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Siemens Industry Online Support
Siemens AG
Entry type: FAQ Entry ID: 23183376, Entry date: 05/08/2006
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Why can WinCC tags have the status "write-protected" and thus cannot be edited, deleted or moved?

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Description:
WinCC tags received the "write-protected" status when they are created by AS-OS Engineering (OS Compile). In this case you cannot edit the tags in the WinCC project, but only in the associated STEP 7 project. If, for example, the attribute "S7_m_c = true" is set at a block connection, at an input in the global data block or symbol table, then a corresponding tag is created in the WinCC Tag Management. The WinCC data type here is dependent on the data type in the STEP 7 project.

Note:
The WinCC Smart Tool "WinCC Configuration Tool" provides an alternative option for editing/deleting tags. However, renewed OS compilation overwrites the changes.


Security information
In order to protect technical infrastructures, systems, machines and networks against cyber threats, it is necessary to implement – and continuously maintain – a holistic, state-of-the-art IT security concept. Siemens’ products and solutions constitute one element of such a concept. For more information about cyber security, please visit
https://www.siemens.com/cybersecurity#Ouraspiration.
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