Siemens SIMATIC PCS 7 Function Manual page 84

Fault-tolerant Solutions in PCS 7
3.7 Solutions for SIMATIC BATCH
Note
When a redundant server pair is used as an OS server and BATCH server, the redundancy
connection must be configured via the Ethernet connection.
Serial linking of the BATCH server pair is not possible in PCS 7.
Availability
The following two block diagrams of fully operational systems illustrates the availability of the
BATCH clients and BATCH servers. All BATCH components form an independent redundancy
node since they are redundant. This ensures the independence of the subsystem.
Note
Only the BATCH components and the terminal bus are shown in the block diagrams. The
terminal bus marked with * can be configured redundantly with switch modules.
The communication between BATCH clients and BATCH servers is performed over the
terminal bus.
84
Fault-tolerant Process Control Systems (V8.0)
Function Manual, 03/2012, A5E02779471-02