09.02  Start-Up 
Siemens AG    6SE7087-6AK85-1AA0 
4-13 
Rectifier/Regenerating Unit    Operating Instructions 
4.3.1.1.2  Overview of the control word (control word 1 and control word 2) 
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2
3
4
5
6
7
8
9
10
11
12
13
14
15
0
PMU Display 
"Control word 1"   (visualization parameter r550 or r967) 
Bit   High   Low  Comments  Source 
selection
0  ON   OFF1 (stop)  (Priority OFF 2/1)  P554 
1  Operating condition  OFF2 (electrical)  3 sources simultaneously effective; 
(Priority OFF 2/1) 
P555 
P556 
P557 
2     always HIGH   
3  Operating condition  Inhibit operation  Firing pulse enable  P561 
4     always High   
5     always High   
6     always High   
7  Acknowledge    Simultaneously  effective from 3 
sources and PMU; 
Positive edge evaluation 
P565 
P566 
P567 
8  Inching 1 ON  Inching 1 OFF  Same effect as ON/OFF1  P568 1) 
9  Inching 2 ON  Inching 2 OFF  Same effect as ON/OFF1  P569 1) 
10  Control from the PLC  No control  Only effective via 
CB,TB,SST1,SST/SCB 
 
11  Ud reduction requested  Ud reduction inactive    P571 1) 
12  Regenerating enabled  Regenerating inhibited    P572 1) 
13  No fault, external 3  Fault, external 3    P573 1) 
14 Motoring  Generating  Specification of the direction of supply  P574 1) 
15  No fault, external 1 Fault, external 1   P575 
 
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18
19
20
21
22
23
24
25
26
27
28
29
30
31
16
 PMU Display 
"Control word 2"  (visualization parameter r551) 
Bit   High   Low  Comments  Source 
selection
16      
17      
18  RDS (reserve data set) bit 0 (LSB)  Logic operation with bit 19  P578 1) 
19  RDS (reserve data set) bit 1 (MSB)  Logic operation with bit 18  P579 1) 
20      
21      
22        
23  12-pulse mode selected  No 12-pulse mode    P583 1) 
24        
25        
26  No fault, external 2 Fault, external 2   P586 
27  Slave S/F unit  Master S/F unit  Changeover Ud/Id control  P587 
28  No alarm, external 1  Alarm, external 1    P588 
29  No alarm, external 2  Alarm, external 2    P589 
30  Reserve setting for 
setpoints and control word 
Basic setting for setpoints 
and control word 
 P590 
31  HS checkback signal  No HS checkback signal  Can only connected at the converter 
term. strip or SCB 
P591 
1) This bit has a different meaning for the rectifier/regenerating unit as for the converter 
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