Configuration Variants Of The Compact Ff Link - Siemens SIMATIC Compact FF Link Operating Instructions Manual

4.3

Configuration variants of the Compact FF Link

Different configuration variants are possible with the Compact FF Link:
● Configuration with one Compact FF Link
● Configuration with two Compact FF Links
Configuration variant with one Compact FF Link (configuration without FF Link Master redundancy)
Configuration; information about this can be found in section "Single-channel connection of
the Compact FF Link (Page 21)".
Information about installation can be found in section Installing the Compact FF Link for single-
channel operation (Page 26).
Configuration variants with two Compact FF Links (configuration with FF Link Master redundancy)
A bus link with increased availability of the FF segment is obtained by redundant configuration
with two Compact FF Links. The redundant configuration with two Compact FF Links requires
the connection to a redundant automation system (S7-4xxH).
For redundant operation you always need the BM Compact FF Link bus module and two
Compact FF Links (redundant pair). Depending on the configuration variant, at least one active
field distributor is required:
● Configuration with coupler redundancy
You also need an active field splitter, in the FF segment. The active field splitter connects
two Compact FF Links to an FF segment. The Compact FF Links monitor each other for
power failure and detect errors.
Information about this can be found in section "Redundant connection of the Compact FF
Link (Page 21)".
● Configuration with ring redundancy
You also need at least one active field distributor in the FF segment. The active field
distributor enables the configuration of ring redundancy on the FF segment. The
configuration increases the availability of the FF segment and includes the coupler
redundancy.
The use of ring redundancy allows the bus segment to be repaired or extended during
operation. The automatic termination of the cable end allows, for example, additional FF
devices to be connected to extend the bus segment.
Information on this can be found in section "Redundant connection of the Compact FF
Link (Page 21)"
Information about installation can be found in section Installing the Compact FF Link for
redundancy mode (Page 28).
Note
Only one FF segment can be connected per bus link.
For redundant operation the Compact FF Links should always be operated with separate power
supplies.
Compact FF Link
Operating Instructions, 03/2015, A5E35651552-AA
4.3 Configuration variants of the Compact FF Link
Application planning
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