Siemens SINAMICS S120 Function Manual page 233

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 5-12
Function diagrams (see SINAMICS S120/S150 List Manual)
• 6040
• 8012
Overview of important parameters (see SINAMICS S120/S150 List Manual)
• r0063[0...2]
• p1440[0...n]
• r1443
• r2169
• r2199.7
• p3236[0...n]
• p3237[0...n]
• p3238[0...n]
Drive functions
Function Manual, 11/2017, 6SL3097-4AB00-0BP5
Monitoring "Speed deviation model / external in tolerance"
Vector control - Speed controller with/without encoder
Signals and monitoring function - Torque messages, motor locked/stalled
CO: Actual speed value
CI: Speed controller actual speed value input
CO: Actual speed value actual speed value on actual value input
CO: Actual speed value smoothed messages
CO/BO: Status word, monitoring 3
Speed deviation model / external in tolerance
Speed threshold 7
Hysteresis speed 7
OFF delay n_act_motor_model = n_act_external
Vector control
5.6 Open actual speed value
233