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Use Didjuntions Operators with Point Type Digital

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Hi everyone.

 

I´m triying to configure a PE using 3 tags, which are configurated as Digital In Point Type. The problem is that I´m not able to use disjuntions Operators with this kind of Tags in this way:

 

Equation= 'PE_pru' OR 'PE_pru2' OR 'PE_pru3'

 

This message returned by SMT.

 

Error -2147219650: PI PE syntax error in Expression. [-12315] Performance Equation: Function has bad argument data type.

 

The PE is possible to be configurated as whatever type.

 

The question if there is a function capable to convert Digital Name in an integer or similar in order to be able to use Logical operators or if there is other option to carry out the logical equation.

 

Thanks in Advance.


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