Omron CJ - 09-2009 Operation Manual page 171

Programmable controllers

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Expanded System Configuration

Serial Communications

Board/Unit with unit

version 1.2 or later

PLC (Host Link Master)

FINS Messages

FINS (Factory Interface Network Service) messages are commands and

responses that are used as a message service in an OMRON Network. FINS

messages enable the user to control operations such as sending and receiv-

ing data and changing operating modes when necessary. The features of

FINS messages are as follows:

Flexible Communications

FINS messages are defined in the application layer and do not rely on the

physical layer, data link layer, or other lower-level layers. This enables flexible

communications on the CPU bus and different types of networks. Basically,

communications with Ethernet, Controller Link, or Host Link Networks, and

between the CPU Unit and CPU Bus Units is possible via the CPU bus.

Controller Link

Note A TCP/IP header must be attached to the FINS command for an Ethernet Net-

work, and a Host Link header must be attached to the FINS command for a

Host Link Network

Supports Network Relay

Up to three network levels (eight levels for unit version 2.0 or later), including

the local network, can be bypassed to access other Racks.

FINS command

PLC (Host Link slave)

CX-Programmer or other

Programming Device

that uses CX-Server as

the communications

CPU Bus Unit

Chapters

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