SYNCHRONIZATION METHOD FOR MODULAR TYPE PROGRAMMABLE CONTROLLER AND MODULAR TYPE PROGRAMMABLE CONTROLLER

摘要

PROBLEM TO BE SOLVED: To provide a programmable controller device capable of surely transferring data between controllers without placing a limit on the number of mounting of open modules.;SOLUTION: When a data storage instruction S17 from a PLC module 100 is inputted by an interrupting signal S14, an option module 200 stores the data of the PLC module 100 into a memory 225. When the interrupting signal S14 is inputted in a data update cycle, the option module 200 calculates data to be outputted to a control unit, and outputs the data to the control unit. The PLC module 100 holds the stand-by state without executing any user program until the data of the PLC module 100 are captured by the option module 200, and the PLC module 100 executes the user program according to a data storage completion signal from the option module 200.;COPYRIGHT: (C)2004,JPO