Applies To:
  • CitectSCADA 5.xx

The error message " Error 0x22 on opening 'PORTx_BOARDx' " appears as Citect is starting up. 

This error is indicative of the fact that, at least for some drivers, the polltime was set to 0 and no interrupt was specified. Drivers have to be either polled or interrupt driven and thus at least one of these options must be specified.

The solution is to either specify an interrupt in the 'boards' form or set the polltime in the "Citect.ini" file.