Migration
5
5.1 Introduction
Introduction
This section contains information on the migration of WinCC projects created in WinCC V6.2
SP3 or higher.
When you open a project of a previous version in WinCC V7.4, you are prompted to migrate
it. However, you may also use WinCC Project Migrator to migrate several WinCC projects in
a single step.
Prior to migration, it is recommended to make a backup copy of the original version of the
project. For more information on this, refer to the "Working with WinCC" > "Working with
projects" > "Copying and duplicating projects" section in the WinCC Information System.
Multi-user Projects
When
you
are working with a multi-user project in WinCC V7.4 that was created in the previous
version, migrate the individual multi-user projects from all servers in the system.
Redundant Systems in Normal Operation
A project can be upgraded in a redundant system without deactivating operation. This requires
that you update the server, clients with their own project and clients without their own project
in a certain sequence. Detailed instructions are provided in the section "Upgrading Redundant
Systems in Normal Operation".
NOTICE
Migrating redundant systems without extended interruption
In order not to affect system operation, it is essential to observe the sequence of steps
described and to complete all the steps without any long interruptions.
A client may always only be connected to one server, on which the same WinCC version is
installed.
Behavior during migration of ServiceMode projects
At the start of migration, the Migrator checks whether or not the project on hand is a
ServiceMode project. The following is also verified if it is a ServiceMode project:
● If a service user has been entered
●
If the service user is available
WinCC: General information and installation
System Manual, 02/2017, A5E40840020-AA 135
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