Which products are affected?
Software Package Positioner V3.1
Positioner template
What happens?
A QSP request out of the user program in an interval task is interrupted cyclically for a short period of time. The display in the visualisation changes between red and green. The short-term interruption of quick stop the may be observed or even heard.
When does the problem occur?
A quick stop request via QSP button in the template visualisation is cyclically overwritten out of the user program by g_bUserQuickStop = FALSE. This happens only if the button in the template visualisation (in this case QSP -> ON) is activated. In the visualisation mode it is not possible to write to g_bUserQuickstop unless the button is activated/deactivated.
Possible diagnostics?
The interruption of the QSP request is most evident if g_bUserQuickstop is written in very long time intervals and the QSP request is activated permanently in the meantime via the visualisation. In this case the colour of the QSP status display changes between red and green which can clearly be observed in the visualisation.
Short-term measures/recommendations?
If the g_bUserQuickstop variable is used in the user program the QSP function cannot be activated/deactivated via the template visualisation.
Evaluation:
The operation of the machine via the visualisation only serves for demonstration purposes and may be used during commissioning. Thus the problem described before does not occur. In the daily production routine of a machine this deficiency does not occur.
