Why does my PCD7.F7500 not work on my PCD2.M5540?

FAQ #101655

 

Symptom
The Profibus Master module PCD7.F7500 does not work while commissioning. During start-up of the PCD the Error LED is lit and in the history the message "PROF DP FAIL 000" is added (see screenshot from a diagnostic file below):

Reason
In some specific cases the PCD2.M5540 does not detect the PCD7.F7500. As result, the module can not be configured and the Error LED of the PCD is lit.
The PCD2.M5540 hardware version C with modification 3,5,6 contains a modification of the CPLD which assures that the module PCD7.F7500 it detected correctly.

Solution
Please use the PCD7.F7500 module wiith a PCD2.M5540 with the hardware version/modification "C 3,5,6". In case you are concerned by this case and your PCD has an older version (e.g. modifications "3,4,5"), please send the PCD to the repair service with the comment:

Please update to Hardware Version / Modification "C 3,5,6" as described in KR-PC-11-013

Remarks

• If the PCD2.M5540 is running with a PCD7.F7500 there is no need updating the hardware, even if the modification above is not applied (because the problem does only occur on some combinations of CPU and F-module
• Since May 2011 the PCD2.M5540 delivered by Saia-Burgess Controls AG have the modification 6 or later applied
• When returning a PCD2.M5 keep the PCD7.F7500 mounted if possible; otherwise remove it very carefully. The module could be damagede due to mechanical stress during the removal.