Speed Control With External Analog Speed Setpoint - Siemens SINAMICS V90 Operating Instructions Manual

7.5.1.1

Speed control with external analog speed setpoint

In the S mode, when the digital input signals SPD1, SPD2 and SPD3 are all at low level (0),
analog voltage from the analog input 1 is used as the speed setpoint.
The analog voltage from the analog input 1 correponds to a parameterized speed value.
Default speed value is rated motor speed. The analog voltage of 10 V corresponds to the
maximum speed setpoint (V_max) and this maximum speed setpoint can be specified by
parameter p29060.
Parameter
p29060
The relationship between the analog voltage and the speed setpoint is shown as follows:
Note
If the drive is working with external analog speed setpoint, the system continues to work
automatically after you repower on the 24 VDC power supply which is shut off unexpected
for the drive. In this case, do not touch the equipment.
Offset adjustment for analog input 1
Offset exists for the input voltage from the analog input 1. You have two methods to adjust
such offset:
● Automatic adjustment with BOP function: refer to "Adjusting AI offsets (Page 157)" for
details.
● Manual input of an offset value (p29061)
SINAMICS V90, SIMOTICS S-1FL6
Operating Instructions, 09/2016, A5E36037884-002
Range
6 to 210000
Parameter Range
p29061 -0.5000 to
0.5000
Factory Unit
setting
3000 rpm Maximum analog speed setpoint corresponding
to 10 V
Factory set- Unit
ting
0.0000 V Offset adjustment for analog input 1 (speed
setpoint)
Control functions
7.5 Speed control (S)
Description
Description
199