P018: Overcurrent Stall Prevention Function; P019: Overvoltage Stall Prevention Function - Panasonic VF100 Instruction Manual

P018£ºOvercurrent stall prevention function
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.
Data setting value
0
1
[Overcurrent trip prevention function]
When value is set to "1" and heavy current flows in the inverter during the low-speed operation,
this function may temporarily stop output. When current decreases, output will be restarted.
But in 3.7kW inverter, if carrier frequency is set to "10kHz", overcurrent trip prevention function
is invalid.When the load is changed suddenly or the inverter is accelerated or decelerated rapidly,
instantaneous flow of heavy current may lead to trip sometimes.
Note
•EThe level that the stall prevention functions at can be set with parameter "P021: OSC level ".
•EWhen "P020: Current limit function" is already set, overcurrent trip prevention function still applies.
P019£ºOvervoltage stall prevention function
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.
Data setting value
0
1
Note
•E
When using the regenerative brakes with the inverter with brakes, set the setting data to "0".
(The regenerative brake function will not activate with the factory setting "1".)
•E
When using regenerative brakes, make sure to use the dedicated brake resistor of our company.
•E
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): 5% (3) Maximum working time: 5s
•E
Only brake circuit is built in 3-phase 400V input type. Always use the dedicated options of
our company for brake resistor.
Detail
Stall prevention function disabled
Stall prevention function enabled
Detail
Stall prevention function disabled
Stall prevention function enabled
Related
P021
parameters
73