GE GFK-1541B - Manual (Page 7)

1-2 TCP/IP Ethernet Communications for the Series 90™ PLC User's Manual – May 2002 GFK-1541B
1
The Ethernet Interface
The Ethernet Interface enables Series 90 PLCs to communicate with other Series 90 PLCs, with
with GE Fanuc PLC programming software, and with applications developed using the SRTP
protocol, such as CIMPLICITY® HMI.
The Ethernet Interfaces described in this manual have “client/server” capability. As a “client” the
Interfaces can initiate communications with other Series 90 PLCs containing Ethernet Interfaces.
This is done from the PLC ladder program using the COMMREQ function. As a “server” the
Interfaces respond to requests from other devices such as PLC programming software, a Host
computer running an SRTP application, or another Series 90 PLC acting as a “client”. No PLC
programming is required for server operation.
Ethernet Communications System
The diagram below represents a basic Ethernet Communications system.
Transceiver Transceiver
Interface
Ethernet
Series 90-70
PLC
Network
Transceiver
Connection
Ethernet
Cable
Interface
Ethernet
Network
Transceiver
Connection
Programmer
Transceiver
Series 90-30
PLC
Host Computer or
SRTP Application
Control Device Running an
Series 90-30
PLC
with Embedded
Ethernet Interface
CPU 364 or 374
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