Zero Speed Clamp - Siemens SINAMICS V90 Operating Instructions Manual

7.5.5

Zero speed clamp

The function of zero speed clamp is used to stop motor and lock motor axis when motor
speed setpoint is below a parameterized threshold level (p29075).
This function is available only when the analog input 1 is used as the source of speed
setpoint. The digital input signal ZSCLAMP is used to activate this function. When both
motor speed setpoint and motor actual speed are below the parameterized threshold level
and signal ZSCLAMP is logic "1", the motor is locked. Drive exits from clamping state either
when the motor speed setpoint is above the threshold level or when the signal ZSCLAMP is
logic "0".
Parameter settings
Parameter Value range
p29075 0 to 200
p29060 6 to 210000
DI configuration
Signal type Signal name
DI ZSCLAMP
Note
When p29003=4 and CMODE is "1", the drive is working in speed control mode. In this case
if ZSCLAMP is activated, the drive will switch to PTI control mode and PTI pulse input will
lead motor running under PTI control mode.
Note
For more information about the signal ZSCLAMP, refer to "DIs (Page 70)".
SINAMICS V90, SIMOTICS S-1FL6
Operating Instructions, 07/2015, 6SL3298-0AV60-0BP0
Default Unit
200 rpm Zero speed clamp threshold
3000 % Maximum analog speed setpoint corresponding to 10 V
Pin assignment Setting
To be assigned
Description
1 When the motor speed setpoint is below zero speed
clamp threshold, the motor is locked.
0 No action
Control functions
7.5 Speed control (S)
Description
177