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Old 05-24-2017
We use Indusoft VBScript at work... its basically the code behind script in all the HMIs we produce.

It could be better, but there isn't much you can't do in it that you need to do. It does a few things like bit level addressing, and you can work around limitations in the HMI package by being able to address global HMI variables by string formatting thier names and passing to a function which allows you to pretend that you have nested classes.. even though it doesn't really support that.

For instance Say I have a Control panel class CP as and I want to have Estop values in it... with fault, description and id fields, the work around is that I generate the tag names as strings to referece them in a for loop.... which you would be able to directly do with nested classes, its a much needed organizational structure that is sadly missing.

CP.ESTOP_Desc_1 ... n
CP.ESTOP_ID_1 ... n
CP.ESTOP_Fault_1 ... n

Interestingly they are intending to transition to Javascript... I'm not sure if that is a good thing or a bad thing :/ At least the HMIs will run on Linux potentially going forward currently they are ball and chained to Windows.
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