Rockwell Automation 193-EC1_2_3_5, 193-ECPM,592-EC1_2_3_5 E3 and E3 Plus Solid-State Overload Relay User Manual - Manual (Page 216)

216 Rockwell Automation Publication 193-UM002I-EN-P - December 2011
Chapter 12 Troubleshooting
DeviceNet Modes of
Operation The E3 Overload Relay 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 2
seconds, then red for 1/4 second. If autobaud is enabled and the E3
Overload Relay is connected to an active network, the green LED will
continue to flash once the baud rate has been determined. If the E3
Overload Relay is not connected to an active network, this LED will not
continue to flash.
2. Once the baud rate is determined, the E3 Overload Relay 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
E3 Overload Relay 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 E3 Overload Relay 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 E3 Overload
Relay will:
1. Accept messages from a master on the DeviceNet network
2. Send response messages, COS messages, or CYCLIC messages to a master.
If a communication error is detected, the E3 Overload Relay will either enter the
Recoverable Error or Unrecoverable Error Mode.
IMPORTANT The E3 Overload Relay protection functions are still
operational even without an established network
connection.