Omron DEVICENET#05-2003 Operation Manual page 211

Troubleshooting
Error
The NS indicator continues to flash green.
The NS indicator alternates between being
green and flashing green, or alternates between
flashing red and flashing green.
• Make sure that the Master is operating properly.
When using an OMRON Master, refer to the DeviceNet Operation
Manual (W267).
When using another company's Master Unit, refer to that Master's
user's 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 perform the clear scan list operation, check that the
Slave has joined the network, and then perform the create scan list
operation.
If another company's Master Unit is being used, refer to that Master's
user's manual for details on adding a new Slave to its scan list.
• When using an OMRON Master, check the following items and per-
form the necessary error processing steps.
Register the scan list again.
(After performing the clear scan list operation, check that the Slave
has joined the network and perform the create scan list operation.)
Make sure that the Slave's allocated I/O area doesn't overlap with
that of another Slave. If there is an overlap, change the Slave's
node number to eliminate it.
Make sure that the allocated I/O area doesn't exceed the allowed
range shown below:
C200HW-DRM21-V1
If the I/O area exceeds this range, change the Slave's node num-
ber to correct the problem.
• 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)
Produced Connection size (Input size)
Consumed Connection size (Output size)
and:
Interface 3 (Bit strobed I/O Connection)
Produced Connection size (Input size)
See Appendix C Multi-vendor Usage for details and record the correct
value in the Master's scan list. Refer to the Master's manual for details
on registering the values.
Probable cause
Output: IR 050 to IR 099
Input: IR 350 to IR 399
Section 7-2
203