6. IN CASE OF TROUBLE
IMSRM02-E6
69
(4) DI module related
Problem
Probable cause
Solution
RUN lamp does not flash
Power line defect
Replace mother block
Power supply section defect
Replace PCP module
CPU section breakdown
Replace module
RUN lamp stays lit
Module different from system
specifications inserted
Replace with module matching
specifications
Maximum number of linkable
units exceeded
Eliminate a module
FAIL lamp lit up
CPU section breakdown
Replace module
No digital input change
System set to
Unused
mode
Switch to
Used
mode
Main CPU section breakdown
Replace PCP module
Bus line defect
Replace mother block
Specific digital input does not
Terminal improperly tightened
Retighten
change
System set to
Unused
mode
Switch to
Used
mode
Input circuit, CPU breakdown
Replace module
Error from certain module on
Head mother block defect in
error module
Replace mother block
Module connections disconnected Check connections
