Siemens SINAMICS G120 - Load Failure Monitoring

Setting functions
8.7 Application-specific functions
Inverter with CU230P-2 Control Units
Operating Instructions, 11/2013, FW V4.6.6, A5E02430659B AG
293
Parameter
Description
p2190
Load monitoring torque threshold 3, lower
p2192
Load monitoring, delay time
Delay time for the message "Leave torque monitoring tolerance band"
Additional information about these functions is provided in the function diagrams 012 and
8013 as well as in the parameter list of the List Manual.
8.7.8
Load failure monitoring
Load failure
Using this function, the inverter monitors the speed or velocity of a machine component. The
inverter evaluates whether an encoder signal is present. If the encoder signal fails for a time
that can be adjusted, then the inverter signals a fault.
Examples of how the function can be used:
● Gearbox monitoring for traction drives and hoisting gear
● Drive belt monitoring for fans and conveyor belts
● Blocking protection for pumps and conveyor belts
Figure 8-30 Load failure monitoring using a digital input
Parameter
Description
p2192
Load monitoring delay time
(factory setting: 10 s)
After the motor is switched on, if the "LOW" signal is present at the associated
digital input for longer than this time, the inverter signals a load failure (F07936).
p2193 = 1…3
Load monitoring configuration
(factory setting: 1)
0: Monitoring is deactivated
1: Torque monitoring (see Monitor the load torque (system protection) (Page 291))
and load failure
2: Speed deviation monitoring (see below) and load failure
3: Load failure monitoring
p3232 = 722.x
Load monitoring failure detection
(factory setting: 1)
Interconnect the load monitoring with a digital input of your choice.
For more information, see the List Manual (the parameter list and function diagram 8013)