JP2010225072A - Controller and control method of control system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a controller and a control method of a control system, capable of applying each control group to various uses differed in processing cycle while satisfying the processing performance required for each control group. <P>SOLUTION: The control system capable of internally constructing a plurality of control groups includes a device definition unit 12 and a control logic definition unit 13 capable of setting a specification of each of the control groups including at least a processing cycle; and a management unit 21 which manages the processing schedule of the control groups according to the priority order of the specifications of the individual groups set thereby. <P>COPYRIGHT: (C)2011,JPO&amp;INPIT

Description

  The present invention relates to a controller and a control method of a control system in which a plurality of control groups can be built.

  Conventionally, as sequence control for controlling each process in a production facility, as shown in Patent Document 1 below, a sequence control mechanism that is periodically activated is provided. Specifically, the progress management mechanism performs progress management of the process being executed from the current progress state, and performs step control processing for outputting an ON signal to the corresponding execution register from the control step being started or being executed.

JP 11-265209 A

  However, in the conventional control system, the processing cycle cannot be set for each control group such as each process, each device, and each application in the production facility, and it is difficult to apply to various uses with different processing speeds. is there.

  On the other hand, if a processing cycle is set for each control group, the processing performance required for a control group requiring high-speed processing cannot be satisfied due to distributed processing in each control group. Furthermore, in order to synchronize the processing cycle between the control groups, a plurality of controllers are required, which is not realistic.

  In view of the above circumstances, the present invention provides a controller and a control method for a control system capable of applying each control group to various uses having different processing cycles while satisfying the processing performance required for each control group. The purpose is to provide.

  The controller of the control system of the first invention is a controller of a control system capable of constructing a plurality of control groups therein, specification setting means capable of setting specifications of the control group including at least a processing cycle, and the specification setting And execution management means for managing the processing schedule of the control group according to the priority order of the specifications of the individual control groups set by the means.

  According to the controller of the control system of the first aspect of the invention, the processing schedule corresponding to the specifications including the processing cycles of the plurality of control groups is managed by one controller. Therefore, it is possible to set the processing cycle for each control group, and manage the processing schedule of each control group so as to satisfy the processing performance required for the processing of each control group under each set processing cycle. Can do.

  For example, when a control group that requires high-speed processing and a control group that requires low-speed processing are mixed in the control system, by managing the schedule of each control group, Appropriate processing performance can be distributed to each control group, and each control group can be applied to various uses with different processing cycles.

  Thus, according to the controller of the control system of the first invention, each control group can be applied to various uses having different processing cycles while satisfying the processing performance required for each control group.

  The controller of the control system of the second invention is the controller of the control system of the first invention, wherein the specification of the control group set by the specification setting means includes a processing cycle, a control type, a control target, a processing logic, Is included.

  According to the controller of the control system of the second aspect of the invention, the processing schedule is managed in consideration of the control type, the control target, and the processing logic in addition to the processing cycle, so that the optimal distribution of processing performance required for each control group is achieved. Can be applied to various uses such as different processing speeds.

  A control method for a control system according to a third aspect of the invention is a control system control method capable of constructing a plurality of control groups therein, a specification setting step for setting specifications of the control group including at least a processing cycle, and the specifications And an execution step for managing the processing schedule of the control group according to the priority order of the specifications of the individual control groups set by the setting step.

  According to the control method of the control system of the third aspect of the invention, the processing schedule corresponding to the specifications including the processing cycles of the plurality of control groups is managed by one controller. Therefore, it is possible to set the processing cycle for each control group, and manage the processing schedule of each control group so as to satisfy the processing performance required for the processing of each control group under each set processing cycle. Can do. Accordingly, each control group can be applied to various uses having different processing cycles while satisfying the processing performance required for each control group.

The figure which shows the structure of a control system. Explanatory drawing which shows the process example by the controller of FIG. The figure which shows the processing cycle of a control group. The flowchart which shows the example of management of the processing schedule by a controller.

  As shown in FIG. 1, a control system as an embodiment of the present invention includes a definition unit 1 configured by a computer and a controller 2 that executes arithmetic processing in the system.

  The definition unit 1 includes a database 11, a device definition unit 12, a control logic definition unit 13, and a combination unit 14.

  The database 11 is a storage means for storing and holding data and information. A device or application (apparatus, device, storage area, etc.) that can execute control processing in the system, and a type or parameter that defines its specifications are stored in advance. In addition to being registered, the device selected and set by the user and its specifications are stored and held.

  The device definition unit 12 reads out devices and the like registered in the database 11 and their specifications, and selects a device and the like to be executed by the control process and determines its specifications (including at least the processing cycle) in accordance with a user operation. The selected device and the like and its specifications are output to the database 11, and the contents are stored and held in the database 11.

