ACS 880 Stop by Torque limit
We have an ACS 880 drive with gearbox motor 4kW which moves some wooden pallets along a table. Normally this drive starts and stops by ramp, but sometimes the wooden pallets are stuck and are crushed due to excessive torque produced by motor, which continue running. I would like to to set a torque limit which would trigger a Fault and stop in ACS 880. Is it possible?
I am a little bit confused about which parameters to change in this case:
30.19 and 30.20 Minimum and maximum torque?
31.25 and 31.28 Stall current limit and Stall time?
30.26 Power motoring limit?
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Some my comments:
30.19/20 will limit the torque up to the selected value but will not stop the drive (most probably will reduce the speed). You can also check 25.11/12
31.25/26 is current limit, not a torque. This is adjustable protection function and will stop the drive with a fault
May be the better solution for you is to use parameters 32 Supervision (previously known as Limits).
So you can select the supervision parameter (torque or current), limit value and action (fault = will stop the drive). That is a customized limiters !
Kolyo is absolutely right, for the problem you have indicated, the supervision control of the current value, on which the torque depends, can be decisive.
You can also define a relay output or digital output as a result of supervisory control, and time the output if necessary.