09.02  Parameter List 
Siemens AG    6SE7087-6AK85-1AA0 
5-37 
Rectifier/Regenerating Unit    Operating Instructions 
PNU 
 
*
 
: Conf. 
    Par. 
OP1S parameter name 
 
Description 
Value range  
[phys. unit] 
Selection text 
Display 
Indices 
Factory- 
setting 
See 
Modify 
(access / 
status) 
5.15 Factory parameters 
P785 
* 
I2t Control Word 
Control word for the i
2
t power section 
 
0  Response of the i
2
t monitor for the power section (i.e. 100% of 
the i
2
t value has been reached) results in an automatic 
reduction of the limit for the current setpoint to the rated DC 
current (in infeed direction or at 92% of the rated direct current 
in regenerative feedback direction) until the absolute value of 
the current setpoint has dropped below the rated DC current 
before its limit (or 92% of that in regenerative feedback 
direction) and the calculated equivalent junction temperature 
rise is again below the unit-specific response threshold. The 
current setpoint limit is then raised again. 
 
1  Response of the i
2
t monitor for the power section (i.e. 100% of 
the i
2
t value has been reached) results in fault F022 and 
disconnection. 
 
PNU=311Hex; Type=O2; Scaling: 1Hex 
=
∧
 1 
0 to 1  - 
1 
3/  HBR 
3/    B 
P793  Line Voltage Delay 
Stabilizing time for the line voltage 
 
If the "Switch-on" command is given, the unit waits in status
 o
010 for 
voltage to be applied to the power section. The line voltage is not assumed 
to be applied to the power terminals until amplitude, frequency and phase 
symmetry lie within the permissible tolerance range for longer than the time 
set with this parameter. The parameter applies to both the rectifier and 
regenerative power terminals. 
 
PNU=319Hex; Type=O2; Scaling: 1Hex 
=
∧
 0.01 s 
0.01 to 1.00 
[s] 
- 
0.03 
3/    BR 
3/    BR 
P799 Special Access 
Parameter for special access 
 
PNU=31FHex; Type=O2; Scaling: 1Hex 
=
∧
 1 
0 to 65535  - 
0 
3/U  BR 
3/    BR 
 
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