1. SIMATIC ET 200M / MP Systemredundancy

2. Redundancy with PROFINET
Possible Configurations PN
Sync
ET 200M/MP
IM153-4 PN ST
IM155-5 PN ST
DP/ MPI DP
Ring structure with standard-CPU (MRP)
Standard-CPU (IO Controller)
System redundancy with S7-400H
S7-400H
DP/ MPI DP
DP/ MPI DP
Sync PN PN
Sync PN
Sync PN
Sync PN
ET 200M/MP
ET 200M/MP
ET 200M/MP
IM PN HF
IM PN HF

3. Redundancy with PROFINET
Control of possible errors 3 1 1 2 2
Wire break of the ring
Power off / failure of a single station
Switch over time appr. 200ms
Wire break of the ring
Power off / failure of a single station
CPU failure
Switch over time appr. 30ms  autom. synchronisation at CPU change

4. High-available automation system SIMATIC S7-400H with PROFINET I/O System Redundancy (SR)
Automatic switchover in the event of a fault
Event-controlled synchronization of both stations makes for fast and bumpless switchover
Redundant CPU picks up processing at the interruption point without loss of information and alarms.
All components can be replaced during running operation (hot swapping).
When replacing a CPU, it is automatically loaded with the latest programs and data.
Open ring architecture
SR-Support through H-CPUs and ET 200M/MP
Sync wiring
Guarantee of functionality in the case of an error in a CPU or a ring node or a bus error
Data synchronization
CPU 41x-5H
CPU 41x-5H
Failure of an IO device (ET 200M/MP) is limited to the damaged ring node
Cable break between two devices does not affect functionality of the system
Switch
PROFINET
Switch
Switch
Failure of a CPU does not affect functionality of the redundant system
Automatic synchronization after replacement of faulty component
ET 200M/MP
ET 200M/MP
ET 200M/MP
ET 200M/MP

5. SIMATIC ET 200M