L7: Torque Limit; L8: Drive Protection - YASKAWA A1000 Technical Manual

No.
(Addr. Name
Hex)
L6-09 Mechanical Weakening
(469) Detection Speed Level
L6-10 Mechanical Weakening
(46A) Detection Time
L6-11 Mechanical Weakening
(46B) Detection Start Time
u

L7: Torque Limit

No.
(Addr. Name
Hex)
L7-01
Forward Torque Limit
(4A7)
L7-02
Reverse Torque Limit
(4A8)
L7-03 Forward Regenerative
(4A9) Torque Limit
L7-04 Reverse Regenerative
(4AA) Torque Limit
L7-06 Torque Limit Integral Time
(4AC) Constant
Torque Limit Control
L7-07
Method Selection during
(4C9)
Accel/Decel
u

L8: Drive Protection

No.
(Addr. Name
Hex)
Internal Dynamic Braking
L8-01
Resistor Protection
(4AD)
Selection (ERF type)
L8-02
Overheat Alarm Level
(4AE)
L8-03 Overheat Pre-Alarm
(4AF) Operation Selection
L8-05 Input Phase Loss Protection
(4B1) Selection
L8-07 Output Phase Loss
(4B3) Protection Selection
L8-09 Output Ground Fault
(4B5) Detection Selection
YASKAWA ELECTRIC TOEP C710616 41B YASKAWA AC Drive - A1000 Quick Start Guide
Description
Sets the speed that triggers Mechanical Weakening Detection. When L6-08 is
set for an unsigned value, the absolute value is used if the setting is negative.
Sets the time mechanical weakening has to be detected before an alarm or fault
is triggered.
Sets the operation time (U1-04) required before Mechanical Weakening
Detection is active.
Description
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
Sets the integral time constant for the torque limit.
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.
Description
0: Resistor overheat protection disabled
1: Resistor overheat protection enabled
Note: This parameter is not available in models CIMR-Ao4A0930 and
4A1200.
An overheat alarm occurs when heatsink temperature exceeds the L8-02 level. Default:
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.
Selects the detection of input current phase loss, power supply voltage
imbalance, or main circuit electrolytic capacitor deterioration.
0: Disabled
1: Enabled
0: Disabled
1: Enabled (triggered by a single phase loss)
2: Enabled (triggered when two phases are lost)
0: Disabled
1: Enabled
Positive Torque
L7-01
Motor
r/min
FWD
Regeneration
L7-03
Negative Torque
B.8 L: Protection Function
Values Page
Default: 110.0%
Min.: -110.0
Max.: 110.0
Default: 0.1 s
Min.: 0.0
Max.: 10.0
Default: 0
Min.: 0
Max.: 65535
Values Page
Default: 200%
Min.: 0 114
Max.: 300
Default: 200%
Min.: 0 114
Max.: 300
Default: 200%
Min.: 0 114
Max.: 300
Default: 200%
Min.: 0 114
Max.: 300
Default: 200 ms
Min: 5
Max: 10000
Default: 0
Range: 0, 1
Values Page
Default: 0
Range: 0, 1
<1>
Min.: 50 °C
Max.: 150 °C
Default: 3
Range: 0 to 4
Default: 1
Range: 0, 1
Default: 1
Range: 0 to 2
<1>
Default:
Range: 0, 1
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