Detecting Motor Torque - YASKAWA FSDrive-MV1S Instructions Manual

Detecting Motor Torque

If an excessive load is placed on the machinery (overtorque) or the load is suddenly lightened (undertorque),
you can output an alarm signal to multi-function output terminal DO1 to DO8.
To use the overtorque/undertorque detection function, set B, 17, 18, 19 (overtorque/undertorque detection NO/
NC) in one of the following constants: H2-01 to H2-08 (multi-function output terminals DO1 to DO8 function
selection).
The overtorque/undertorque detection level is the motor torque (motor rated torque 100%) in vector control.
Related Constants
Constant
Number
L6-01
L6-02
-28
6
Name
Description
Display
Overtorque/ 0: Overtorque/undertorque
Undertorque detection detection disabled.
selection 1 1: Overtorque detection only
with speed agreement;
operation continues after
overtorque (warning).
2: Overtorque detected
continuously during
operation; operation
continues after overtorque
(warning).
3: Overtorque detection only
with speed agreement;
output stopped upon
detection (protected
operation).
4: Overtorque detected
continuously during
operation; output stopped
upon detection (protected
operation).
5: Undertorque detection only
Torq Det 1 Sel
with speed agreement;
operation continues after
overtorque (warning).
6: Undertorque detected
continuously during
operation; operation
continues after overtorque
(warning).
7: Undertorque detection only
with speed agreement;
output stopped upon
detection (protected
operation).
8: Undertorque detected
continuously during
operation; output stopped
upon detection (protected
operation).
Overtorque/
Open-loop vector control:
Undertorque detection
Motor rated torque is set as
level 1
100%.
Torq Det 1 Lvl
Change
Setting Factory
during
Open-
Range Setting
Operation
loop
Vector
0 to 8 0 No
0 to
150% No
300
Control
Methods
MEMOBUS
Register
Flux
Vector
A A 550H
A A 551H