Omron C200HW-PRM21 Operation Manuals page 102

Troubleshooting
Configuration problems (continued)
Description
READY LED is The Master Unit is faulty.
flashing
ERR LED is ON A fatal error is detected. The cause is reported
in IR n+2.06 ~ IR n+2.08
I/O data communication problems
Description
COMM LED is OFF The wiring is not correct.
The network has not been terminated correctly.
Configuration is not correct.
The DP-communication is inhibited. The control
bit IR n.01 of the control words is set.
The Master Unit is faulty
86
Possible cause
Possible cause
Possible remedy
Try to restart the Unit and do another
download. If this does not work, replace the
Unit.
Try to solve the cause and / or restart the
Unit. If this does not help, replace the Unit
Possible remedy
Check IR n+3 to find out where / what the
possible problem is.
Check if the correct pins of the BUS connector
are connected, if there are no short circuits, if
the stub-lines are not too long.
Terminate the network at the appropriate
places (see section 2-3-1).
Check IR n+3 to find out where / what the
possible problem is.
Check if the DP-slaves have the same station
address as in the configuration.
Check if no station address is used twice.
Check that all masters in the same network
have been configured to the same baud rate.
Check if the correct GSD-files are being used.
Check that the bus parameters have the
correct value. It is recommended to use the
default bus parameters (e.g. HSA must be
greater or equal to the highest master node
address in the network).
After changing the configuration, download
the configuration to the respective Master
Unit.
Reset the control bit IR n.01
Replace the Master Unit.
Section 7-2