225
Errors and Alarm Troubleshooting Section 7-1
Not lit Not lit Flashing
(A42404,
the Incom-
patible CPU
Unit Error
Flag, is
ON.)
Incompati-
ble CPU
Unit
• The CS1W-LCB01/
05 Loop Control
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.
Operation is
stopped.
None Replace the CPU Unit with
one of the compatible models.
All the EM banks have
been converted into file
memory.
Change the setting so that the
EM banks are not converted
into file memory.
Not lit Not lit Lit
(A42401,
the Inner
Board Bus
Error Flag,
is ON.)
Inner
Board Bus
Error
An Inner Board Bus
Error has occurred.
Operation is
stopped.
None 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.
LED Indicators
on front of
Loop
Controller
LED
Indicator
on front of
CPU Unit
Problem Cause Status Error
code
(Stored
in error
log.)
Corrective action
RDY EXEC ERR/ALM
(See note.)
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