Why are the inputs and outputs of a PCD3 systems not switched on and off correctly, or switched on and off randomly, or the I/O status not detected correctly in the PLC?

FAQ #102063

The problem may be related to a loose contact on the PCD3.K010 connectors used to connect the PCD3.M/Txxx CPU's and the PCD3.Cxxx expansion modules.

In this case, various error patterns may occur, such as

  • - If an input is set to 1, then several inputs are set to 1 at the same time.
  • - If an output is set to 1 in the application program, then the output is not set on the output module.
  • - The status of the inputs is not correctly recognised in the application program.


The affected PCD3.K010 modules have a manufacturing date of 2028 (year 2020, week 28).


If the symptoms described above occur and a PCD3.K010 module with fabrication date 2028 is used, replace the PCD3.K010 module with a new PCD3.K010 module.

Order new PCD3.K010 modules and create an RMA request with the error description and the remark: CRABBMS-430 and select the option 'Advanced replacement'.

The date of manufacture can be seen on the white sticker on the PCD3.K010.


PCD3 / Axxx

PCD3 / Bxxx

PCD3 / Cxxx

PCD3 / Exxx

PCD3 / Hxxx

PCD3 / Kxxx

PCD3 / Mxxx

PCD3 / Txxx

PCD3 / Wxxx

PCD3 / Fxxx

Last update: 10.01.2023 14:35

First release: 10.01.2023 14:35

Views: 2

The requested software / document is no longer marketed by Saia-Burgess Controls AG and without technical support. It is an older software version which can be operated only on certain now no longer commercially available products.