Omron DRT2 SERIES DEVICENET SLAVES - OPERATION MANUAL 04-2008 Operation Manual page 480

Troubleshooting
The NS indicator continues to
flash green.
The NS indicator alternates
between being a constant green
and flashing green OR
The NS indicator alternates
between flashing red and flash-
ing green
Check that the Master is operating properly.
When using an OMRON Master Unit, refer to the Master Unit's Operation Manual.
If another company's Master is being used, refer to the relevant operation manual.
Check whether the Slave is registered in the Master's scan list.
If an OMRON Master Unit is being used, a new Slave cannot be added to the network if
the Master is operating with the scan list enabled.
First clear the scan list, check that all the Slaves have joined the network, and then cre-
ate the scan list.
If another company's Master is being used, refer to the relevant operation manual for
details on registering a new Slave in its scan list.
When using an OMRON Master Unit, check the following points and perform the error
processing steps according to the indicator status.
Register the scan list again.
First clear the scan list, check that all the Slaves have joined the network, and then cre-
ate the scan list.
Check that the Slave's allocated I/O Area does not overlap with that of another Slave. If
there is an overlap, change the Slave's node address to eliminate the overlap.
Check that the allocated I/O Area does not exceed the allowable range shown below. If
the I/O Area exceeds this range, change the Slave's node address to correct the prob-
lem.
When using another company's Master Unit, check that the I/O size registered in the
Master's scan list matches the actual I/O size of the Slave.
The I/O size is recorded in the following attributes of the Connection Object:
Interface 2 (Polled I/O Connection)
Interface 4 (COS/cyclic Connection)
Produced Connection Size (input size)
Consumed Connection Size (output size)
and:
Interface 3 (Bit-strobed I/O Connection)
Produced Connection Size (input size)
Refer to Appendix B Using Another Company's Master Unit, and register the correct
values in the Master Unit's scan list.
Refer to the Master Unit's operation manual for details on registering values.
Section 9-2
459