ONLINE COMMUNICATION ADAPTER

摘要

PROBLEM TO BE SOLVED: To enable remote monitoring without changing the existent program of a programmable controller(PLC) for facility control. SOLUTION: By providing an online communication adapter 4 between a PLC 1 and a PHS 31 in the figure in order to remotely monitor the data of the PLC through a public line, it is not necessary to provide a communication program for remote monitoring corresponding to each of PLC.