Siemens CU240B-2 - Load Monitoring

Advanced commissioning
6.7 Application-specific functions
Converter with the CU240B-2 and CU240E-2 Control Units
318 Operating Instructions, 01/2016, FW V4.7 SP6, A5E34259001B AC
6.7.10.2
Load monitoring
The load monitoring comprises the following components:
● Load failure monitoring
● Monitoring for torque deviation
● Speed deviation monitoring
● Pump monitoring
● Fan monitoring
If the load monitoring detects load failure, then the inverter always goes into a fault condition
and outputs fault F07936. For a torque and speed deviation, as response, you can either set
an alarm or a fault. Details are provided in the following descriptions.
Settings
Table 6- 45 Setting options for load monitoring
Parameters
Description
p2193
Load monitoring configuration
(factory setting: 1)
0: Monitoring deactivated
1: Torque and load failure monitoring
2: Speed deviation and load failure monitoring
3: Monitoring, load failure
4: Pump monitoring
5: Fan monitoring
Load failure monitoring
Principle of operation
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
Image 6-58 Function plan and time response of load-interruption monitoring