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

This system program includes a library of procedures 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. When schedule-building data including specifications of execution order of procedures included in the procedure library are stored in storage means, the system program causes the microprocessor to execute the procedures included in the procedure library according to the specifications of the execution order of the procedures included in the schedule-building data.