Rockwell Automation 1756-DNB ControlLogix DeviceNet Scanner Module Installation Instructions - Manual (Page 34)

34 ControlLogix DeviceNet Scanner Module
Publication 1756-IN566D-EN-P - June 2008
91 Bus-off condition likely due to cable
or signal errors.
• Cycle power to the device.
• Verify that all devices are set to the
same communication rate.
• Check DeviceNet cabling to make
sure no short circuits exist between
CAN (blue and white) wires and
power or shield (black, red, and
shield) wires.
• Check the media system for the
following noise sources.
– Device located near high-voltage
power cable.
– Incorrect or no termination
resistor used.
– Improper grounding.
– Device on network producing
noise or incorrect data for the
network.
92 DeviceNet cable not supplying
power to the device’s
communication port. • Verify the network’s 24V DC power
supply is operating properly.
• Verify good cable condition.
• Check cable connections to the
device.
95 A device’s firmware is being
updated or a configuration is being
downloaded. None. Do not disconnect the device while
the update is in process because existing
data in device memory will be lost.
96 Communication port is in test mode. None.
DeviceNet Status Codes
Status
Code Description of Status Recommended Action