Rockwell Automation 160 DEVICENET (DN1) MODULE FRN 1-2.XX - Manual (Page 56)

Publication 0160-5.5 - September 1997
Chapter
7
Troubleshooting
The purpose of this chapter is to help you troubleshoot your
DeviceNet Communication Module using the LEDs on the front of
the device.
Figure 7.1
Module Front View
!
ATTENTION: Servicing energized industrial control
equipment can be hazardous. Electrical shock, burns, or
unintentional actuation of controlled industrial
equipment may cause death or serious injury. Follow
the safety-related practices of NPFA 70E, Electrical
Safety for Employee Workplaces, when working on or
near energized equipment. Do not work alone on
energized equipment.
COMM LED - Bi-colored LED (red/green) provides status information on
DeviceNet communications. The table below summarizes the operation of the
LED.
Important: When power-up occurs, the communication status LED
(COMM), flashes green for 1/4 second, red for 1/4 second, and then goes
blank while the Communication Module finishes its initialization.
COMM LED
Description
Color State
None No DeviceNet power or initializing.
Red Solid Unrecoverable fault.
Red Flashing I/O connection has timed out.
Green Solid Normal operating state.
Device is allocated to a master.
Green Flashing Device is on-line but not allocated to a
master.
READY LED - Green when drive is powered up.
FAULT LED - Red when drive is faulted
Off when drive not faulted.