WEG CFW300 V1.3X, Programming Manual

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Functions Common to All the Control Modes
CFW300 | 11-1
11
11 FUNCTIONS COMMON TO ALL THE CONTROL MODES
This chapter describes the functions common to the inverter V/f and V VW control modes, but which interferes
in the drive performance.
11.1 RAMPS
The inverter ramp functions allow the motor to accelerate or decelerate faster or slower. They are adjusted by
parameters that define the linear acceleration time between zero and the maximum frequency (P134) and the time
for a linear deceleration from the maximum frequency zero.
In the CFW300, three ramps with different functions were implemented:
„
1
st
Ramp - standard for most functions.
„
2
nd
Ramp - it may be activated by the user, according to the drive requirement, by means of the inverter
command word or by a digital input.
„
Emergency Ramp - it is used for the inverter internal protection functions, such as: current limitation, DC link
regulation, etc. The Emergency Ramp has priority over the other ramps.
NOTE!
The setting with too short ramp time may cause overcurrent in the output (F070), undervoltage (F021)
or overvoltage (F022) of the DC link.
P100 - Acceleration Time
Adjustable
Range:
0.1 to 999.9 s
Factory
Setting:
5.0 s
Properties:
Description:
Acceleration time from zero to maximum frequency (P134).
P101 - Deceleration Time
Adjustable
Range:
0.1 to 999.9 s
Factory
Setting:
10.0 s
Properties:
Description:
Deceleration time from maximum frequency (P134) to zero.
P102 - Acceleration Time 2
nd
Ramp
Adjustable
Range:
0.1 to 999.9 s
Factory
Setting:
5.0 s
Properties:
Description:
Acceleration time from zero to maximum frequency (P134) when the 2
nd
Ramp is active.