WinCC TIA 14 Advanced

i am trying to read the value of an UDT tag in VBS eg.

M600
.CTW
.STW
.ADDR

M601
.CTW
.STW
.ADDR

M602
.CTW
.STW
.ADDR

etc...............

if i read the Tag directly HmiRuntime.SmartTags("M600.ADDR")

Dim startaddr,Tagname

startaddr = HmiRuntime.SmartTags("M600.ADDR")

then no problem

but if i want to use indirect addressing like this :

SOME_MOTOR = "M600"
Tagname =  SOME_MOTOR & ".ADDR"

startaddr = HmiRuntime.SmartTags(Tagname)

i get the following error

Error no tag 'M600.ADDR' in script ,MOT. in line 6

Whats wrong.................................

Murof

Hello Rivas

You can read in the Help System the following Information:

-------------------------------------------------

Note
Current system behavior for dynamic access to elements of a user data type

When you compose the tag name of a user data type element dynamically in Runtime, the composed tag name is not recognized under the following condition:

Tag of the data type of the user data type is created.

Tag is not used, e.g. at an I/O field

Example:

You have configured a user data type "Motor" with the elements "RPM" (Int), "On" (Bool) and "Off" (Bool). In the project, you have configured the tag "Motor1" as instance of the user data type. You want to output the values of the elements in only one I/O field in runtime. You have configured an additional I/O field for input of the element name. The value you enter is saved to the internal tag strElementName. With the following script you output the value of an element in the I/O field "IOFieldOutputValue":

Dim strDynElementName, objIOFieldOutputValue

Set objIOFieldOutputValue = objscreen.ScreenItems("IOFieldOutput")

'Get element name from tag value

strDynElementName = SmartTags("strElementName").Value

'Create tag name

objIOFieldOutputValue.ProcessValue = SmartTags("Motor1."+strDynElementName).Value

Help:

Configure a separate I/O field for each user data type element, for example, in an additional screen. Interconnect the "process value" with the respective user data type element.

-------------------------------------------------

Bye Murof

 Oh my god. Is that still right? I use TIA16 and confirm same behavior.

Are there any other solutions? It is not possible for me to place for every variable an io-field on a screen. 

PS: Maybe, I can (automated) write script, which contains a "SmartTags"-Call for every varname without dynamic.