Parameter Assignment Of The Block Properties - Siemens SIMATIC S7-1500 Function Manual

3.20.5.2

Parameter assignment of the block properties

Configuring access to the Web API in the TIA Portal
To restrict the read and write access to data blocks of your project, you can define the
desired parameters in the attributes of the respective block.
To allow the Web API to access the data block, select the check box "DB accessible from
Webserver".
Note
F-blocks
Note that fail-safe blocks allow read access only. It is not possible to write tags into fail-safe
blocks.
Parameter assignment for access to the Web API in tag tables
For read and write access of Web API to tags, the options "Accessible from
HMI/OPC UA/Web API" and "Writable from HMI/OPC UA/Web API" must be enabled:
Figure 3-80 Tag table in the TIA Portal
Web server
Function Manual, 11/2019, A5E03484625-AG
3.20 API (Application Programming Interface)
Web pages
175