This section describes the message communication. The PLC program instructions IOWR and IORD are used
to transfer the messages to and from the Unit.
5-1 Message communication........................................................................................................................................ 70
5-2 IOWR / IORD........................................................................................................................................................ 70
5-3 Error log................................................................................................................................................................. 72
5-4 Reading the error log ............................................................................................................................................. 74
5 Message communication, IOWR / IORD
69