Omron C200HW-PRM21 Operation Manuals page 101

Troubleshooting
Start-up problems
Description
No LEDs are ON or The PLC's power is OFF
Flashing
The Master Unit is faulty.
The RUN LED is The same unit number has been set on
Flashing another Special I/O Unit, causing an I/O UNIT
OVER error in the PLC.
I/O table verification error. A Unit has been
removed or the Unit number setting has been
changed that caused an I/O SET ERR error in
the PLC.
A Special I/O Unit or Interrupt Input Unit has
not been initialised, causing an CPU WAIT'G
error in the PLC.
The Master Unit is faulty
The DP-ERR LED Wrong configuration data is present in the Unit.
is ON and the RUN The Unit waits for a configuration to be
LED is Flashing downloaded.
The Master Unit is faulty.
ERR LED is ON A fatal error is detected. The cause is reported
in IR n+2.06 ~ IR n+2.08
Configuration problems
Description
Downloaded a Configuration is incorrect. IR n+2.03 is ON.
configuration, but
the DP-ERR LED is
flashing.
DP-ERR LED is ON Erroneous configuration data is present in the
and the READY Unit. The Unit waits for a configuration to be
LED is flashing downloaded
Configurator does Faulty RS-232C connection.
not download the
configuration.
COM-port driver not set up or wrong COM-port
configured.
Possible cause
Possible cause
Possible remedy
Turn the PLC's power supply ON.
Replace the Master Unit.
Make sure that the same unit number is not
used by more than one Special I/O Unit and
restart the PLC.
Verify the I/O table and/or register the I/O
table again.
Check and/or remove the faulty Unit.
Replace the Master Unit.
Download a configuration.
Replace the Master Unit.
Try to solve the cause and / or restart the
Unit. If this does not help, replace the Master
Unit
Possible remedy
Check IR n+3 to find out where / what the
possible problem is.
Check if the configuration corresponds to the
actual network configuration. Do the DP-
slaves have the same station addresses as in
the configuration? Are the correct GSD-files
being used?
If all is correct, try to download it again. If the
error remains, try to find out what is going on
with the configurator debugger.
Download a configuration.
Check if the connection between the
computer and the Master Unit is correct.
Check if the cable is connected to the
configured COM-port.
Check if the driver is configured to the correct
COM-port.
Section 7-2
85