PLC maintenance support device and PLC maintenance support program

摘要

A PLC maintenance supporting apparatus according to the present invention comprises a signal identification tag reader for reading a signal address from a signal identification tag attached to an input and output signal cable of a PLC to identify the signal address of the input and output signal cable, a transmitter for transmission to the SPS of the signal address identified by the signal identifier tag reader, a receiver for receiving the on or off state of a signal corresponding to the transmitted signal address from the PLC, and a monitor for indicating the received on or off state of the signal.