Overtorque Detection Settings: L6-01 To L6-06; L6-01/L6-04 Settings; Timing Chart For Overtorque Detection - YASKAWA VARISPEED-616G5 Instruction Manual

7.5.6 Protective Functions: L
7

Overtorque Detection Settings: L6-01 to L6-06

J
User User
Name
Constant
Number
Torque detection
L6-01
selection 1
Torque detection
L6-02
level 1
Torque detection
L6-03
time 1
Torque detection
L6-04
selection 2
Torque detection
L6-05
level 2
Torque detection
L6-06
time 2
The overtorque detection function detects an excessive mechanical load from an increase in the output
D
current (or output torque).
The settings in the torque detection selection constants (L6-01 and L6-04) determine whether overtor-
D
que conditions will be detected and what kind of processing will be performed if a overtorque condi-
tion is detected.

L6-01/L6-04 Settings

D
Setting
0
Overtorque detection disabled
Detect only during speed agree. Continue
1
operation even after detection. (Minor
fault)
Detect overtorque at any time. Continue
2 operation even after detection. (Minor
fault)
Detect only during speed agree. Stop out-
3
put after detection. (Fault
Detect overtorque at any time. Stop output
4
after detection. (Fault)
When overtorque detection is enabled, be sure to set the overtorque detection level (L6-02 or L6-05)
D
and the overtorque detection time (L6-02 or L6-05). An overtorque condition is detected when the cur-
rent exceeds the overtorque detection level for longer than the overtorque detection time.
The overtorque detection level settings depend on the control method:
D
Open-loop or flux vector control: Set as a percentage of the motor rated torque.
•
Normal V/f or V/f with PG feedback control: Set as a percentage of the Inverter rated current.
•
Any of the following functions can be set in a multi-function output (H2-01, H2-02, or H2-03) to indi-
D
cate fact that an overtorque condition has been detected.
S Setting B: Overtorque detection 1 (NO)
S Setting 17: Overtorque detection 1 (NC)
Motor current
(Output torque)
L6-02 or L6-05
Overtorque Detection 1 (N.O.)
or Overtorque Detection 2
(N.O.)
* The overtorque detection is cleared when the current drops about 5% of the
Inverter's rated current (or the motor's rated torque).
Fig 7.51
Change g
during during Setting Setting
Opera- Range
tion
0 to 4
×
0 to 300
×
0.0 to 10.0
×
0 to 4
×
0 to 300
×
0.0 to 10.0
×
Function
)
S Setting 18: Overtorque detection 2 (NO)
S Setting 19: Overtorque detection 2 (NC)
:
L6-03
or
L6-06
ON

Timing Chart for Overtorque Detection

7 - 94
Valid Access Levels
Unit Factory Factory
V/f V/f with
Setting
Control PG
B B
− 0
B B
% 150
B B
s 0.1
A A
− 0
A A
% 150
A A
s 0.1
Display
Overtorque detection 1 Overtorque output 2
"OL3" blinks "OL4" blinks
"OL3" blinks "OL4" blinks
"OL3" lights "OL4" lights
"OL3" lights "OL4" lights
:
L6-03
or
L6-06
ON
Open
Flux
Loop
Vector
Vector
B B
B B
B B
A A
A A
A A