Allen-Bradley 193-DNENCAT, User Manual, Page: 87 / 112

Rockwell Automation Publication 193-UM014C-EN-P - August 2016 87
Troubleshooting Chapter 10
3. The EtherNet/IP communication auxiliary module performs a
duplicate media access control (MAC) address check to verify that
another module is not assigned to the same MAC address. If a duplicate
MAC address is detected on the DeviceNet network, the DeviceNet NS
status indicator illuminates a solid red, the MS status indicator flashes
red, and the EtherNet/IP communication auxiliary module enters the
Recoverable Error mode.
4. If the power-up or reset is successful, the overload relay enters into Run
mode.
Run Mode
In Run mode, the EtherNet/IP communication auxiliary module does the
following:
• operates as a slave device to a master device on an EtherNet/IP network.
• operates as a master device and scans up to six slave devices on a
DeviceNet network.
• accepts messages from a master on the EtherNet/IP network.
• sends response messages, COS messages, or CYCLIC messages to a
master.
• supports a Device Level Ring (DLR) for catalog number
193-DNENCATR.
If a communication error is detected, the EtherNet/IP communication
auxiliary module either enters the Recoverable Error mode or Unrecoverable
Error mode.
Operating as a Slave Device to a Master Device
As stated, the EtherNet/IP communication auxiliary module operates as a slave
device to a master device on an EtherNet/IP network in Run mode. The
EtherNet/IP NS LED flashes green if there are no network connections
established with an EtherNet/IP network master. When one or more
connections are in the “established’ state, the EtherNet/IP NS LED illuminates
a solid green. When one or more connections are in the “timed out” state, the
EtherNet/IP NS flashes red.
Operating as a Master Device
As stated, the EtherNet/IP communication auxiliary module also operates as a
master device and scans up to six slave devices on a DeviceNet network in Run
Mode. The DeviceNet NS LED flashes green if there are no connections
established with a DeviceNet slave device. When one or more connections are
in the “established” state, the DeviceNet NS LED illuminates a solid green.
When one or more connections are in the “timed out” state, the DeviceNet NS
LED flashes red. If no slave devices are defined in the DeviceNet scan list, the
MS LED flashes red.