11.11 L: Protection Functions
548 YASKAWA SIEPC71061705H GA700 Series Technical Manual
11.11 L: Protection Functions
◆ L1: Motor Protection
No.
(Hex.)
Name Description
Default
(Range)
Ref.
L1-01
(0480)
Motor Overload (oL1)
Protection
Sets the motor overload protection with electronic thermal protectors.
0 : Disable
1 : Variable Torque
2 : Constant Torque 10:1 Speed Range
3 : Constant Torque 100:1 SpeedRange
4 : PM Variable Torque
5 : PM Constant Torque
6 : Variable Torque (50Hz)
Note:
When only one motor is connected to a drive, set L1-01 = 1 to 6 [Enabled].
External thermal relays are not necessary in these conditions.
Determined by A1-02
(0 - 6)
261
L1-02
(0481)
Motor Overload
Protection Time
Sets the operation time for the electronic thermal protector of the drive to prevent
damage to the motor. Usually it is not necessary to change this setting.
1.0 min
(0.1 - 5.0 min)
263
L1-03
(0482)
Motor Thermistor oH
Alarm Select
Sets drive operation when the PTC input signal entered into the drive is at the oH3
[Motor Overheat Alarm] detection level.
0 : Ramp to Stop
1 : Coast to Stop
2 : Fast Stop (Use C1-09)
3 : Alarm Only
3
(0 - 3)
264
L1-04
(0483)
Motor Thermistor oH
Fault Select
Sets the drive operation when the PTC input signal to the drive is at the oH4 [Motor
Overheat Fault (PTC Input)] detection level.
0 : Ramp to Stop
1 : Coast to Stop
2 : Fast Stop (Use C1-09)
1
(0 - 2)
264
L1-05
(0484)
Motor Thermistor Filter
Time
Sets the primary delay time constant for the PTC input signal entered to the drive. This
parameter prevents accidental motor overheat faults.
0.20 s
(0.00 - 10.00 s)
876
L1-08
(1103)
oL1 Current Level
Sets the reference current for the motor 1 thermal overload detection. When the current
level > 0.0 A, you cannot set this value < 10% of drive rated current.
0.0 A
(0.0 A or 10% to 150%
of the drive rated
current)
876
L1-09
(1104)
oL1 Current Level for
Motor 2
Sets the reference current for the motor 2 thermal overload detection. When the current
level > 0.0 A, you cannot set this value < 10% of drive rated current.
0.0 A
(0.0 A or 10 to150% of
the drive rated current)
876
L1-13
(046D)
Motor Overload Memory
Selection
Sets the function that keeps the current electronic thermal protector value when the
drive stops receiving power.
0 : Disabled
1 : Enabled
1
(0, 1)
876
◆ L2: Power Loss Ride Through
No.
(Hex.)
Name Description
Default
(Range)
Ref.
L2-01
(0485)
Power Loss Ride
Through Select
Sets the drive operation after a momentary power loss.
0 : Disable
1 : Enabled
2 : Enabled while CPU Power Active
3 : Kinetic Energy Backup: L2-02
4 : Kinetic Energy Backup: CPU Power
5 : Kinetic Energy Backup: DecelStop
Note:
When the CPU is inactive, b1-17 [Run Command at Power Up] sets operation at
power up.
0
(0 - 5)
881
L2-02
(0486)
Power Loss Ride
Through Time
Sets the maximum time that the drive will wait until trying to restart after power loss.
Determined by o2-04,
C6-01
(0.0 - 25.5 s)
883
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