JPH09288585A - Operation order control method for automatic machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an operation order control method for automatic machine with which even the execution of an operating instruction with low priority can be timewisely managed as well in the case of controlling the operation order of an automatic machine based on the priority set to the respective operating instructions. SOLUTION: Concerning the operating instruction with the low priority, the longest waiting time after the generation of this operating instruction is set and in place of the preferential execution of a certain operating instruction (1st operating instruction), the waiting time after the generation of an operating instruction (2nd operating instruction) turned to execution waiting state is measured. When this measured time exceeds the longest waiting time of the relevant operating instruction registered in a table 3 for operation order control, the priority of this 2nd operating instruction is temporarily ranked up to the priority of the 1st operating instruction and after the operating instruction with high priority under execution at present is completely executed, that 2nd operating instruction is executed. Thus, the execution of the operating instruction with low priority can be timewisely managed.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for controlling the operation sequence of an automatic machine.

[0002]

2. Description of the Related Art When an operation instruction generated by a controller is given to an automatic machine to cause the automatic machine to execute a plurality of operations in parallel or in time series, the order of giving the operation instruction to the automatic machine is set for each operation instruction. There is known a control method of changing the priority based on a preset priority order.

An example of operation sequence control according to FIG. 3 is shown. In the same figure ,,,,, indicate the operation instructions given to the automatic machine, and it is assumed that the operation instructions are generated in the order from. The priority relationship is such that ,,,, are higher, and lower. The horizontal axis is the time axis, and time elapses from left to right. In addition, ○ indicates the generation of the operation instruction, ● indicates the start of the operation execution, and ◎ indicates the timing of the operation completion.

In this example, first occurs, and then occurs before the operation of is completed. Here, since the priority is lower, after the operation is completed, is preferentially executed, and is in the execution waiting state. afterwards,
And occur before the operation of is completed. In this case as well, since the priority is lower, after the operation of is completed, is preferentially executed. Similarly, and are executed before. Thus, the execution of the low priority is started after the completion of the series of operations of the high priority (after the completion of the operation).

Therefore, according to this operation sequence control method, by setting a high priority to an operation instruction regarding an important operation which should be processed with priority over other operations, the important operation is exclusively processed at high speed. can do.

[0006]

On the other hand, in such an operation sequence control method, when is the operation by the operation instruction of the low priority generated during the execution of the operation instruction of the high priority started and completed? It has a problem that it cannot be predicted.

Further, as shown in the example of FIG. 3, when a number of high priority operation instructions occur in succession, the execution waiting state of the low priority operation instructions is very long and the priority is low. Although it is an operation instruction, depending on the content, it may cause a problem in control of the automatic machine.

The present invention is intended to solve such a problem, and when controlling the operation order of the automatic machine based on the priority order set for each operation instruction, the operation instruction with the lower priority order is given. It is an object of the present invention to provide an operation sequence control method for an automatic machine, which enables execution to be temporally managed.

[0009]

In order to achieve the above object, the operation sequence control method for an automatic machine according to the present invention sets priorities for a plurality of operation instructions to be given to an automatic device in advance. In the method of controlling the operation sequence of the automatic machine so that the operation instructions generated in time series are executed in descending order of priority, at least one excluding operation instructions set in advance with the highest priority. The longest waiting time after the occurrence of the operation instruction is set for the operation instruction of the part, and the second operation instruction that is in the execution waiting state is generated instead of preferentially executing the certain first operation instruction. When the subsequent waiting time exceeds the preset maximum waiting time for the second operation instruction, the priority of the second operation instruction is tentatively advanced to the priority of the first operation instruction. The second
Is controlled so as to execute the operation instruction, and by this, it becomes possible to temporally manage the execution of the operation instruction having a low priority.

[0010]

Embodiments of the present invention will be described below.

FIG. 1 is a diagram showing a configuration of an operation sequence control device for an automatic machine according to an embodiment of the present invention.

In FIG. 1, reference numeral 1 is a priority order setting section for setting a relative priority order for a plurality of operation instructions to be given to the automatic device 10. Reference numeral 2 denotes a longest waiting time setting unit that sets the longest waiting time after the operation instruction is generated for at least a part of the operation instructions having a low priority. Reference numeral 3 is an operation sequence control table for registering the setting contents of the priority setting unit 1 and the longest waiting time setting unit 2 in association with the types of operation instructions. Reference numeral 4 denotes an operation instruction generation unit that generates operation instructions to be given to the automatic device 10 in time series, obtains a response indicating the state (operation result) from the automatic device 10, and selects the operation instruction to be generated and the timing. Control. An operation order control unit 5 controls the order of operation instructions given to the automatic device 10 based on the priority order of the operation instructions registered in the operation order control table 3. Further, 6 is a certain operation instruction under the control of the operation sequence control unit 5 (provisionally,
This is called the first operation instruction. ) Is preferentially executed, the waiting time after the occurrence of the operation instruction in the execution waiting state (temporarily called the second operation instruction) is measured, and the measured time is stored in the operation sequence control table 3. When the maximum waiting time of the registered corresponding operation instruction is exceeded, the priority of the second operation instruction is provisionally advanced to the priority of the first operation instruction.

