ProSoft Technology PS69-DPS - Manual (Page 56)

Diagnostics and Troubleshooting PS69-DPS ♦ CompactLogix or MicroLogix Platform
User Manual Profibus DP Slave Communication Module
Page 56 of 108 ProSoft Technology, Inc.
May 9, 2014
4.1 Hardware Diagnostics (LED)
The following section contains the LED diagnostic indications and their meaning
for both the CPU in use and the PS69-DPS module.
4.1.1 CompactLogix
The following table shows the possible LED indications of the CompactLogix
CPU module.
Indicator Color/Status Description
RUN Off No task(s) running; controller in Program mode
Green One or more tasks are running; controller is in the Run mode
FORCE Off No forces enabled
Amber Forces enabled
Amber Flashing One or more input or output addresses have been forced to an On or Off state,
but the forces have not been enabled.
OK Off No power applied
Green Controller OK
Red flashing Recoverable controller fault
Red Non-recoverable controller fault:
Cycle power. The OK LED should change to flashing red.
If LED remains solid red, replace the controller.
I/O Off No activity; no I/O or communications configured
Green Communicating to all devices
Green flashing One or more devices not responding
Red flashing Not communicating to any devices
controller faulted
4.1.2 MicroLogix 1500
To identify problems via possible LED indications of a MicroLogix1500 controller
refer to the MicroLogix1500 User Manuals chapter "Troubleshooting Your
System". Here you will find a detailed description of fault indications and possible
reasons.