Why do the 0 to 10 V analog outputs of the PCD3.W800 cards 'freeze' to a random value during operation and cannot be controlled by the user program?

FAQ #102028

It may happen that the 0..10V analog outputs of the PCD3.W800 cards 'freeze' to a random value during operation and cannot be controlled by the user program.

We are currently analyzing the trigger for freezing the analog outputs of the PCD3.W800 module so that we can inform you if your application is affected by the problem.

This FAQ will be dated as soon as we have new information.

Affected cards:

PCD3.W800 cards manufactured between 1801 and 1834. 

The manufacturing date is marked on the white sticker on the right side of the PCD3.W800 module.

Behavior:

At any time the analog outputs of the affected PCD3.W800 cards can 'freeze' at any value between 0 and 10V and it is no longer possible to change the analog output from the user program.

The manual operation of the analog outputs 0 to 2 still works with the manual switch and the corresponding potentiometer.

The malfunction occurs regardless of whether the PCD3.W800 module has been configured with FBoxes in the PG5 user program or with the PG5 device configurator.

Solution:

If one of the analog outputs of the PCD3.W800 module freezes, the 24VDC power supply of the PCD3 must be switched off and on again. 

After that the control of the analog outputs of the PCD3.W800 works normally again.

For critical applications where this malfunction can cause considerable damage, we recommend either:

  • the exchange of the affected PCD3.W800 modules with new modules (manufacturing date 1835 or newer)
  • the use of another 0..10 V analog output module such as PCD3.W500, PCD3.W600 or PCD3.W605.

To replace the affected modules:

Order the desired number of PCD3.W800 modules or the other PCD3 analog output modules from SBC and send the affected modules back to SBC via RMA.

In the RMA form, note 'Advance exchange' with the remark '8D-SBC-18-027'.

The affected PCD3.W800 modules will then be credited to you.

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PCD3 / Wxxx

Last update: 21.12.2018 17:02

First release: 21.12.2018 16:52

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.

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