Overcurrent Stall Prevention Function (Parameter P16); Overvoltage Stall Prevention Function (Parameter P17); Skip Frequencies 1 To 3 (Parameter P18 And P20) And Skip Frequency Band Width (Parameter P21) - Panasonic AAD03011 Instruction Manual

Note:1. A frequency higher than the upper frequency clamp (parameter P29) cannot
be output.
2. If a general-purpose motor with a rated frequency of 50 or 60Hz is run at a
frequency exceeding the rated frequency, the motor may be damaged. Always
set the frequency to match the motor characteristics.
3. If the base frequency must be changed together with the max. output frequency
for a high-speed exclusive motor, etc., change parameter P15.
4. When running a general-purpose motor with a frequency higher than the commercial
frequency, the base frequency will be set to the normal motor's rated output
frequency(50 or 60Hz).
5. When using the general-purpose motor at a level higher than the base frequency
(normally 50 or 60Hz), the motor will enter the rated output characteristics, and the
generated torque will drop in inverse proportion to the frequency.
OVERCURRENT STALL PREVENTION FUNCTION(Parameter P16)
When the set acceleration time is too short for the inertial load, this parameter can
be used to temporarily reduce the acceleration rate to prevent an overcurrent trip.
Function details
Setting data
Stall prevention
0
function disabled
Stall prevention
1
function enabled

OVERVOLTAGE STALL PREVENTION FUNCTION (Parameter P17)

When the set deceleration time is too short for the inertial load, this parameter
can be used to temporarily reduce the deceleration rate to prevent an overvoltage trip.
Function details
Setting data
Stall prevention
0
function disabled
Stall prevention
1
function enabled
Note1) When using the regenerative brakes with the inverter with brakes, set the setting data to "0".
(The regenerative brake function will not be activate with the factory setting "1".)
Note2) The specifications of the inverter built-in brakes are as follow. Consider these carefully
before starting use. Note that the brake resistor and inverter could be damaged if the
specifications are exceeded.
1)Braking torque: 100% 2)Maximum duty factor (%ED): 2% 3)Maximum working time: 3s
SKIP FREQUENCIES 1 to 3(Parameter P18 to P20) and
SKIP FREQUENCY BAND WIDTH (Parameter P21)
If the load mechanism resonates at a specific inverter output frequency, a continuous
operation in that frequency band can be avoided by setting the skip frequency and
the skip frequency band.
Up to three skip frequencies can be set, and the skip frequency band can be set between
1 and 10Hz.
Note) The level that the stall prevention
functions at can be set with parameter
P33 (OCS level).
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