Rockwell Automation 193-EC4 EC4 Current Monitoring Relay User Manual - Manual (Page 113)

114 Rockwell Automation Publication 193-UM011A-EN-P - September 2010
Chapter 11 Troubleshooting
If the power-up or reset is successful, the current monitoring relay will enter Run
Mode.
Run Mode
In Run Mode, the EC4 Current Monitoring 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 EC4 Current
Monitoring 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 EC4 Current Monitoring Relay will
either enter the
Recoverable Error or Unrecoverable Error Mode.
Recoverable Error Mode
In Recoverable Error Mode, the EC4 Current Monitoring Relay’s NETWORK
STATUS LED turns solid red. The current monitoring relays will respond to
messages that are specified in offline node recovery message protocol.
Unrecoverable Error Mode
In Unrecoverable Error Mode, the EC4 Current Monitoring Relay’s
NETWORK STATUS LED turns solid red. The current monitoring relay
continues in this state as long as the device is powered.
Error Type Description LED State
Recoverable Duplicate node address detected Solid Red
Error Type Description LED State
Unrecoverable Power-up initialization failure Solid Red
Incorrect baud rate
Fatal communication error (bus-off)