Redundancy communications module, Rcm features – State Industries FANUC GFK-0827 User Manual

Page 30

GFK-0827

Chapter 2 System Components

Redundancy Communications Module

The Redundancy Communications Module (RCM), catalog number IC697RCM711, provides
a communications path for sharing data between the two CPUs in the redundant system.
In a synchronized system, I/O data is controlled by one unit (the active unit) but is shared
between both units (active and backup units). The RCM provides the communications path
between the two units. An RCM must be configured in both the Primary PLC and the
Secondary PLC. The RCM must reside in rack 0 and there can be no empty slot between
the RCM and the CPU (there can be other modules).

RCM Features

The following figure shows the features of the RCM module.

REMOTE SYSTEM

MODULE FUNCTION

ACTIVE

ОО

RCM 711

BOARD OK

LOCAL SYSTEM

READY

ON = TRUE

MODULE
IC697RCM711
LABEL:
44A726758–136R02

EXPANSION

50 FT. MAXIMUM

CABLE LENGTH FROM

BEM 713 TO TO RCM711

ОО

ООООО

ОО

REDUNDANCY

COMMUNICATIONS

MODULE

LOCAL SYSTEM

ACTIVE

REMOTE SYSTEM
READY

MODULE.
HIGH SPEED INTERFACE
BETWEEN HOT.

CONNECT TO END

OF EXPANSION BUS

DEPRESS 1 SEC.

OK
LOCAL READY
LOCAL ACTIVE
REMOTE READY
REMOTE ACTIVE

REDUNDANCY
COMMUNICA TIONS

TO SWITCH ACTIVE
CPU (MIN 10 SECS

BETWEEN SWITCHES)

STANDBY REDUNDANCY
SUPPORTED CPUs.

PORT IN
(TOWARDS CPU)
TO BEM711
OR BEM713
(USE TERMINATED
CABLE CBL811
OR CBL826)

UNUSED PORT

DO NOT INSTALL

CABLE OR

TERMINATOR

a47004

Figure 5. Redundancy Communications Module - IC697RCM711