Mitsubishi Electric MELSEC iQ-R Series Programming Manual page 1193

Control mode
CMB (COMPUTER MANUAL BACK UP)
CAB (COMPUTER AUTOMATIC BACK UP)
CCB (COMPUTER CASCADE BACK UP)
LCM (LOCAL MANIPULATED)
LCA (LOCAL AUTOMATIC)
LCC (LOCAL CASCADE)
Description
Manual operation backup when the host computer is
abnormal
Automatic operation backup performed when the host
computer is abnormal
Cascade operation backup performed when the host
computer is abnormal
Local manual operation
Local automatic operation
Local cascade operation
Application
When the computer fails during loop control by
the host computer, backup is performed by the
predetermined operator station.
When the plant is started, the operation and
start-up are performed by using equipment such
as the machine side operation panel away from
the operator station, and the control mode is
monitored at the operator station.
11 PROCESS CONTROL INSTRUCTIONS
11.1 Overview
11
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