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3
Chapter
3-1
GFK-1084B
Programming Communications Requests
This chapter describes how to program PLC to PLC communications over the Ethernet
Network. Details of the COMMREQ function and the Channel commands are pres-
ented here. The chapter is divided into 5 sections:
Section 1: The Communications Request
Section 2: The COMMREQ Function Block and Command Block
Section 3: Channel Commands
Section 4: Status Data
Section 5: Controlling Communications in the Ladder Program
Note
This chapter applies only to PLCs being used as client PLCs to initiate
communications. No programming is required for server operation.