S7-300 and S7-400 CPUs
For S7-300 and S7-400 CPUs no particular configuration is required.
It has also been successfully tested with the Hilscher Netlink NL50 profibus converter.
S7-1200 and S7-1500 CPUs
For S7-1200 and S7-1500 CPUs it is necessary to ensure these conditions:
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Optimized access to the blocks (DB) of interest must be disabled

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The access level must be 'full' and GET/PUT requests must be enabled:
