Parameter List
10
10.11 L: Protection Functions
YASKAWA SIEPC71061723A YASKAWA AC Drive CR700 Technical Manual 515
10.11 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
6 : Variable Torque (50Hz)
Note:
When you connect only one motor to a drive, set L1-01 = 1 to 3 or 6 [Enabled].
External thermal relays are not necessary in these conditions.
Determined by A1-02
(0 - 3, 6)
289
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)
291
L1-03
(0482)
Motor Thermistor oH
Alarm Select
Sets the drive operation when the PTC input signal to the drive is at the oH3 [Motor
Overheat (PTC Input)] detection level.
0 : Ramp to Stop
1 : Coast to Stop
2 : Fast Stop (Use C1-09)
3 : Alarm Only
3
(0 - 3)
291
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)
292
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)
749
L1-08
(1103)
oL1 Current Level
Sets the reference current for the motor 1 thermal overload detection.
Note:
When the current level > 0.0 A, you cannot set this value < 10% of drive rated
current.
0.0A
(0.0 A or 10% to 150%
of the drive rated
current)
749
L1-09
(1104)
oL1 Current Level for
Motor 2
Sets the reference current for the motor 2 thermal overload detection.
Note:
When the current level > 0.0 A, you cannot set this value < 10% of drive rated
current.
0.0A
(0.0 A or 10 to150% of
the drive rated current)
749
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)
750
◆ L2: Power Loss Ride Through
No.
(Hex.)
Name Description
Default
(Range)
Ref.
L2-03
(0487)
Minimum Baseblock
Time
Sets the minimum time to continue the drive output block (baseblock) after a baseblock.
Determined by o2-04
(0.1 - 5.0 s)
750
L2-05
(0489)
Undervoltage Detection
Lvl (Uv1)
Sets the voltage at which a Uv1 [DC Bus Undervoltage] fault is triggered. Usually it is
not necessary to change this setting.
NOTICE: Damage to Equipment. When you set this parameter
to a value lower than the default, you must install an AC
reactor on the input side of the power supply. If you do not
install an AC reactor, it will cause damage to the drive circuitry.
Determined by E1-01
(Determined by E1-01)
750
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