To prevent the lower-level FF segment from becoming inoperative, the Compact FF Links
should be configured with independent switchable voltage supplies (e.g. by using two power
supply modules).
In redundancy mode, it is not necessary to load parameters to the new Compact FF Link if the
other Compact FF Link is still running.
Note
If you want to replace the active Compact FF Link ("ACT FF" or "ACT DP" LED On), the
following displays must not be activated on the passive Compact FF Link:
● "SF" LED is flashing at 0.5 Hz
● "BF FF" LED is lit or flashing
● "BF DP" LED is lit or flashing (This display indicates that the communication to the
PROFIBUS DP is disrupted).
Have you replaced an active Compact FF Link?
LEDs "ACT FF" or "ACT DP" on
LEDs "ACT FF" or "ACT DP" off
The data traffic was switched over in the redundant
bus link to the other Compact FF Link. This main‐
tains the data traffic to its DP master.
No change to data traffic:
The active Compact FF Link has maintained the
data traffic to its DP master.
You can find additional information on this in section Firmware update of the Compact FF
9.2
Replacing active field distributors
Before replacing an active field field distributor, always observe the information in Operating
Instructions
DP/PA Coupler, Active Field Distributors, DP/PA Link and Y Link.
9.3
Firmware update of the Compact FF Link
The firmware update is a standard mechanism in
STEP 7. A firmware update is used to update
the internal main program (firmware) for a device.
Service and maintenance
9.3 Firmware update of the Compact FF Link
Compact FF Link
50
Operating Instructions, 03/2015, A5E35651552-AA
