Siemens SINAMICS G120XA - Torque Monitoring

6.7.6.4 Torque monitoring
Function description
In applications with fans, pumps or compressors with the flow characteristic, the torque follows
the speed according to a specific characteristic. An insufficient torque for fans indicates that the
power transmission from the motor to the load is interrupted. For pumps, insufficient torque can
indicate a leakage or dry-running.
The converter monitors the torque based on the envelope curve depending on the speed
against a lower and upper torque.
6SHHG>USP@
SVSHHGWKUHVKROG6SHHGWKUHVKROGS
6SHHGWKUHVKROGSSPD[LPXPVSHHG
7RUTXHWKUHVKROGORZHUS
7RUTXHWKUHVKROGXSSHUS
7RUTXHWKUHVKROGORZHUS
7RUTXHWKUHVKROGXSSHUS
7RUTXHWKUHVKROGORZHUS
7RUTXHWKUHVKROGXSSHUS
7RUTXH>1P@
If the torque lies in the impermissible range longer than time p2192, the converter reacts as
specified in p2181.
The monitoring is not active below speed threshold 1 and above speed threshold 3.
Parameters
Number Name Factory setting
p2181[D] Load monitoring, response 0
p2182[D] Load monitoring, speed threshold 1 150 rpm
p2183[D] Load monitoring, speed threshold 2 900 rpm
p2184[D] Load monitoring, speed threshold 3 1500 rpm
p2185[D] Load monitoring, torque threshold 1, upper 10000000 Nm
p2186[D] Load monitoring torque threshold 1, lower 0 Nm
p2187[D] Load monitoring torque threshold 2, upper 10000000 Nm
p2188[D] Load monitoring torque threshold 2, lower 0 Nm
p2189[D] Load monitoring torque threshold 3, upper 10000000 Nm
p2190[D] Load monitoring torque threshold 3, lower 0 Nm
p2191[D] Load monitoring torque threshold, no load 0 Nm
p2192[D] Load monitoring, delay time 10 s
p2193[D] Load monitoring configuration 1
Advanced commissioning
6.7 Drive protection
SINAMICS G120XA converter
314 Operating Instructions, 03/2019, FW V1.0, A5E44751205B AB