test channel for "invalid state

[momentaryracing]

Channel A sets value to invalid() on a condition

Channel B needs to set itself to a value IF A is invalid

Code: Select all

choose('B' == invalid(), somevalue, ...)

does not work (understandably)

Is there another way?

I2Pro, analysis only

[David Ferguson]

How about breaking the expression that makes Channel A return invalid() into it's own math channel?

Then you can use it both in A to make some of it's data invalid, and you can use the inverse case (using choose) to determine the value for Channel B.