Trial Run
Troubleshooting 6-4
3 Troubleshooting
Please check the indicators on basic units as error occurs. And do troubleshooting according to
different conditions.
3.1 LED indicator status
M,H type
PWR RUN BAT ERR Description
OFF OFF OFF OFF Power is OFF
Troubleshooting procedure – 2
BLI
NK
ON
ON
OFF ON
Self-diagnosis detects
error that program does
not operate and all I/O
does not work.
Troubleshooting procedure – 1
ON
BLI
NK
OFF OFF Stop mode
Troubleshooting procedure – 3
Input state error:
Troubleshooting procedure – 4
ON ON OFF OFF RUN mode
Output state error:
Troubleshooting procedure – 5
ON ON OFF
BLI
NK
A warn for the program is
logically error. Both
program and I/O still in
working.
Check the logic of user program.
/ troubleshooting procedure – 1
ON ON ON ON Other
Troubleshooting procedure – 1
S type
PWR RUN Description
OFF OFF Power is OFF
Troubleshooting procedure – 2
ON Shine slowly(6.4s)
Self-diagnosis detects
error that program does
not operate and all I/O
does not work.
Troubleshooting procedure – 1
ON Shine quickly(1.6s) Stop mode
Troubleshooting procedure – 3
Input state error:
Troubleshooting procedure – 4
ON ON RUN mode
Output state error:
Troubleshooting procedure – 5
ON ON Other
Troubleshooting procedure – 1
3.2 Presumption of troubleshooting procedure
Such troubleshooting procedure is to resolve abrupt error and recovery method after the
error module was superseded by a good one.
The following conditions are not included:
a． Temporary error caused by noise interference (not successive)
b． Problem caused by faulty program (User application)
3.3 Preparation for troubleshooting
a． Backup the program memory and system memory.
The auxiliary device could not save current program or save the wrong content
sometimes. Please save the latest program and system memory to PC.
Please also save the necessary data to PC as in ROM operation mode.
b． Auxiliary device
Prepare PC / PDA and etc.
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