Diagnostics and Troubleshooting
PS69-DPS
♦
CompactLogix or MicroLogix Platform
Profibus DP Slave Communication Module
ProSoft Technology, Inc.
Page 47 of 94
January 12, 2009
If there is a problem with the expansion module, the Fault LED will be flashing
red. To diagnose the error, go online with your RSLogix500 project and open up
the processor status dialog. Click the Error tab to view the fault reason.
4.2.3 SYS and COM Status LEDs
This PS69-DPS module has two bicolor status LEDs. They inform the user about
the communication state of the module.
The
SYS
-LED shows the common system status of the card. It may flash
yellow or green.
The
COM
-LED displays the status of the PROFIBUS communication. It can
be solid green or off.
The meaning of the LEDs is described in the booklet of the System Software CD.
If the SYS-LED is solid Green and the COM-LED solid green, the card is in cyclic
data exchange with the Master and the communication is running with outfault.
4.2.4 Error Sources and Reasons
This section describes typical problems, error sources and questions that come
up while commissioning the PROFIBUS-DP Slave module PS69-DPS. The
following table summarizes the typical error sources and gives a hint of possible
reasons for the problem.
Behavior Significance
Typical
Reason
Help
CompactLogix
I/O LED is flashing Green
No communication with the
PS69 module (or other
modules)
Modules slot number in
RSLogix program does not
match with the physical slot
of the module
Configured Input / Output /
Configuration array size is
wrong
Check modules slot number
in RSLogix project
Compare configured Input /
Output size with required
values
MicroLogix
Fault LED is flashing Red
No communication with the
PS69 module (or other
modules)
Modules slot number in
RSLogix program does not
match with the physical slot
of the module
Configured Vendor ID /
Module ID / Input / Output /
Configuration array size is
wrong
Check modules slot number
in RSLogix project
Compare configured Input /
Output size / Vendor ID
/Module ID with required
values
Configuration missing or
faulty
No configuration or faulty
stored
Check initialization values of
the configuration array
Check the value "LastError"
in SlaveStatusField to
determine the error reason
PS69-DPS
COM LED is off SYS LED
Flashing irregular green
Watchdog expired
Watchdog value in
configuration is smaller then
RPI (Requested
PackedIntervall)
Increase Watchdog value in
configuration array
Module has to be reset
