Setting functions
8.8 Application-specific functions
Converter with control units CU250D-2
234 Operating Instructions, 04/2014, FW V4.7, A5E34261542B AA
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 8-45 Function plan and time response of load-interruption monitoring
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 Monitoring the load torque (system protection)
(Page 232)) 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)
Connect the load monitoring to a DI x digital input of your choice.
For more information, see the List Manual (the parameter list and function diagram 8013).
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