Detecting Motor Torque - YASKAWA Varispeed G7 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, P2-PC, P3-C3, or P4-C4.
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 H2-05 (multi-function output terminals M1-M2, P1-PC, P2-
PC, P3-C3, and P4-C4 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
Name
Con-
stant
Display
Number
Torque detec- 0: Overtorque/undertorque
tion selection 1
1: Overtorque detection only
2: Overtorque detected
3: Overtorque detection only
4: Overtorque detected
L6-01
Torq Det 1 Sel
5: Undertorque detection only
6: Undertorque detected
7: Undertorque detection only
8: Undertorque detected
Torque detec- Open-loop vector control: Motor
tion level 1 rated torque is set as 100%.
L6-02
V/f control: Inverter rated current
Torq Det 1 Lvl
is set as 100%.
Setting
Description
Range
detection disabled.
with speed agreement;
operation continues after
overtorque (warning).
continuously during
operation; operation continues
after overtorque (warning).
with speed agreement; output
stopped upon detection
(protected operation).
continuously during
operation; output stopped
upon detection (protected
0 to 8
operation).
with speed agreement;
operation continues after
overtorque (warning).
continuously during
operation; operation continues
after overtorque (warning).
with speed agreement; output
stopped upon detection
(protected operation).
continuously during
operation; output stopped
upon detection (protected
operation).
0 to
300
Control Methods
Change
Open
Factory during
V/f
Loop
Setting Opera-
V/f with
Vector
tion
PG
1
0 No A A A
150% No A A A
Machine Protection
MEMO
Open
BUS
Flux
Loop
Regis-
Vec-
Vector
ter
tor
2
A A 4A1H
A A 4A2H
53
6-