Important Additional Information - Siemens SIMATIC BATCH Operating Manual

3.5.5.8

Important additional information

Redundant server pair
● In a compact system (WinCC server and batch server on same PCs), the "Start SIMATIC
BATCH automatically after starting WinCC" setting should only be made once the BATCH
process cell (database) has been created. If this is not done, booting the system will be
interrupted with an error under the precondition "Just one server switched on, no client
started, BATCH process cell still not created".
● In a distributed system (WinCC server and batch server on different PCs), the "Start
SIMATIC BATCH automatically after starting WinCC" setting is blocked.
● When starting a redundant BATCH server or during a redundancy switchover, the
databases of the standby server are synchronized with the databases of the master server.
Do not abort the copy procedure needed for this, e.g. by powering down/switching off one
of the BATCH servers. Otherwise, the database of the standby server will have to be reset.
● If a redundancy failover occurs during active client applications, e.g., during actions such
as archiving of batches, reading in of process cell data, starting a print preview or a print,
the current actions may be adversely affected.
● A "Restart dialog" appears on the previous master once a switchover to a redundant pair
of servers caused by an error has occurred. Please follow the restart request to correctly
restart the PC. You should first close active programs.
● Both when starting and ending database synchronization between master and standby, the
WinCC messages "Data synchronization started" and "Data synchronization complete" are
produced.
● Batch data management There are no longer any restrictions for the start order of the
BATCH server in a redundant system. The system automatically connects to the valid
project database. You should, however note that following any total system failure in a
distributed system, the servers must be started up in the following order. First start the
WinCC server and wait until its redundant WinCC server is synchronized. Start the BATCH
server only when this completed.
Downloading the BATCH process cell data
When loading the BATCH process cell data from the BATCH configuration dialog, both the
BATCH server (master and standby) and all BATCH clients defined in the project are supplied
with data. However, this data is not valid in the BATCH system immediately after downloading,
but rather not until a defined point in time when this data is applied by the BATCH system.
Data is applied through the following actions:
● The distribution of the components and the BATCH server configuration, e.g. CDV on/off,
are applied during startup of the BATCH server PC (master and standby).
● The BATCH process cell data is applied in the BCC through the active user action "Update
process cell".
In the case of a redundant system, the BATCH process cell data is not automatically
synchronized on the redundant BATCH server when just one BATCH server PC is started up.
This means that when you restart a BATCH server, it is imperative that you also restart its
SIMATIC BATCH V8.2
Operating Manual, 02/2016, A5E35958174-AA
Product introduction and installation
3.5 Possible configurations
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