Parameters
04/10 MN04020001Z-EN
90
PNU ID Access right
RUN
Value Description Factory setting
(P1.3)
P6.7 505 - Start function 0
0 Ramp (acceleration)
The acceleration time with the value set at parameter P6.5.
1 Flying restart circuit
Starting on a running motor. By switching on a small current value,
a small torque is created.
With a frequency search (beginning with the maximum frequency
P6.4), the correct rotational field frequency is determined. The
output frequency is then adapted to the specified setpoint
frequency based on the defined acceleration (P6.5) and
deceleration (P6.6) times.
You should use this function if the motor is already turning at the
start command, with flow-machines (pumps, fans) and with short
interruptions in input voltage for instance.
P6.8 506 - Stop function 0
0 Free coasting
The motor carries out an uncontrolled stop (coasting) after the sart
enable (FWD/REV) is switched off or when the STOP button (P6.16)
is actuated.
1 Ramp (deceleration) = dynamic braking.
Deceleration time with the value set under P6.6.
If the energy that is fed back by the motor during the dynamic
braking is too high, the deceleration time has to be extended. On
devices with internal braking transistors, the excess energy can be
dispelled through an external braking resistance (optional)
(see Section “Braking (P12)”, page 116).
P6.9 500 - Wave form, time-based S-form 0.0
0.0 Linear acceleration and deceleration time based on P6.5 and P6.6.
0.1 -
10.0 s
Time-graded transition to start and end of the acceleration ramp
(P6.5) and deceleration ramp (P6.6).
The time set here applies for both ramps (see figure 81).
Figure 81: S-formed curve for acceleration and deceleration ramps
P6.4
P6.3
P6.6
P6.9P6.9
f
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