Detecting Motor Torque - YASKAWA CIMR-F7A Instruction 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 M1-M2, P1-PC, or P2-PC.
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 H2-03 (multi-function output terminals M1-M2, P1-PC, and
P2-PC function selection).
The overtorque/undertorque detection level is the current level (Inverter rated output current 100%) in V/f
control, and the motor torque (motor rated torque 100%) in vector control.
Related Constants
Con-
stant
Number
Torque detec-
L6-01 tion selection
1
Torque detec-
L6-02
tion level 1
-56
6
Name Description
0: Overtorque/undertorque
detection disabled.
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
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).
Open loop vector control: Motor
rated torque is set as 100%.
V/f control: Inverter rated cur-
rent is set as 100%.
Control Methods
Change
Setting Factory during
Range Setting Opera-
V/f
tion
0 to 8 0 No A
0 to 300 150% No A
MEMO
Open
BUS
V/f Flux
Loop
Regis-
with Vec-
Vec-
ter
PG tor
tor
A A A 4A1H
A A A 4A2H