4-216
08-19 Level of low-torque detection
Range
0~300%
08-20 Time of low-torque detection
Range
0.0~10.0 Sec
The over torque detection function monitor the inverter output current or motor torque and can be used to detect
increase in inverter current or motor torque (e.g. heavy load).
The low torque detection function monitor the inverter output current or motor torque and can be used to detect a
decrease in inverter current or motor torque (e.g. belt break).
The torque detection levels (08-15, 08-19) are based on the inverter rated output current (100% = inverter rated
output current) when operating the inverter in V/F control or V/F control + PG and motor output torque (100% =
motor rated torque) when operating the inverter in SLV or SV control.
Over-torque detection
Parameter 08-13 selects over-torque detection function. An over-torque condition is detected when the output
current / torque rises above the level set in parameter 08-15 (Over-torque detection level) for the time specified in
parameter 08-06 (Over-torque detection time).
08-13=0: Over-torque detection is disabled.
08-13=1:
Over-torque detection is enabled when the output frequency reaches the set frequency.
08-13=2:
Over-torque detection is enabled during running.
Parameter 08-14 selects the way the inverter acts when an over-torque condition is detected.
08-14=0: When an over-torque condition is detected the inverter displays and over-torque detection fault and the
motor decelerates to a stop.
08-14=1:
When an over-torque condition is detected the inverter displays an over-torque detection alarm and
continues to run.
08-14=2:
When an over-torque condition is detected the inverter displays and over-torque detection fault and the
motor coasts to a stop
Figure 4.4.73 Over-torque detection operation
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