Redundant Automation Units - Siemens SICAM AK Manual

1.3

Redundant Automation Units

Connection between both BSEs over HSL:
The High Speed Link (HSL) is used for the synchronization of both redundant BSEs
(C-CPUs).
In the case of AU redundancy the HSL is established with a fiber optic cable.
Exception: If the distance between both AUs is more than 200 m, in all cases the redundancy
synchronization must take place over a separate fast data connection.
That causes a high load in the AU. Therefore take the following into consideration:
•
Parameterize a connection between both AUs on that PRE, that is to be responsible for
the synchronization of both BSEs
•
The PRE for this data connection must be coupled to that BSE which is to be
synchronized.
•
Use cycle times that are long enough for your CAEx plus application
•
Make sure, that both BSEs have an identical configuration and that they are loaded with
the same FW revision and the same parameters (state).
SICAM RTUs, SICAM AK Redundancy
DC2-026-2.07, Edition 10.2016
Unrestricted
Redundancy via SCA-RS
41