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WinCC -- Creating HMI configurations -- Using variables

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	How can you indirectly address a variable via a C script?
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	Converting an integer variable into an ASCII variable in WinCC
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	Which logic operations of tags are possible in C scripts?
	How do you apply the functions GetTagMultiWait and SetTagMultiWait for strings in WinCC?
	What do you have to pay attention to in VBScript when linking tags bit by bit and how do you set the highest value bit (Bit 31/Bit 32) in WinCC with VBS?
	How do you use the "SetTagMultiWait()" functions to write multiple WinCC tags?
	How do you use the "GetTagMulti()" functions to read multiple WinCC tags?
	Why does accessing tags - by specifying the tag prefix in the tag name - lead to access errors within the picture window?
	How do you toggle a WinCC variable of the data type "Binary" using VBS (Visual Basic Scripting)?
	Why is the value not displayed correctly when you write a tag via VBS and then read it directly?
	How can you determine the size of the memory for C data types and C tags?

Why does accessing tags - by specifying the tag prefix in the tag name - lead to access errors within the picture window?

Part number:

Description:
This behavior is due to the picture window property "Tag Prefix". Information on this is available in the WinCC Online Help "WinCC Information System -> Working with WinCC -> VBS for Creating Procedures and Actions -> VBS Reference -> Characteristics -> T -> TagPrefix Property".

The tag prefix is prefixed to all tags in the picture window object. If the tag prefix is used both for the tag connection and for the "Tag Prefix" property of the picture window, the tag name is made up of both prefixes. The tag prefix is then double in the variable name. The access error then occurs when an attempt is made to access this tag.

Entry ID 23690358 contains an example of how to use the tag prefix.

Entry ID:22282555

Date:2008-05-13

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