Function Diagrams - Siemens SINAMICS S150 NEMA Operating Instructions Manual

Setpoint channel and closed-loop control
7.4 Vector speed/torque control with/without an encoder
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

Function diagrams

FP 6040
FP 8012
Parameters
• r0063[0]
• p1440
• p1442
• r1443
• p1452
• r2169
• r2199.7
• p3236
• p3237
• p3238
480
Monitoring "Speed deviation model / external in tolerance"
Vector control – Speed controller with/without encoder
Signals and monitoring function – Torque messages, motor blocked/stalled
Actual speed value unsmoothed
CI: Speed controller actual speed value
Speed controller actual speed value smoothing time
CO: Speed controller actual speed value at actual value input
Speed controller actual speed value smoothing time (without encoder)
CO: Actual speed value smoothed messages
Speed deviation model / external in tolerance
Speed threshold 7
Hysteresis speed 7
Switch-off delay n_act_motor model = n_act_external
Operating Instructions, 12/2018, A5E36652151A
Enclosed Drives