Next, the operation of the operation sequence control device for the automatic machine will be described.

First, the priority setting unit 1 is used to set priorities for a plurality of operation instructions given to the automatic device 10. Two or more priorities can be set, but here two ranks are used to facilitate understanding of the invention.

Next, the longest waiting time setting unit 2 is used to set the longest waiting time after an operation instruction is generated for an operation instruction having a low priority.

The above setting contents are stored in the operation sequence control table 3 in association with the types of operation instructions. By the above, the setting before operating the automatic machine 10 is completed.

The operation order control unit 5 checks the priority order of the operation instructions generated by the operation instruction generation unit 4 with reference to the operation order control table 3, and preferentially executes the operation instruction with a higher priority order. The operation instruction is given to the automatic machine 10.
The operation instruction with the lower priority is in a waiting state during the execution period of the operation instruction with the higher priority.

The priority advance processing unit 6 has a clock function, and instead of preferentially executing a certain operation instruction (first operation instruction) under the control of the operation order control unit 5, it is in an execution waiting state. The waiting time from the generation of the operation instruction with the lower priority (second operation instruction) is measured. Furthermore, the priority advance processing unit 6 refers to the operation sequence control table 3 to check the longest waiting time of the corresponding operation instruction, and compares the measured waiting time with the longest waiting time. Then, when confirming that the counted waiting time exceeds the maximum waiting time, the priority advance processing unit 6 provisionally advances the priority of the second operation instruction to the priority of the first operation instruction. Notify the operation sequence control unit 5. In response to this notification, the operation order control unit 5 automatically executes the operation instruction so that the second operation instruction having the higher priority is executed after the execution of the operation instruction having the higher priority currently being executed is completed. Give to the machine 10.

An example of operation sequence control according to FIG. 2 is shown. In FIG. 2, symbols ,,,, indicate operation instructions given to the automatic machine, and it is assumed that the operation instructions are generated in the order from. The priority relationship is such that ,,,, are higher, and lower. The horizontal axis is the time axis, and time elapses from left to right. In addition, ○ indicates the generation of the operation instruction, ● indicates the start of the operation execution, and ◎ indicates the timing of the operation completion. Tmax
Is the longest waiting time set for low priority.

In this example, first occurs, and then occurs before the operation of is completed. Since the priority is lower here, after the operation of is completed, is preferentially executed, and becomes a waiting state. In the waiting state, the priority advance processing unit 6 starts counting the elapsed time in the waiting state. Then, and occur before the operation of is completed. In this case as well, the priority is lower than that, and since the time waiting time of the waiting state does not exceed the maximum waiting time Tmax, after the operation of is completed, and are preferentially executed sequentially. After that, before the operation of is completed, occurs, but by confirming that the time waiting time before that exceeds the maximum waiting time Tmax, the priority of here is changed to the higher order. .
Then, the operation of is started after the operation of is completed.

Thus, according to the operation sequence control device for the automatic machine of the present embodiment, the execution of the operation instruction with the low priority order can be performed in time only by setting the operation instruction with the low priority order and setting the longest waiting time. It becomes possible to manage it.

[0022]

As described above, according to the present invention, the execution of a low-priority operation instruction is temporally managed only by setting the long-waiting time by setting the operation instruction with a low priority order. It becomes possible.

[Brief description of drawings]

FIG. 1 is a diagram showing a configuration of an operation sequence control device for an automatic machine according to the present invention.

2 is an example of operation sequence control by the operation sequence control device for the automatic machine shown in FIG. 1;

FIG. 3 is an example of operation sequence control by a conventional operation sequence control method.

[Explanation of symbols]

 1 ... Priority setting section 2 ... Longest waiting time setting section 3 ...... Operation sequence control table 4 ...... Operation instruction generation section 5 ...... Operation sequence control section 6 ...... Priority raising process Part 10: Automatic machine

Claims (1)

[Claims] 1. A priority order is set for a plurality of operation instructions to be given to an automatic device in advance, and each operation instruction generated in a time series is preferentially executed in descending order of priority. In a method of controlling an operation sequence of an automatic machine, a longest waiting time after the occurrence of the operation instruction is set for at least a part of the operation instructions excluding the operation instruction having the highest priority set in advance. When the waiting time after the occurrence of the second operation instruction that is in the execution waiting state instead of being preferentially executed for the first operation instruction exceeds the longest waiting time preset for the second operation instruction An operation sequence control of an automatic machine, characterized in that the priority order of the second operation instruction is tentatively moved up to the priority order of the first operation instruction to execute the second operation instruction. Method.