CPU UNIT FOR PLC, PLC-USE SYSTEM PROGRAM, RECORDING MEDIUM IN WHICH PLC-USE SYSTEM PROGRAM IS STORED, PLC SYSTEM, PLC SUPPORT DEVICE, PLC SUPPORT PROGRAM, AND RECORDING MEDIUM IN WHICH PLC SUPPORT PROGRAM IS STORED

摘要

A system program includes a procedure library in which at least a procedure for controlling execution of a control program and a procedure for controlling output of output data and input of input data are included. If schedule-building data including execution order specifications for the procedures included in the procedure library is stored in a storage section, the system program causes a microprocessor to execute the procedures included in the procedure library in accordance with the procedure execution order specifications included in schedule-building data.

主权项

1. A CPU unit in a PLC configured to control a control target, the CPU unit comprising:
a microprocessor; a storage section; and a communication circuit, wherein: the storage section is used to store a system program, a control program, and schedule-building data; the microprocessor executes the system program and the control program stored in the storage section; the communication circuit transmits output data generated through execution of the control program and receives input data to be used in execution of the control program; the system program includes a procedure library in which at least a procedure for controlling execution of the control program and a procedure for controlling output of the output data and input of the input data are included; and if the schedule-building data including execution order specifications for the procedures included in the procedure library is stored in the storage section, the system program causes the microprocessor to execute the procedures included in the procedure library in accordance with the procedure execution order specifications included in schedule-building data.