Danfoss VLT5000 SyncPos User Manual

187
MG.10.J8.02 – VLT is a registered Danfoss trade mark
Programmable SyncPos motion controller
35 BANDWIDTH (706)
You can limit the bandwidth in which the PID con-
troller should function, for example to avoid the
built-up of a vibration if you are operating a system
which could be jeopardized by vibrations.
However, then it is necessary to enter considerably
higher values for the parameters FFVEL (36) and
FFACC (37) in order to achieve the corresponding
control. A system adjusted in such a manner is not
as dynamic as it could be, but is considerably
more stable and tends to experience less uncon-
trolled vibrations.
Content
Bandwidth within which the PID filter is active
Parameter Group
Axis parameter PID-Controller AXR
CAM-Editor: index card PID
Unit
%
The value 1000 means that the PID filter can out-
put the full command value. For a BANDWIDTH of
500 only 50 % of the set value is output. Thus,
values less than 1000 limit the P-share accordingly.
Value range
0 … 1000 ★ 1000
36 FFVEL (707)
When a control has a limited bandwidth then a
base velocity must be set so that it can be ruled out
that the control will entirely prevent the drive from
running due to the limit set. FFVEL indicates the
value with which the velocity feed-forward is
completed.
When working with a normal PID algorithm the
FFVEL must always be the same as the KDER factor
in order to achieve typical dampening.
Content
Velocity feed-forward
Parameter Group
PID-Controller
Unit
%
Value range
0 … 65000 ★ 0
33 DFLTVEL
DFLTVEL indicates the default velocity which is
always used when no velocity is defined in the pro-
cess set. This value refers to the
Velocity resolu-Velocity resolu-
Velocity resolu-Velocity resolu-
Velocity resolu-
tion tion
tion tion
tion VELRES (22).
Content
Default velocity
Parameter Group
Axis parameter Velocity AXV
CAM-Editor: index card Velocity
Unit
1
/
VELRES;
Standard =
1
/
100
= %
Value range
1 … VELRES ★ 50
34 DFLTACC
DFLTACC indicates the acceleration used when no
explicit statements have been made. This statement
is made in relation to RAMPMIN (31) and refers to
the VELRES (22) parameter.
Content
Default acceleration
Parameter Group
Axis parameter Velocity AXV
CAM-Editor: index card Velocity
Unit
1
/
VELRES;
Standard =
1
/
100
= %
Value range
1 … VELRES ★ 50
Parameter Reference

Danfoss VLT5000 SyncPos Specifications

General

Category	Controller
Frequency	50/60 Hz
Series	VLT5000
Control Method	Vector control
Communication	CANopen
Enclosure Rating	IP20
Storage Temperature	-25°C to 70°C
Altitude	Up to 1000m above sea level
Humidity	5% to 95% (non-condensing)