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 222)

222 Rockwell Automation Publication 193-UM002I-EN-P - December 2011
Chapter 12 Troubleshooting
DeviceNet
Troubleshooting
Procedures The following table identifies possible causes and corrective actions when
troubleshooting DeviceNet related failures using the
NETWORK STATUS
LED.
Loss of Node Address
Refer to DeviceNet™ Node Commissioning on page 95 for further information
regarding node commissioning.
Input and Output
Troubleshooting
Procedures
Table 14: DeviceNet Troubleshooting Procedures
Color State Possible Cause Corrective Action
None 1. The E3 Overload Relay is not receiving power at the
DeviceNet connector.
1. Check DeviceNet power and cable connections
and the power connection on the DeviceNet
connector.
Green
Red
Off Flashing 1. The E3 or E3 Plus Overload Relay is trying to determine
the network baud rate
1. The overload relay can not determine the network
baud rate if no network traffic exists. Network
traffic can be induced by invoking a Network Who
using DeviceNet Manager.
Green Flashing 1. Overload Relay is on-line but not allocated to a master. 1. Check DeviceNet master and its scan list for
correct scanner configuration.
Green Solid 1. Normal operating state, and the E3 Overload Relay is
allocated to a master.
1. No action required.
Red Flashing 1. I/O connection timed-out 1. Reset DeviceNet master device.
Red Solid 1. Diagnostics test failed on power-up/reset. Internal fault
exists.
2. Duplicate DeviceNet node address exists (two
DeviceNet nodes cannot have the same address).
3. Invalid baud rate (if autobaud is disabled).
1. Cycle power to the unit and network. If the fault
still exists, replace unit.
2. Change the value of Parameter 57, NonVol MAC ID,
to a valid address and reset the device.
3. This will only occur if Parameter 55,
AutoBaudEnable, is set to “disabled”. Set Parameter
55 to “enabled” and reset the E3 Overload Relay
(or) set Parameter 56, NonVol Baud Rate, to the
correct setting and reset the E3 Overload Relay.
ATTENTION: If the outputs are to be commanded via an
explicit message, ensure that there can never be an
established I/O connection that can actively control
them, and that the explicit message connection has a
non-zero expected packet rate (EPR) setting.