Omron C500-LDP01-V1, Operation Manual

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6-1 Error Messages and Troubleshooting
Error Possible Cause Correction
Indicators do not light PC power is OFF Apply power to PC
Unit is not mounted securely Mount Unit and tighten mounting
screws
Indicator 4 lights during PROGRAM or
MONITOR when SW 3 is set to 0
(GPC/FIT/LSS connection error) GPC/FIT/LSS power is OFF Apply power to the GPC/FIT/LSS
Cable to GPC/FIT/LSS is
disconnected Reconnect the cable properly and
secure with screws
Broken cable or poor contact to
GPC/FIT/LSS Repair or replace the cable
Indicator 4 lights during RUN or
MONITOR mode when SW 3 is set to
0 (operation continues) JMP(04) and JME(05) are not used in
pairs Rewrite the program to use JMP(04)
and JME(05) in pairs
Clock data read error Reset clock data in PROGRAM mode
Fatal Errors If an error occurs that stops the Unit, the indicator indicated in the following table
will flash regardless of the setting of SW 3. Possible errors vary depending on
which indicator flashes.
Indicator Error Possible Cause Correction
0 Incorrect RAM (verified when
power is connected or at reset
time) Failed RAM Replace Unit
Incorrect EEPROM write Unable to write program to Unit Replace Unit
Pin 1, 6, 7, or 8 set incorrectly Pin 1, 6, 7, or 8 set to ON Turn OFF pins 1, 6, 7, and 8
1 Program error Program within Unit has been
corrupted Rewrite program. If error persists,
replace Unit. Transfer data to the
entire user program area. If
transmission is interrupted after
sending END(01), the write will be
invalid; always write completely to
end of program memory area.
2 No END instruction END(01) is missing in program Insert END(01) and retransfer the
program
3 Clock data write error Incorrect clock data written to
DM 60 DM to 63 Write correct clock data
4 Program conversion error Program contains an instruction
which cannot be used in the Unit Review program
Program is too long and cannot
be written to the Unit
5 Too many jumps Program contains 10 or more
JMP(04) instructions Reduce jumps to 9 or less
6 Too many DIFU(13)/DIFD(14)s Program contains 17 or more
DIFU(13)/DIFD(14)s Reduce DIFU(13)/DIFD(14)s to
16 or less
7 CPU error Watchdog timer error has
occurred Review and correct program to
limit scan time to 100 ms
maximum
* ( ).
Section 6-1