Combining Multiple Bool Status Tags into Single Tag

Ignition
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1

What is the most efficient method to combine multiple bool status tags into a single tag to drive a perspective motor SVG state change?

For example, I have a Motor with a separate Fault Tag, Run Tag, and Stopped Tag that all needs to drive the state change on the motor svg symbol in perspective.

2

Use the binEnc expression function.
e.g.

binEnc({stopped}, {running}, {faulted})

This will produce a binary encoded value which you can decipher in a case statement:

case(binEnc({stopped}, {running}, {faulted})
	,1, 'Stopped'
	,2, 'Running'
	,4, 'Faulted' 
	,5, 'Faulted'
	,6, 'Faulted'
	, 'Invalid'
)
4 Likes
3

How is this for multiple tags?

4

You need to explain what you require. In general, it would be,

case(binEnc({tagPath1}, {tagPath2}, {tagPath3})
	,1, 'Stopped'
	,2, 'Running'
	,4, 'Faulted' 
	,5, 'Faulted'
	,6, 'Faulted'
	, 'Invalid'
)
1 Like
5

Wished I'd stumbled across this 2 years ago. I do it old school with an expression:

State = fwd + 10*rev + 20*fault

Then my style customer has values of

0 (stopped), 1(Running fwd), 10 ?Running rev), 20 (fault)

Code enforces that there’s never possibility of 11, 21, etc, but even then I’ll style Invald for those possibilities.