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Configuration Guide
6.26.2.8
Global Settings (Monitoring of Servers and AS)
The Route Control server or servers constantly monitor the connections to the
automation systems and indirectly also the connection to the corresponding peer
computer. Monitoring occurs in the following sequence:
1. The master computer sends a supervising telegram to each automation system
2. The automation system sends a response telegram to each server (master and
standby)
3. Both servers have an internal timer (see 'Cycle time for server/AS monitoring'
key)
4. If this time runs out before a response telegram has been received from the
automation system, then a counter increases by one
5. If the counter reaches a certain limit (see 'Number of permissible missing
monitoring telegrams' key), a failover of the servers occurs (redundancy case)
6. The server tolerance time is calculated from a combination of the 'Cycle time
for server/AS monitoring' and 'Number of permissible missing monitoring
telegrams'):
Tolerance time (in seconds) = cycle time for server/AS monitoring (in seconds)
x number of missing monitoring telegrams permitted
7. Automatic failover occurs only if it has been enabled (see 'Automatic failover of
servers in the event of a fault')
8. If automatic failover is not enabled, then both servers become standby servers,
and the user must perform the failover manually.
6.26.2.9
Configuration of a Route Control Server
See Route Control Wizard: Network Constellations
6.26.2.10
Configuration of a Route Control Server Pair (Redundancy)
See Route Control Wizard: Network Constellations
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Process Control System PCS 7 - SIMATIC Route Control
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