Fault and Alarm Messages  09.02 
7-6  Siemens AG    6SE7087-6AK85-1AA0 
  Rectifier/Regenerating Unit    Operating Instructions 
Fault 
No. 
Fault description 
Fault 
value 
Meaning  Possible causes 
Countermeasures 
F066 SST2 Telegr. 
Peer-to-peer telegram to SST1 failed 
 
Following receipt of a valid telegram, no 
further telegrams were received for longer 
than the time set with parameter 
P687.i003 
- -  - Cable break 
F070  SCB Initial  
SCB initialization error 
 
An error has occurred when initializing the 
SCB. 
1 
 
2 
5 
6 
10 
SCB not plugged in or SCB module 
code wrong 
SCB not compatible 
Wrong initialization data 
Timeout when initializing 
Error in the configuration channel 
- Plug in the SCB 
- Check the SCB and/or replace it 
- Correct the initialization data 
F072 SCB Heartb. 
SCB heartbeat 
 
SCB no longer processes the heartbeat 
counter. 
-  -  - Replace the SCB 
- Check the connection between 
the module rack and the option 
module 
F073 Sl1 AnaIn1 
Current at analog input 1, slave 1, under 4 
mA 
-  -  - Check the connection between 
the signal source and the SCI1-
module (slave 1) -X428:4, 5 
F074 Sl1 AnaIn2 
Current at analog input 2, slave 1, under 4 
mA 
-  -  - Check the connection between 
the signal source and the SCI1-
module (slave 2) -X428:7, 8 
F075 Sl1 AnaIn3 
Current at analog input 3, slave 1, under 4 
mA 
-  -  - Check the connection between 
the signal source and the SCI1-
module (slave 3) -X428:10, 11 
F076 Sl2 AnaIn1 
Current at analog input 1, slave 2, under 4 
mA 
-  -  - Check the connection between 
the signal source and the SCI1-
module (slave 3) -X428:4, 5 
F077 Sl2 AnaIn2 
Current at analog input 2, slave 2, under 4 
mA 
-  -  - Check the connection between 
the signal source and the SCI1-
module (slave 3) -X428:7, 8 
F078 Sl2 AnaIn3 
Current at analog input 3, slave 2, under 4 
mA 
-  -  - Check the connection between 
the signal source and the SCI1-
module (slave 3) -X428:10, 11 
F079 SCB Telegr. 
SCB telegram failure 
 
Following a correctly received telegram, 
no further telegram has been received 
within the time set with parameter 
P687.i002. 
-  -  - Check connection to the SCB 
F080 TB/CB Init. 
An error has occurred when initializing the 
module at the DPR interface. 
1 
2 
5 
6 
7 
TB/CB not plugged in 
TB/CB not compatible 
Error in initializing data 
Timeout when initializing 
TB/TC module code wrong 
- Contact problem in connection 
between module rack and TB 
and/or CB 
- Slot does not agree with 
assignment (P090, P091) 
- Wrong module code r723 
- Wrong module compatibility r724 
F081 TB/CB Heartb 
TB/CB heartbeat error 
 
TB or CB has stopped processing the 
heartbeat counter. 
-  -  - Contact problem in connection 
between module rack and TB 
and/or CB 
- Hardware fault (replace TB and/or 
CB) 
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