6-56
îš‹ 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.
îš„Related Constants
Con-
stant
Number
Name Description
Setting
Range
Factory
Setting
Change
during
Opera-
tion
Control Methods
MEMO
BUS
Regis-
ter
V/f
V/f
with
PG
Open
Loop
Vec-
tor
Flux
Vec-
tor
L6-01
Torque detec-
tion selection
1
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).
0 to 8 0 No A A A A 4A1H
L6-02
Torque detec-
tion level 1
Open loop vector control: Motor
rated torque is set as 100%.
V/f control: Inverter rated cur-
rent is set as 100%.
0 to 300 150% No A A A A 4A2H
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