Siemens SINAMICS V20 Series, Operating Instructions Manual

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Parameter list
7.2 Parameter list
SINAMICS V20 Inverter
170
Operating Instructions, 07/2012, A5E03728167
Parameter Function Range Factory
default Can be
changed Scaling Data
set Data
type Acc.
Level
Note: The dual ramp algorithm uses r2198 bits 1 and 2 to determine (f_act > P2157) and (f_act < P2159). P2150
is used to apply hysteresis to these settings, so the user may wish to change the value of this parameter to
make the dual ramp function more responsive. It is not recommended that the dual ramp function is used
in conjunction with JOG ramp.
See P1124.
r1199.7...12 CO / BO: RFG status
word
- - - - - U16 3
Displays status of ramp function generator (RFG).
Bit Signal name 1 signal 0 signal
07 Ramp #0 active Yes No
08 Ramp #1 active Yes No
09 Ramping finished Yes No
10 Direction right / left Yes No
11 f_act > P2157(f_2) Yes No
12 f_act < P2159(f_3) Yes No
Note: See P2157 and P2159.
P1200 Flying start 0 - 6 0 U, T - - U16 2
Starts inverter onto a spinning motor by rapidly changing the output frequency of the inverter until the
actual motor speed has been found. Then, the motor runs up to setpoint using the normal ramp time.
0 Flying start disabled
1 Flying start always active; searches in both directions
2 Flying start active after power on, fault, OFF2; searches in both directions
3 Flying start active after fault, OFF2; searches in both directions
4 Flying start always active; searches in direction of setpoint only
5 Flying start active after power on, fault, OFF2; searches in direction of setpoint
only
6 Flying start active after fault, OFF2; searches in direction of setpoint only
Notice: Flying start must be used in cases where the motor may still be turning (e.g. after a short mains break) or
can be driven by the load. Otherwise, overcurrent trips will occur.
Note: Useful for motors with high inertia loads. Settings 1 to 3 search in both directions. Settings 4 to 6 search
only in direction of setpoint.
P1202[0...2] Motor-current: flying start
[%]
10 - 200 100 U, T - DDS U16 3
Defines search current used for flying start. Value is in [%] based on rated motor current (P0305).
Note: Reducing the search current may improve performance for flying start if the inertia of the system is not
very high. However, search current settings in P1202 that are below 30% (and sometimes other settings in
P1202 and P1203) may cause motor speed to be found prematurely or too late, which can result in F1 or
F2 trips.
P1203[0...2] Search rate: flying start
[%]
10 - 500 100 U, T - DDS U16 3
Sets factor (in V/f mode only) by which the output frequency changes during flying start to synchronize with
turning motor. This value is entered in [%]. It defines the reciprocal initial gradient in the search sequence.
P1203 influences the time taken to search for the motor frequency.
Example: For a motor with 50 Hz, 1350 rpm, 100 % would produce a maximum search time of 600 ms.
Note: A higher value produces a flatter gradient and thus a longer search time. A lower value has the opposite
effect.