Chapter 3 programming communications requests, Chapter, Programming communications requests – GE 90-30 PLC User Manual

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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:

H Section 1: The Communications Request
H Section 2: The COMMREQ Function Block and Command Block
H Section 3: Channel Commands
H Section 4: Status Data
H 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.