YASKAWA A1000 Technical Manual page 499


L7: Torque Limit
No. (Addr.) Name
L7-01
Forward Torque Limit
(4A7H)
L7-02
Reverse Torque Limit
(4A8H)
L7-03 Forward Regenerative Torque
(4A9H) Limit
L7-04 Reverse Regenerative Torque
(4AAH) Limit
L7-06 Torque Limit Integral Time
(4ACH) Constant
L7-07 Torque Limit Control Method
(4C9H) Selection during Accel/Decel
L7-16
Torque Limit Process at Start
(44DH)

L8: Drive Protection
No. (Addr.) Name
L8-01 Internal Dynamic Braking Resistor
(4ADH) Protection Selection (ERF type)
L8-02
Overheat Alarm Level
(4AEH)
L8-03 Overheat Pre-Alarm Operation
(4AFH) Selection
L8-05 Input Phase Loss Protection
(4B1H) Selection
L8-07 Output Phase Loss Protection
(4B3H) Selection
L8-09 Output Ground Fault Detection
(4B5H) Selection
L8-10 Heatsink Cooling Fan Operation
(4B6H) Selection
L8-11 Heatsink Cooling Fan Off Delay
(4B7H) Time
L8-12
Ambient Temperature Setting
(4B8H)
YASKAWA ELECTRIC SIEP C710616 27G YASKAWA AC Drive A1000 Technical Manual
V/f V/f w/PG
OLV/PM AOLV/PM
Sets the torque limit value as a percentage of the motor rated torque. Four individual quadrants
can be set.
Output Torque
L7-04
Regeneration
REV
L7-02
V/f V/f w/PG
OLV/PM AOLV/PM
Sets the integral time constant for the torque limit.
V/f V/f w/PG
OLV/PM AOLV/PM
0: Proportional control (changes to integral control at constant speed). Use this setting when
acceleration to the desired speed should take precedence over the torque limit.
1: Integral control. Set L7-07 to 1 if the torque limit should take precedence.
V/f V/f w/PG
OLV/PM AOLV/PM
0: Disabled
1: Enabled
All Modes
0: Resistor overheat protection disabled
1: Resistor overheat protection enabled
Note: This parameter is not available in models CIMR-A4A0930 and 4A1200.
All Modes
An overheat alarm will occur if the heatsink temperature exceeds the level set in L8-02.
All Modes
0: Ramp to stop. A fault is triggered.
1: Coast to stop. A fault is triggered.
2: Fast Stop. Decelerate to stop using the deceleration time in C1-09. A fault is triggered.
3: Continue operation. An alarm is triggered.
4: Continue operation at reduced speed as set in L8-19.
All Modes
Selects the detection of input current phase loss, power supply voltage imbalance, or main
circuit electrolytic capacitor deterioration.
0: Disabled
1: Enabled
All Modes
0: Disabled
1: Enabled (triggered by a single phase loss)
2: Enabled (triggered when two phases are lost)
All Modes
0: Disabled
1: Enabled
All Modes
0: Run with timer (Fan operates only during run and for L8-11 seconds after stop.)
1: Run always (Cooling fan operates whenever the drive is powered up.)
All Modes
Sets a delay time to shut off the cooling fan after the Run command is removed when L8-10 = 0.
All Modes
Enter the ambient temperature. This value adjusts the oL2 detection level.
Description
OLV CLV
CLV/PM
Positive Torque
L7-01
Motor
-1
min
FWD
Regeneration
L7-03
Negative Torque
OLV CLV
CLV/PM
OLV CLV
CLV/PM
OLV CLV
CLV/PM
Description
B.3 Parameter Table
Setting Page
Default: 200%
Min: 0% 294
Max: 300%
Default: 200%
Min: 0% 294
Max: 300%
Default: 200%
Min: 0% 294
Max: 300%
Default: 200%
Min: 0% 294
Max: 300%
Default: 200 ms
Min: 5 ms 294
Max: 10000 ms
Default: 0
Min: 0 295
Max: 1
Default: 1
Min: 0 295
Max: 1
Setting Page
Default: 0
Min: 0 295
Max: 1

Default:
<6>
Min: 50C 295
Max: 150C
Default: 3
Min: 0 296
Max: 4
Default: 1
Min: 0 297
Max: 1
Default: 0
Min: 0 297
Max: 2

Default:
<6>
Min: 0 297
Max: 1
Default: 0
Min: 0 297
Max: 1
Default: 60 s
Min: 0 s 298
Max: 300 s
Default: 40C
Min: -10C 298
Max: 50C
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