Issue
You have created a custom CAT and the HMI does not display any values just greyed out, however the buttons seem to function.
In the following example we have a CAT called MyValve which has a single Input called OpenCmd and 2 outputs OpenFb and CloseFb. The idea being that you set the OpenCmd on and the OpenFb will be set true. OpenCmd can either be set by an input Interface or via the HMI.
The HMI is greyed out and the button can be operated, however nothing is displayed.
Resolution
Open the Instance that was created from MyValve and place a Watch on the IThis function block.
Notice that the Status displays “FB not initialised “, this means that the block has not started communicating and is controlled by the Input QI. Set the Input QI to true and reinitialise. This will start the communication.
The Status display will change to “
Return to the HMI and the values will now be displayed.
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Disclaimer
The views and opinions expressed in this article are those of the author(s) and do not necessarily reflect the official policy or position of Schneider Electric.
