Since the COS unit does not need to execute the logical operation processing, the sequence scan time can be reduced.

As a result, the operation can always be performed with the latest link device data asynchronously with the execution of the programmable controller, and the user is free from the trouble of writing the program on the user sequence program with care of the timing. In addition, the program can be simplified and the efficiency can be improved, and the reduction in the number of steps makes it possible to reduce the cost, size, and sequence execution of the programmable controller.

According to the link unit for a programmable controller according to the next invention, even if the user does not bother to write the comparison processing program in the user sequence program, only a plurality of interrupt generation conditions are registered in the link unit. An interrupt can be generated to the PCOS unit at a predetermined timing only when all of a plurality of interrupt generation conditions are satisfied, and there is no need to describe the contents of the logical operation processing in the user sequence program. Reduction is achieved.
Further, since the PCOS section does not need to execute the logical operation processing, the sequence scan time can be reduced. Further, since it is not necessary to execute the arithmetic processing on the programmable controller side, the sequence scan time can be reduced.

As a result, the latest link device data can always be calculated asynchronously with the execution of the programmable controller, and the user is free from the trouble of writing a program on a user sequence program while paying attention to the timing. In addition, the program can be simplified and the efficiency can be improved, and the reduction in the number of steps makes it possible to reduce the cost, size, and sequence execution of the programmable controller.

According to the link unit for a programmable controller according to the next invention, even if the user does not bother to write a comparison processing program in the user sequence program, only a plurality of interrupt occurrence / number conditions are registered in the link unit. When one of a plurality of interrupt generation conditions is satisfied, an interrupt can be generated to the PCOS unit at a predetermined timing based on the result of the logical operation in the link unit, and the logical operation processing is performed in the user sequence program. Need not be described, and the number of program steps can be reduced. Further, since it is not necessary to execute the arithmetic processing on the programmable controller side, the sequence scan time can be reduced.

As a result, the operation can always be performed with the latest link device data asynchronously with the execution of the programmable controller, and the user is free from the burden of writing the program on the user sequence program with care of the timing. In addition, the program can be simplified and the efficiency can be improved, and the reduction in the number of steps makes it possible to reduce the cost, size, and sequence execution of the programmable controller.

According to the link unit for a programmable controller according to the next invention, even if the user does not bother to write a comparison processing program in the user sequence program, only a plurality of interrupt occurrence / number conditions are registered in the link unit. Therefore, if at least one of the plurality of interrupt generation conditions is satisfied, an interrupt can be generated to the PCOS unit at a predetermined timing, and it is not necessary to describe the contents of the logical operation processing in the user sequence program. The number of steps can be reduced. Further, since it is not necessary to execute the arithmetic processing on the programmable controller side, the sequence scan time can be reduced.

As a result, the latest link device data can always be calculated asynchronously with the execution of the programmable controller, and the user is not bothered by writing the program on the user sequence program with care of the timing. In addition, the program can be simplified and the efficiency can be improved, and the reduction in the number of steps makes it possible to reduce the cost, size, and sequence execution of the programmable controller.

[Brief description of the drawings]

FIG. 1 is a block diagram showing Embodiment 1 of a link unit for a programmable controller according to the present invention.

FIG. 2 is a block diagram showing an example of registration of interrupt occurrence conditions and numbers in the link unit for a programmable controller according to the first embodiment;

FIG. 3 is a flowchart showing an operation flow of the link unit for the programmable controller according to the first embodiment;

FIG. 4 is a block diagram showing Embodiment 2 of a link unit for a programmable controller according to the present invention.

FIG. 5 is a block diagram showing an example of registration of an interrupt generation condition and a number in a link unit for a programmable controller according to a second embodiment;

FIG. 6 is a flowchart showing an operation flow of the link unit for a programmable controller according to the second embodiment;

FIG. 7 is a block diagram showing Embodiment 3 of a link unit for a programmable controller according to the present invention.

FIG. 8 is a block diagram showing an example of registration of interrupt occurrence conditions and numbers in a link unit for a programmable controller according to a third embodiment;

FIG. 9 is a flowchart showing an operation flow of the link unit for a programmable controller according to the third embodiment;

FIG. 10 is a ladder diagram showing an example of a user sequence program in a programmable controller using the programmable controller link unit according to the present invention.

FIG. 11 is a block diagram showing a conventional link unit for a programmable controller.

FIG. 12 is a ladder diagram showing an example of a user sequence program in a conventional programmable controller using a programmable controller link unit.

[Explanation of symbols]

10 PC (programmable controller), 11 P
COS section, 12 user sequence program memory section, 13 device memory section, 20 link unit,
21 link OS section, 22 link device memory section,
23 communication I / F section, 24 interrupt generation condition registration section,
25 interrupt number registration unit, 26 comparison unit, 27 interrupt number notification unit, 28 interrupt generation unit, 29 operation unit, 30 interrupt generation condition / number registration unit.

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. ⁷ , DB name) G05B 19/05 G06F 9/46 G06F 13/24

Claims (5)

(57) [Claims] 1. A programmable controller link unit that connects a plurality of programmable controllers executing a series of user-written sequence processing programs to each other via a link device memory so as to be able to transmit and receive each other, to generate a user sequence program. An interrupt generation condition registration unit for registering an interrupt condition, an interrupt number registration unit for registering an interrupt number to be generated, and a comparison for comparing the contents of a link device memory with the contents registered in the interrupt generation condition registration unit An interrupt generation unit that generates an interrupt to the user sequence program when the comparison result by the comparison unit matches; and an interrupt number notification that notifies the programmable controller of an interrupt number for identifying the generated interrupt. Programmable controller link unit, characterized in that it has a section, the. 2. A programmable controller link unit that connects a plurality of programmable controllers executing a series of user-written sequence processing programs to each other via a link device memory so as to be able to transmit and receive each other, to generate a user sequence program. An interrupt condition register for registering a plurality of interrupt conditions, an interrupt number register for registering the number of the interrupt to be generated, a plurality of contents of the link device memory and a plurality of contents of the interrupt condition register each makes a determination of whether the conditions are satisfied, an interrupt generator for generating an arithmetic unit for performing a logical operation of the plurality of determination results, an interruption to the user sequence program in accordance with the logic operation result by the pre-Symbol arithmetic unit To identify the interrupt that occurred And an interrupt number notifying unit for notifying the programmable controller of the interrupt number. 3. The computing unit and the interrupt generating unit,
3. The programmable controller link unit according to claim 2, wherein an interrupt is generated for the user sequence program only when all of a plurality of conditions of the interrupt generation condition registration unit are satisfied. 4. A programmable controller link unit that connects a plurality of programmable controllers executing a series of user-written sequence processing programs to each other via a link device memory so as to be able to transmit and receive each other, to generate a user sequence program. An interrupt condition / number register for registering multiple interrupt conditions and interrupt numbers as a set, and multiple contents of the link device memory and multiple interrupt conditions of the interrupt condition / number register An operation unit that determines whether each condition is satisfied, and performs a logical operation of the plurality of determination results; an interrupt generation unit that generates an interrupt to a user sequence program according to the logical operation result by the operation unit; To identify the interrupt that occurred Programmable controller link unit, characterized in that it has the interrupt number notification unit that notifies the interrupt number to the programmable controller. 5. The computing unit and the interrupt generating unit,
5. The programmable controller according to claim 4, wherein an interrupt is generated for a user sequence program when any one of a plurality of conditions of the interrupt generation condition / number registration unit is satisfied. Link unit.