Hello,

How to assign a tag and not the value of a tag to the ProcessValue property by scripting?

My IO field is in input/output mode so this does not work for writing:

item.ProcessValue = Tags("P55001_L_1_PAR.Param_1").Read(); -> just copy the value into Text of ProcessValue

I have tried this but nothing works:

item.ProcessValue = Tags("P55001_L_1_PAR.Param_1");

item.ProcessValue = "P55001_L_1_PAR.Param_1";

item.ProcessValue.Tag = Tags("P55001_L_1_PAR.Param_1");

Thanks.

CSAE_SINECA

How to assign a tag and not the value of a tag to the ProcessValue property by scripting?

My IO field is in input/output mode so this does not work for writing:

item.ProcessValue = Tags("P55001_L_1_PAR.Param_1").Read(); -> just copy the value into Text of ProcessValue

I have tried this but nothing works:

item.ProcessValue = Tags("P55001_L_1_PAR.Param_1");

item.ProcessValue = "P55001_L_1_PAR.Param_1";

item.ProcessValue.Tag = Tags("P55001_L_1_PAR.Param_1");

I don't know any way to do exactly what you want, which is to connect a process value tag to an I/O field at runtime.  However, I do know of two different ways to accomplish your end goal (changing the tag that an I/O field has read/write access to at runtime.

1. Use an indirect tag.  This is an internal WString tag that contains the name of the tag the value should come from/go to.  You can then change the string in the indirect tag (to the name of the tag you want connected to the I/O field) to connect the I/O field to a different tag.

2. Put the I/O field into a faceplate.  Connect it to a faceplate tag.  You can then use a script to change the connection to the faceplate container interface for the faceplate tag at runtime.  See SIMATIC WinCC Unified - Tips and Tricks for Scripting (JavaScript) section 5.5.2.