Siemens SINAMICS G115D

Problem Possible cause Solution
The converter signals one of the
following faults:
• F07967
• F07969
The motor has signi󹪝cant pole sa‐
liency.
Change the PolID technique:
p1980 = 4 or p1980 =10.
The current is too high during
pole position identi󹪝cation.
Decrease the value of p329 incre‐
mentally by 10%.
The motor stalls or starts with dif‐
󹪝culty.
The converter does not generate
enough starting torque
Increase the value of p1610
or/and p1611 incrementally by
10%.
Let the motor cool down before
each start attempt.
Motor is oversaturated. Decrease p1610 and p1611 in‐
crementally by 10%.
Increase ramp-up time p1120.
Increase initial rounding time
p1130.
The motor speed tends to oscil‐
late.
The transition from open loop to
closed loop phase during acceler‐
ation is not stable.
Increase p1755 incrementally by
approx. 10% until the motor ac‐
celerates smoothly and stably.
The speed controller gain is too
high.
Optimize the speed controller.
Motor overspeed The speed overshoots after the
motor accelerates.
Increase ramp-up time p1120 or
󹪝nal rounding time p1131.
Optimize the speed controller.
Parameters
Number Name Factory setting
p0304[M] Rated motor voltage 0 V
p0305[M] Rated motor current 0A
p0307[M] Rated motor power 0kW
p0310[M] Rated motor frequency 0Hz
p0311[M] Rated motor speed 0rpm
p0314[M] Motor pole pair number 0
p0316[M] Motor torque constant 0Nm/A
p0329[M] Motor pole position identi󹪝cation current 0A
p1080[D] Minimum speed 0rpm
p1120[C] Ramp-function generator ramp-up time Dependent on rat‐
ed power
p1131[C] Ramp-function generator 󹪝nal rounding time 0s
p1610[D] Torque setpoint static (sensorless) 50%
p1611[D] Additional acceleration torque (sensorless) 30%
p1755[D] Motor model changeover speed sensorless operation 210000rpm
p1980 PolID technique 4
Advanced commissioning
7.20Motor control
SINAMICS G115D Wall Mounted distributed drive
296 Operating Instructions, 07/2023, FW V4.7 SP14, A5E52808211A AA