  The control logic definition unit 13 reads control logic such as devices registered in the database 11 and sets control logic (including at least a processing cycle) according to a user operation. For example, the control logic definition unit 13 sets conditions and timings for starting operations of devices and the like, extracts specific functions from a plurality of pre-registered functions, and combines them to shift in control units. Set conditions. Further, the set control logic is output to the database 11 and the contents are stored and held in the database 11.

  The combination unit 14 reads out the device and the specification selected and determined by the device definition unit 12 and the control logic set by the control logic definition unit 13 from the database 11 and combines (associates) them. The definition information combined by the combining unit 14 is output to the controller 2 via the network.

  The controller 2 includes a management unit 21 and an execution unit 22.

  The management unit 21 constructs an execution processing environment based on the definition information output from the combining unit 14. For example, the management unit 21 manages the processing schedule based on specifications of devices and the like and control logic settings.

  The execution unit 22 executes control processing in the system at a predetermined timing based on the processing schedule of the management unit 21. Specifically, the execution unit 22 includes a plurality of control groups 22a to 22n such as devices and applications that are subdivided according to the contents of the control processing, and the control unit 22a to 22 Each of the processes 22n is executed at a predetermined timing.

  As illustrated in FIG. 2, the control groups 22 a to 22 n of the execution unit 22 of the controller 2 correspond to, for example, functional blocks surrounded by a thick line in the drawing, and the controller 2 executes processing of these functional blocks.

  Specifically, in FIG. 2, the input device operation process, the FBD (Function block diagram) group, and the output device operation process are function blocks, which are one control group.

  As indicated by the broken lines in the figure, the processing of each control group is performed based on the specifications (including at least the processing cycle) determined by the device definition unit 12 as input device operation processing and output device operation processing. The processing of the FBD group is executed based on the control logic (including at least the processing cycle) set by the control logic definition unit 13. Furthermore, a plurality of input device operation processes, FBD groups, and output device operation processes are executed simultaneously.

  Next, with reference to FIG. 3 and FIG. 4, management of a processing schedule for simultaneously executing processing of a plurality of control groups by the management unit 21 of the controller 2 will be described.

  As shown in FIG. 3, when the processing cycle of the FBD group as the control group is a high-speed processing cycle (for example, 1 ms), and the input device operation processing and the output device operation processing are low-speed processing cycles (for example, 3 ms). The management unit 21 manages the processing schedule as shown in FIG.

  That is, the management unit 21 checks whether the high-speed processing cycle of the FBD group has arrived (STEP 21), and if this check is YES, executes the processing of the FBD group (STEP 22).

  Next, it is checked whether or not the processing of the FBD group has been completed (STEP 23). If this check is NO, this check process is repeated until this check becomes YES. If this check is YES, it is checked whether the low speed processing cycle of the input device operation process or the output device operation process has come (STEP 24).

  On the other hand, if the check in STEP 21 is NO, the process skips to STEP 24 and checks the arrival of the low speed processing cycle.

  If this check is NO, the process returns to STEP 21, and if YES, the input device operation process or the output device operation process for which the processing cycle has arrived is executed (STEP 25).

  Next, it is checked whether the input device operation process or the output device operation process is completed (STEP 26), and this check process is repeated until this check is YES. If this check is YES, the process returns to STEP 21 and a series of processing is executed again.

  As described above, according to the controller 2 of the present embodiment, the processing schedule according to the specifications including the processing cycles of a plurality of control groups is managed by one controller. Therefore, it is possible to set the processing cycle for each control group, and manage the processing schedule of each control group so as to satisfy the processing performance required for the processing of each control group under each set processing cycle. Can do. Accordingly, each control group can be applied to various uses having different processing cycles while satisfying the processing performance required for each control group.

  In the present embodiment, the processing schedule is managed by assigning priorities to the control groups based on the processing cycle. However, in addition to or instead of this, based on the control type, the control target, and the processing logic. The processing schedule may be managed by assigning priorities.

  Moreover, although this embodiment demonstrated the form which isolate | separates the definition part 1 and the controller 2 via a network as shown in FIG. 1, these may be integrated. For example, the controller 2 may have the functions of the processing units 11 to 14 of the definition unit 1.

Claims (3)

A controller of a control system capable of constructing a plurality of control groups inside,
Specification setting means capable of setting specifications of the control group including at least a processing cycle;
A controller of a control system, comprising: an execution management unit that manages a processing schedule of the control group according to a priority order of specifications of each control group set by the specification setting unit. The controller of the control system according to claim 1,
The control system controller set by the specification setting means includes a processing cycle, a control type, a control target, and a processing logic. A control method of a control system capable of constructing a plurality of control groups inside,
A specification setting step for setting a specification of the control group including at least a processing cycle;
A control system control method comprising: an execution step of managing a processing schedule of each control group according to a priority order of specifications of each control group set by the specification setting step.

Images