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System Manual – MOVIDRIVE® compact Drive Inverters
3
Explanation of the parameters
Parameters
P916 Ramp type
This parameter specifies the type of positioning ramp. This influences the speed or ac-
celeration characteristics during positioning.
P917 Ramp mode
Setting range: MODE 1 / MODE 2
Use this parameter to set Positioning ramp 2 P912 with set LINEAR ramp function.
•
P917 = MODE 1: Deceleration for travel to target position (target braking) with Posi-
tioning ramp 2 P912 only. For all other positioning processes, use Positioning ramp
1 P911 .
•
P917 = MODE 2: When changing the travel speed during travel, always use Position-
ing ramp 2 P912 for deceleration. P911 positioning ramp 1 is used for acceleration.
Ramp type
Positioning characteristics
LINEAR
Block-shaped acceleration at an optimum speed.
SQUARED
Softer acceleration and higher torque demand than LINEAR.
SINE
Very soft acceleration profile, required torque higher than with SQUARED accel-
eration profile.
BUS RAMP
Setting for operation of drive inverter with master controller. This controller gen-
erates a cyclical position setpoint that is written directly to the position controller.
The ramp generator is deactivated. The position specifications sent cyclically by
the external controller are interpolated linearly. For configuration, one process
output data word must be set to "position HIGH" and another one to "position
LOW".
JERK-LIMITED (MCH)
Jerk limitation is based on the principle of the linear ramp. For jerk limitation, the
torque and, therefore, the acceleration is trapezoidal to limit the jolting action.
Over time, jerk limitation builds up the torque in linear form during acceleration
until the maximum value is reached. In the same way, the torque is reduced
again over time in linear form to zero. This means that system vibrations can be
virtually avoided. A setting range can be selected from 0.005 ms to 2 ms (P933).
The positioning time in comparison to the linear ramp is extended by the set jerk
time. The acceleration and torque do not increase in comparison with the linear
ramp.
ELECTRONIC CAM
Activating the technology function "Electronic cam."
I SYNCHRONOUS
OPERATION
Activating the technology function "Electronic synchronous operation."
P6..
P60.
P600
Summary of Contents for MOVIDRIVE compact MCH41A
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