Siemens SINAMICS G150 - Page 459

Setpoint channel and closed-loop control
7.4 Vector speed/torque control with/without encoder
Converter cabinet units
Operating Instructions, 07/2016, A5E03347396A
459
Monitoring of the speed deviation between motor model and external speed
The external actual speed (r1443) is compared with the actual speed of the motor model
(r2169). If the deviation is greater than the tolerance threshold set in p3236, after the switch-
off delay time set in p3238 expires, fault F07937 (Drive: Speed deviation motor model to
external speed) is generated and the drive switched-off corresponding to the set response
(factory setting: OFF2).
Figure 7-20 Monitoring "Speed deviation model / external in tolerance"
Function diagram
FP 6040
Vector control – speed controller with/without encoder
FP 8012
Signals and monitoring function – Torque messages, motor blocked/stalled
Parameter
•
r0063[0]
Actual speed value unsmoothed
•
p1440
CI:
Speed controller actual speed value
•
p1442
Speed controller actual speed value smoothing time
•
r1443
CO: Speed controller actual speed value at actual value input
•
p1452
Speed controller actual speed value smoothing time (without encoder)
•
r2169
CO: Actua
l speed value smoothed messages
•
r2199.7
Speed deviation model / external in tolerance
•
p3236
Speed threshold 7
•
p3237
Hysteresis speed 7
•
p3238
Switch
-off delay n_act_motor model = n_act_external