Siemens SIMATIC HMI Series System Manual page 200

Licensing
7.3 Basic license types and license types in WinCC
License Types
Count relevant
Trial
Master License Key
See also
WinCC in the Demo Mode (Page 201)
Overview of the licensing (Page 194)
200
Description
With this license, the use of the software is limited to the number of tags or clients specified in the
agreement.
In case of several licenses of the "Count Relevant" type, the objects listed under "Validity" are
added together.
Read the installation notes of the Information Server to learn about about particular features related
to the archive licenses for the SIMATIC Information Server.
The Count Relevant License is identified by "SIFC" or "SISC".
With these licenses, software utilization is limited to the WinCC Trial installation.
The use is limited to 30 days from the first day of use. The software may only be used for purposes
of testing and validation.
The Trial License is identified by "SITT".
With this license, the software may be used without restriction.
The Master License Key is identified by "SIEL".
WinCC: General information and installation
System Manual, 02/2017, A5E40840020-AA