The ethernet interface, Ethernet communications system – FANUC Robotics America GFK-1541B User Manual

Page 7

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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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