Yaskawa L1000E AC Drive Technical Manual for CIMR-LE Models for Elevator Applications - Manual (Page 217)

5.8 L: Protection Functions
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■ L1-04: Motor Overheat Fault Operation Selection (PTC thermistor input)
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)
Applies a filter on the PTC thermistor input signal to prevent inadvertent motor overheat faults.
◆ 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.
■ L3-01: Stall Prevention Selection during Acceleration
Stall Prevention during acceleration (L3-01) prevents tripping with overcurrent (oC), motor overload (oL1), or drive
overload (oL2) faults common when accelerating with heavy loads.
L3-01 determines the type of Stall Prevention the drive uses during acceleration.
Setting 0: Disabled
No Stall Prevention is provided. If the acceleration time is too short, the drive may not be able to get the motor up to speed
fast enough, causing an overload fault.
Setting 1: Enabled
Enables Stall Prevention during acceleration.
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.
<1> Values shown are specific to 200 V class drives; double the values for 400 V class drives.
Parameter Name Setting Range Default
L2-05 <1> Undervoltage Detection Level 150 to 210 Vdc Determined by E1-01
No. Parameter Name Setting Range Default
L3-01 Stall Prevention Selection during Acceleration 0 to 2 1