Why can't I connect a PCD3.M5xx0 over the serial PGU port?

FAQ #100737

 

Symptom
It is not possible going online with the PGU communication mode using a PCD8.K111 programming cable plugged in on the D-SUB labeled "Com/PGU" of a PCD3.M5xx0.

 

Reason
The port "Com/PGU" of the PCD3.M5xx0 can be used as either PGU port for programming the PCD or for connecting an external modem to the PCD3. In case a modem is connected, the full handshake must be enabled and by doing so the detection mechanism for a PGU connection established with a PCD8.K111 is disabled.
A second reason could be that the firmware 039 is installed on the PCD3. In this case a firmware problem avoids a successful serial PGU connection.

Solution
Connect to the PCD using a USB cable (which always works as programming connection) and upload the current hardware settings of your PCD3.
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After having uploaded the current configuration of the PCD3, check that the checkbox "Full RS232-handshaking on Port 0" is not checked. If it is checked, uncheck it and download the modified hardware configuration in order beeing able going online with a "serial PGU" connection.

If it is still not possible going online with the PCD3, please check the firmware version of the PCD3. Note that the version 039 has a known problem that avoids going online over the Serial PGU connection. In case you are concerned by this problem, please contact your local sales office and request a firmware that fixes this problem (e.g. 03A).