Siemens SIMATIC HMI Series System Manual page 195

A copy protection prevents the copying of license keys to a license data storage medium or
hard disk. Encryption technology and alteration of the physical file structure prevent the
"functional" copying of a license key for a protected program.
NOTICE
Do not change names and properties of the "AX NF ZZ" directory
You may change neither the name nor the properties of the "AX NF ZZ" directory because
the transferred license keys can be irretrievably lost.
While transferring a WinCC license to the hard disk, a cluster is marked as "defective". Do
not attempt to restore this cluster.
Hence you must remove the license keys before each backup or exclude them from the
backup.
RT and RC licenses
WinCC differentiates between RT licenses (Runtime) and RC licenses (Runtime and
Configuration) as well as the number of tags.
● RT licenses permit the operation of WinCC in Runtime for an unlimited period of time. The
editors may only be used in demo mode for a limited period of time.
● RC licenses permit the operation of WinCC in Runtime for an unlimited period of time and
during configuration.
You can use RC licenses locally or remotely. If an RC license is located on another
computer, it can only be used for the configuration. If you want to use Runtime, the RC
license must be available locally or you need an additional RT license.
● The number of external tags and archive tags permitted for configuration is indicated by
the number in brackets, for example, "WinCC RC (65536)". With this license you can use
up to 64*1024 external tags and up to 512 archive tags in Runtime.
The system goes into demo mode if you activate a project where the number of external
tags or archive tags exceeds the number of permitted tags. In this case the system behaves
as if there were no licenses at all.
Note
On a WinCC client, the maximum number of external tags and archive tags is always
permitted with an existing RT/RC license because the number of tags is only checked on
a server.
WinCC: General information and installation
System Manual, 02/2017, A5E40840020-AA
Licensing
7.2 Overview of the licensing
195