Status and error messages of the redundant Compact FF Link
LEDs Meaning Solution
SF BF FF ACT FF BF DP ACT DP On
Off Off On Off On On Redundancy: Active channel (Good sta‐
tus)
The Compact FF Link is exchanging da‐
ta between the DP master and the low‐
er-level FF devices.
Off Off Off Off Off On Redundancy: Passive channel (Good
status)
The Compact FF Link is a passive chan‐
nel of the redundant Compact FF Link
and is ready to assume the active chan‐
nel.
Off Off Off Off Off Off
● No voltage is applied to the
Compact FF Link.
● Applied supply voltage is not within
permissible range.
● Hardware fault of the
Compact FF Link.
● Switch on the
power supply
module.
● Check the voltage
applied
● Replace the
Compact FF Link.
On On On On On On All LEDs are switched on for approx.
1 s.
Compact FF Link is starting up.
* * On * * On Active channel
The Compact FF Link takes over the
power supply for the FF segment.
* * * On Off * The Compact FF Link has no connec‐
tion to a DP Master.
No connection to the DP Master.
On Off Off On Off Off After startup and at restoration of facto‐
ry settings:
This only occurs when the PROFIBUS
address (DIP switch) is "0" at Power
ON. Temporary state while the default
FF configuration data is being restored
in the retentive memory.
When startup is complete, the "BF DP"
LED flashes (slowly).
* * * * * Flash‐
es slow‐
ly
The FF segment is overloaded (flashing
frequency of 0.2 Hz).
Check the number of
connected FF devi‐
ces and their total cur‐
rent.
* * * Flashes * On After startup:
The Compact FF Link has no active
communication with the DP master.
Temporary status when the Compact
FF Link has no connection to the DP
master.
● Check the
PROFIBUS
address.
● Check whether
the correct project
is loaded in the
CPU.
Alarm, error, and system messages
11.1 Diagnostics using LEDs
Compact FF Link
60 Operating Instructions, 03/2015, A5E35651552-AA
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