Visibility Expressions - FactoryTalk View SE

I have a button on my HMI that I only want visible under two conditions. One of them is a numerical value and the other is if a bit is on.

English translation

If Variable 1 = 0 OR BooleanBit is TRUE, then show the button

I tried entering the expression in the button's Visibility parameter in Animation as such:

{[Program]Variable} = 0 OR {[Program]}

However, it does not work on both conditions. It will work if I just use one of them but not as shown above, even if the order is reversed.

There must be a trick of how to write an expression that uses multiple values...... any suggestions?

(VariableTag == 0) OR (BooleanTag == 1)

Thanks! Just another idiosyncracy of FactoryTalk to a newer user!

Actually, that is pretty common... "=" meaning an assignment, and "==" Meaning a comparison.

Hi,

Just a little extra info...you don't actually need to compare the boolean tag. If it's =1 then it's TRUE, so you can just declare the tag.

(VariableTag == 0) OR (BooleanTag)

Regards,

Rob

Good point Kidblue! I'm in the habit of putting the == 1 even on BOOL operators simply for legibility and ease of troubleshooting by maintenance. Makes my phone ring less

But yes, you don't necessarily need it, and if I'm just using one BOOL tag for visibility I don't bother either.