Rockwell Automation 193-EDN E1Plus Overload Relays - DeviceNet Module - Manual (Page 42)

Publication 193-UM006A-EN-P – October 2005
5-2 Troubleshooting
DeviceNet Modes of
Operation The E1 Plus DeviceNet Module has four DeviceNet modes of operation:
Power-up Reset Mode, Run Mode, Recoverable Error Mode, and
Unrecoverable Error Mode.
Power-Up Reset Mode
During power-Up Reset Mode, the following occurs:
1. The NETWORK STATUS LED should flash green for approximately
1/4 second, then red for 1/4 second. If autobaud is enabled and the E1
Plus DeviceNet Module is not connected to an active network, this
LED will not continue to flash.
2. Once the baud rate is determined, the E1 Plus DeviceNet Module
performs a duplicate node address check to verify another node is not
assigned to the same DeviceNet node address (MAC ID). If a duplicate
node is detected on the network, the NETWORK STATUS LED turns
solid red, and the E1 Plus DeviceNet Module enters the Recoverable Error
Mode.
If the power-up or reset is successful, the overload relay will enter Run Mode.
Run Mode
In Run Mode, the E1 Plus DeviceNet Module will operate as a slave device to a
master device. The NETWORK STATUS LED will blink green if there are no
network connections established with a network master. When one or more
connections are in the “established” state, the NETWORK STATUS LED will
turn solid green. When one or more connections are in the “timed-out” state,
the NETWORK STATUS LED will blink red. In the Run Mode, the E1 Plus
DeviceNet Module will:
• Accept messages from a master on the DeviceNet network.
• Send response messages, COS messages, or CYCLIC messages to a
master.
If a communication error is detected, the E1 Plus DeviceNet Module will
either enter the Recoverable Error or Unrecoverable Error Mode.
IMPORTANT
The E1 Plus DeviceNet Module protection functions are
still operational even without an established network
connection.