Omron CJ Series User Manual

7 Troubleshooting and Maintenance
7-4
CJ-series PROFIBUS Master Unit Operation Manual for NJ-series CPU Unit (W509)
Note If startup errors prevent the Unit from functioning correctly, the PRM, BST and BF indicators
will remain OFF.
Unit Operational errors are errors which can occur during normal operation, i.e. after normal startup.
The error determination procedure uses the table below. To determine the error, first find the status
of the RUN indicator (left column). Then move one column to the right and find the status of the ERH
indicator. Then move again one column to the right and find the status of the ERC indicator. The
probable error causes are listed to the right of the third column.
RUN ERH ERC Probable Cause Correction
Not lit Not lit Not lit Power is not being supplied to the
CPU Unit or the power supply voltage
is too low.
Supply power. Make sure that the cor-
rect voltage is being supplied.
The CPU Unit is faulty. Replace the CPU Unit.
The sliders are not properly locked
into place.
Lock the sliders into place .
The PROFIBUS Master Unit is faulty. Replace the PROFIBUS Master Unit.
Lit The PROFIBUS Master Unit is faulty
(COMM indicator is also flashing).
Replace the PROFIBUS Master Unit.
Lit Not lit The I/O tables are not registered in
the CPU Unit.
Register the I/O tables.
The same unit number is being used
on another Unit as well.
Correct the unit number. Make sure
that all unit numbers used in the sys-
tem are unique.
The CPU Unit is faulty. Restart the CPU Unit. If the problem
persists, replace the CPU Unit.
Lit Not a valid combination at startup.
Lit Not lit Not lit Unit is functionally correct. If there are still problems, check on the other indi-
cators.
Lit During startup the checksum of the
Error Log stored in non-volatile mem-
ory was found to be corrupted.
Send a ERROR LOG CLEAR com-
mand to the Unit.
Restart the Unit.
During startup the checksum of the
Parameter sets stored in non-volatile
memory was found to be corrupted.
Re-download the Parameter sets
from CX-ConfiguratorFDT.
If the problem persists, replace the
PROFIBUS Master Unit.
During startup the Parameter set
stored in non-volatile memory was
correct, but the contents contains
errors preventing the PROFIBUS
interface to be initialized correctly.
Check the Parameter set in CX-Con-
figuratorFDT and re-download the
Parameter sets from CX-Configura-
torFDT.
If the problem persists, replace the
PROFIBUS Master Unit.
Lit --- There is an error in the CPU Bus Unit
Setup or routing tables.
Read the error history and correct the
data that is causing the error. If the
problem persists, replace the CPU
Unit.
Memory in the CPU Unit is faulty. Restart the CPU Unit. If the problem
persists, replace the CPU Unit.
The CPU Unit is faulty. Restart the CPU Unit. If the problem
persists, replace the CPU Unit.
A Fatal error occurred in the CPU
system.
Verify that the CPU and all Units are
working correctly. Restart the CPU
Unit. If the problem persists, replace
the CPU Unit.
7-2-3 Unit Operational Errors

Omron CJ Series Specifications

General

Brand	Omron
Model	CJ Series
Category	Controller
Language	English