Acceleration And Deceleration Time; Set To Suit The Motor - Toshiba TOSVERT VF-AS3 Instruction Manual

4. 1. 4
■ Process type
■ Dancer control
Set the acceleration time [ACC] and deceleration time [dEC] to short for quick response.
But excessively small setting causes inverter trip.
Refer to 4.3.5 If you can not set acceleration and deceleration time to short.
■ Speed type
■ Easy positioning
Speed PID control and Easy positioning PID control set the acceleration time and the deceleration time to the
smallest automatically regardless of parameter [ACC], [dEC] setting.
Note1) Adjust each gain in case that the inverter trips. If you need to extend acceleration time and the
deceleration time, select the process type PID control.
4
4. 2
Set only the parameters necessary for the motors.
These parameters are valid for actual output frequency as a result of PID control.
Title
FH
9
UL
LL
F240
F241
F243
F270 to
F275
Note 1) Note that the inverter may run and stop frequently when setting large value for [F241].
4. Setting for PID control

Acceleration and deceleration time

Set to suit the motor

Parameter name
Maximum • Set the maximum frequency of the output frequency.
• This is the basis of the acceleration time [ACC] and deceleration time
frequency
[dEC].
Acceleration time [ACC]: time from 0Hz to [FH]
Deceleration time [dEC]: time from [FH] to 0Hz
Upper limit
• This is the upper limit of output frequency.
frequency
Lower limit
• This is the lower limit of output frequency.
frequency
Start frequency • The inverter outputs frequency of [F240] immediately.
• It is useful for quick response of starting torque.
Run frequency
• The inverter operates (Run/Stop) by [F241] setting frequency.
End frequency • The inverter decelerate then the output frequency is dropped to 0Hz at the
frequency set by [F243].
Jump frequency 1
• Set the jump frequency to avoid (jump) resonance of the machinery.
to 3
Description
4-10
E6582112
VF-AS3