Danfoss VLT5000 SyncPos Operating Instructions Manual page 178

9 VE LMAXQC
VELMAXQC determines the Maximum velocit
statements made with the assistance of VELRES
(22) refer to this speed. The sample time is 1 ms.
VELMAXQC is an internal parameter which cannot
be changed. It is automatically calculated from
VELMAX (1) which the user enters in Rpm. These
internal values are decisive for the permitted value
range. However, in practice these limit values are of
no importance since they exceed the encoder input
frequency determined by the hardware by far.
Content
Maximum velocity
Parameter Group
Axis parameter velocity AXV
CAM-Editor: index card velocity
Unit
qc/ms * 1/65536
Value range
1 ... MLONG
MG.10.J8.02 – VLT is a registered Danfoss trade mark
Maximum velocit Maximum velocit Maximum velocity y y y y . All Maximum velocit
Programmable SyncPos motion controller
10 ACCMAXQC
ACCMAXQC determines the maximum acceleration.
This is the amount of time the drive needs with a
connected load to achieve the maximum rotation.
All other statements made with the assistance of the
scaling VELRES (22) refer to this acceleration.
This internal parameter – which cannot be changed
– is automatically calculated from RAMPMIN (31),
which the user enters in ms. These internal values
are decisive for the value range permitted. However,
in practice these limit values are of no importance.
Content
Maximum acceleration
Parameter Group
Velocity
Unit
2
qc/(ms) * 1/65536
Value range
1 ... MLONG
NB!
If a starting time is entered which is too short,
which under the existing mechanical condi-
tions causes non-achievable acceleration, usually a
position error will occur.
11 KPROP (702)
The Proportional factor Proportional factor Proportional factor Proportional factor KPROP indicates the linear
Proportional factor
correction factor with which the deviation between
the current set and actual position is evaluated and
a corresponding correction of the motor torque is
made.
Rule of Thumb:
KPROP greater = Drive will become 'stiffer'
KPROP too high = Tendency to overswing
Content
Proportional value for PID control
Parameter Group
Axis parameter PID-Controller AXR
CAM-Editor: index card PID
Value range
1 ... 65000
★ 30
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