L7: Torque Limit; L8: Drive Protection - YASKAWA FSDrive-MV1000 Parameter Manual

1.3 Parameter Table
No.
Name
(Addr.)
L7-01 Forward Torque
(4A7H) Limit
L7-02 Reverse Torque
(4A8H) Limit
Forward
L7-03
Regenerative Torque
(4A9H)
Limit
Reverse
L7-04
Regenerative Torque
(4AAH)
Limit
Torque Limit
L7-06
Integral Time
(4ACH)
Constant
Torque Limit
L7-07 Control Method
(4C9H) Selection during
Accel/Decel
L7-16 Torque Limit
(44DH) Process at Start
Regenerative Torque
L7-30
Limit Mode
(1FDH)
Selection
Low Speed
L7-32 Regenerative Torque
(313AH) Limit Mode
Selection
L8-02 Overheat Alarm
(4AEH) Level
L8-03 Overheat Pre-Alarm
(4AFH) Operation Selection
68

L7: Torque Limit

V/f OLV
Sets the torque limit value as a percentage of the motor rated torque.
Four individual quadrants can be set.
L7-04
Regeneration
REV
L7-02
V/f OLV
Sets the integral time constant for the torque limit. Increase the setting for
faster torque limit response.
V/f
OLV
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
OLV
0: A delay time is disabled
1: A delay time is enabled
V/f OLV
Sets the mode for the regenerative torque limit.
0: Standard mode (torque limits entered from all analog inputs and through
communications effective)
1: Independent mode (only the torque limits set with L7-03, L7-04, and
regenerative torque limit effective (H3-
V/f OLV
Sets the mode for the regenerative torque limit when the motor speed is 10%
or less.
0: Follows the torque limit value.
1: Lowers the lower limits for the regenerative torque limit when the motor
speed is 10% or less.
Note: This parameter is available from the drive software
version S0104 and later.

L8: Drive Protection

All Modes
An overheat pre-alarm will occur if the thermistor temperature exceeds the
level set in L8-02.
All Modes
0: Ramp to stop. A fault is triggered.
1: Coast to stop
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.
Note: 0 to 2 are recognized as faults, and 3 and 4 as alarms.
Description
CLV
Output Torque
Positive Torque
L7-01
Motor
r/min
FWD
Regeneration
L7-03
Negative Torque
CLV
CLV
CLV
CLV
= 12))
CLV
YASKAWA ELECTRIC TOEP C710687 03B FSDrive-MV1000 Parameter Guide
Setting
Default: 100%
common
Min: 0%
Max: 300%
Default: 100%
Min: 0%
Max: 300%
Default: 1%
Min: 0%
Max: 300%
Default: 1%
Min: 0%
Max: 300%
Default: 200 ms
common
Min: 5 ms
Max: 10000 ms
common
Default: 0
Min: 0
Max: 1
Default: 1
common
Min: 0
Max: 1
common
Default: 0
Min: 0
Max: 1
common
Default: 1
Min: 0
Max: 1
common_ Default:
<6>
Min: 50°C
Max: 150°C
common_
Default: 3
Min: 0
Max: 4
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