Omron SYSMAC CS Series Operation Manual page 257

Errors and Alarm Troubleshooting
LED Indicators LED
on front of Indicator
Loop on front of
Controller CPU Unit
RDY EXEC ERR/ALM
(See note.)
Not lit Not lit Flashing
(A42404,
the Incom-
patible CPU
Unit Error
Flag, is
ON.)
Not lit Not lit Lit
(A42401,
the Inner
Board Bus
Error Flag,
is ON.)
Problem Cause
Incompati- • The CS1W-LCB01/
ble CPU 05 Loop Control
Unit Board is not mounted
under one of the fol-
lowing CPU Units:
CS1G-CPU@@H
CS1H-CPU@@H
• The Process-control
CPU Unit (CS1D-
CPU@@P) Loop
Controller is not
mounted under a
CS1D-CPU@@H
CPU Unit.
All the EM banks have
been converted into file
memory.
Inner An Inner Board Bus
Board Bus Error has occurred.
Error
Status Error
code
(Stored
in error
log.)
Operation is None
stopped.
Operation is None
stopped.
Section 7-1
Corrective action
Replace the CPU Unit with
one of the compatible models.
Change the setting so that the
EM banks are not converted
into file memory.
Mount the Loop Control Board
securely. Replace the Loop
Control Board if the error
recurs after the Board is
secured and power is turned
ON again. If the error occurs
with the Loop Controller com-
ponent of a Loop-control CPU
Unit, replace the entire Loop-
control CPU Unit.
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