■
Reference ramping
Acceleration and deceleration ramping times can be set individually for speed and
torque reference.
With a speed reference, the ramps are defined as the time it takes for the drive to
accelerate or decelerate between zero speed and the value defined by parameter
. The user can switch between two preset ramp sets using a binary source
such as a digital input. For speed reference, also the shape of the ramp can be
controlled.
With a torque reference, the ramps are defined as the time it takes for the reference
to change between zero and nominal motor torque (parameter
).
Special acceleration/deceleration ramps
The acceleration/deceleration times for the jogging function can be defined
separately; see section
A deceleration ramp can be defined for emergency stop (“Off3” mode).
Settings and diagnostics
Parameters:
•
Speed reference ramping:
and
.
•
Torque reference ramping:
1.30 Nominal torque scale (page 136)
,
and
26.19 Torque ramp down time (page 299)
•
Jogging:
23.20 Acc time jogging (page 273)
and
23.21 Dec time jogging (page 273)
•
Emergency stop (“Off3” mode):
23.23 Emergency stop time (page 273)
■
Constant speeds
Constant speeds are predefined references that can be quickly activated, for
example, through digital inputs. It is possible to define up to 7 constant speeds
for speed control.
WARNING!
Constant speeds override the normal reference irrespective of where the
reference is coming from.
The constant speeds function operates on a 2 ms time level.
Settings and diagnostics
Parameter groups:
22 Speed reference selection (page 263)
.
78 Program features
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