User Manual

Operation and Programming
Chapter 5
5-23
Parameter 17 -- Accel Frequency Hold
Units = Off/On
Range = 0/1
Factory
Setting =1
To help avoid drive nuisance trips, this parameter enables or disables drive
acceleration during high current conditions.
When set to 0, accel stall protection is off. During drive acceleration,
should drive output current rise above 140% of rated drive output current,
the drive will trip.
When set to 1, accel stall protection is on. During acceleration, the drive
will hold the accel ramp for 60 seconds should drive output current rise
above 140% of rated drive output current. If output current does not fall
below 140% after 60 seconds, the drive will trip.
Parameter 18 -- Decel Frequency Hold
Units = Off/On
Range = 0/1
Factory
Setting =1
To help avoid drive nuisance trips, this parameter enables or disables drive
deceleration during overvoltage conditions.
When set to 0, decel stall protection is off. During drive deceleration,
should drive bus voltage rise above the Over Voltage values listed below,
the drive will trip.
Drive Input Voltage Decel Stall Over Voltage Trip
200/208/230V AC 380V DC 430V DC
380/415/460V AC 760V DC 820V DC
When set to 1, decel stall protection is on. During deceleration, the drive
will hold the decel ramp at one frequency until bus voltage drops below the
Decel Stall values listed above.
Important: If Parameter 18 Decel Frequency Hold is set to 1 (On), an
overhauling load may cause the decel ramp to hold at one frequency for an
extended period. This may cause ramp-to-stop commands to appear to be
non-functional.