5.8 L: Protection Functions
YASKAWA ELECTRIC SIEP C710616 38F YASKAWA AC Drive - L1000A Technical Manual 227
■ L1-04: Motor Overheat Fault Operation Selection (PTC thermistor input)
Note: Available in drive software PRG: 7017 or later.
Sets the drive operation when the PTC thermistor input signal reaches the motor overheat fault level (oH4).
Setting 0: Ramp to stop
The drive stops the motor using the deceleration time 1 set in parameter C1-02.
Setting 1: Coast to Stop
The drive output is switched off and the motor coasts to stop.
Setting 2: Emergency Stop (Fast Stop)
The drive stops the motor using the deceleration time set in parameter C1-09.
■
L1-05: Motor Temperature Input Filter Time (PTC thermistor input)
Note: Available in drive software PRG: 7017 or later.
Applies a filter on the PTC thermistor input signal to prevent inadvertent motor overheat faults.
■
L1-13: Continuous Electrothermal Operation Selection
Determines whether to hold the current value of the electrothermal motor protection (L1-01) when the power supply is
interrupted.
Setting 0: Disabled
Setting 1: Enabled
◆ L2: Undervoltage Detection
■ L2-05: Undervoltage Detection Level (Uv)
Determines the voltage at which a Uv1 fault is triggered. This setting rarely needs to be changed.
Note: Install an AC reactor option on the input side of the power supply when setting L2-05 below the default value to prevent damage
to drive circuitry.
◆ L3: Stall Prevention
When the load is too heavy or acceleration ramps are too short, the motor may be unable to keep up with the speed
reference, resulting in excessive slip. During acceleration, this usually causes an overcurrent fault (oC), drive overload
(oL2), or motor overload (oL1). The drive can prevent the motor from stalling and still reach the desired speed without
the user needing to change the acceleration or deceleration ramp settings. The Stall Prevention function can be set
separately for acceleration, operating at constant speeds, and deceleration.
No. Parameter Name Setting Range Default
L1-04 Motor Overheat Fault Operation Selection (PTC thermistor input) 0 to 2 1
No. Parameter Name Setting Range Default
L1-05 Motor Temperature Input Filter Time (PTC thermistor input) 0.00 to 10.00 s 0.20 s
No. Parameter Name Setting Range Default
L1-13 Continuous Electrothermal Operation Selection 0 or 1 1
No.
<1> Values shown are specific to 200 V class drives; double the values for 400 V class drives. Multiply value by 2.875 for 600 V class drives.
Parameter Name Setting Range Default
L2-05
<1>
Undervoltage Detection Level 150 to 210 Vdc Determined by E1-01
SIEP_C710616_38F_5_0.book 227 ページ ２０１５年１１月９日 月曜日 午後３時３６分
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