Applies To:
  • CitectSCADA 5.xx, 6.00
  • CitectHMI 5.xx, 6.00

I see a nuisance hardware alarm for my ABCLX device every time I start Citect, but the hardware alarm becomes inactive after 30 seconds or so. 

The reason why the hardware alarm appears is because hardware alarms in Citect are generated whenever Init Unit fails. In the case of ABCLX this can occur because all the tags have not been downloaded yet, or because the tags have not completed subscription. Please refer to KB article Q4001 for more information in this regard.

As a result, there is no current workaround or solution for this hardware alarm, however it should be noted that the driver comes online and communication between Citect and the PLC takes place very quickly depending on network bandwidth, PLC CPU utilisation, the number of tags and the number of bad tags.

Citect has confirmed this to be a problem in CitectHMI/SCADA version 5.XX to 6.00. We are researching this problem and will post new information here as it becomes available.