Siemens 125-3208 User Manual

Page of 64
SED2 VFD Electronic Bypass Option Operating Instructions 
34 
 
Siemens Building Technologies, Inc. 
Automatic Restart Continued
 
Parameter Description 
Action 
Setting/ 
Default 
P1210 
(Continued) 
P1210 = 4, Restart after supply power 
brownout (P1211 disabled): 
For these settings it is fundamental that 
the drive only restarts if it has been in a 
RUN state at the time of the fault 
(F0003). The inverter will acknowledge 
the fault and will restart the drive after a 
blackout or brownwout. It is necessary 
that the ON command is wired via 
digital input (DIN). 
P1210 = 5, Restart after blackout or fault 
(P1211 disabled): 
The inverter will acknowledge the faults 
(F0003 etc.) at power on after blackout 
and will restart the drive. It is necessary 
that the ON command is wired via digital 
input (DIN). 
P1210 = 6, Restart after supply power 
brown/blackout or fault (P1211 disabled):
The inverter will acknowledge the faults 
(F0003 etc.) at power on after blackout or 
brownout and will restart the drive. It is 
necessary that the ON command is wired 
via digital input (DIN). Setting 6 causes 
the motor to restart immediately.  
P1210 = 7, Restart after supply power 
brown/blackout or fault (P1211 
enabled):  
This setting is for use where an external 
bypass system or process is interlocked 
with a relay that is set to 
P0731/P0732=52.3 (fault). The inverter 
functions the same as P1210=6 (trip on 
brownout, blackout or fault) but uses 
P1211 and only sets the fault bit 
P0731/P0732=52.3 when the specified 
number of restarts defined in P1211 has 
expired. If no trip occurs after 2 hours, 
the fault counter is reset.
 
 
 
NOTES: 
1.  Auto restart requires a constant ON command (such as via a digital input). 
2.  P1200 flying start must be used in cases where the motor may still be turning, such as after a brief input power 
break, or can be driven by the load.  
3. A supply power brownout is when the power is interrupted and reapplied before the operator panel display has 
gone dark. It is a very short supply power break where the DC link has not fully collapsed. 
4. A 
supply power blackout
 is when the operator panel display has gone dark before the power is reapplied. 
It is a long supply power break where the DC link has fully collapsed.