Danfoss VLT5000 SyncPos, Руководство по эксплуатации

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Programmable SyncPos motion controller
MG.10.J8.02 – VLT is a registered Danfoss trade mark
174
2 E NCODER
The parameter
Encoder count per re Encoder count per re
Encoder count per re Encoder count per re Encoder count per revolution
volution
volution volution volution
contains the position feedback transmitter of the
actual encoder (incremental or absolute encoder) in
relation to one encoder revolution.
The number of quad-counts (qc) per revolution is
calculated from this information. Quadcounts are the
basic units for all path measurements. Quadcounts
are generated by extracting of all edges of the A and
B tracks. One encoder count corresponds to four
quad-counts. In the case of absolute encoders, the
absolute values are returned 1 : 1.
The number of quad-counts per revolution is needed
for the index pulse search during the reference drive
and for the conversion of velocity and acceleration
to internal units.....
The Encoder counts per re Encoder counts per re Encoder counts per re Encoder counts per re Encoder counts per revolution volution volution volution volution also supplies
information whether during a HOME or INDEX move-
ment the index signal has been missed. If more than
a complete revolution is executed without registering
an index signal then the corresponding error
message will be made.
Content
Encoder counts per revolution
Parameter Group
Axis parameter Encoder AXE
CAM-Editor: index card Encoder
Unit
counts/revolution
Value range
1 … MLONG
★
500
NB!
No negative values are allowed. Whether
index pulses are being used or not is entered
in the parameter HOMETYPE (40).
Limit values
In order to guarantee perfect functioning of the
SyncPos option the product of the
Encoder counts Encoder counts
Encoder counts Encoder counts Encoder counts
per re per re per re per re per revolution volution volution volution volution ENCODER (2) and the Maximum Maximum Maximum Maximum Maximum
velocit velocit velocit velocit velocity y y y y in encoder revolution/sec of the limit
frequency of the encoder input level (220 kHz) may
not be exceeded.
ENCODER * VELMAX
[
Encoder revolution
/
sec
]
≤
220 kHz
3 HOME_FORCE
If this parameter is set to yes = 1, then movement to
the home position must be completed before any
other positioning movement can be completed.
For a motion command that is not executed with a
terminated home run the error O.ERR_6 is triggered.
Content
Forced movement to home position
Parameter Group
Axis parameter Home AXH
CAM-Editor: index card Home
Value range
0; 1
★
0
0 = Homerun is not forced.
After being turned on the current position is
valid as the real index point
1 = Homerun is forced.
After turning on the VLT and after changing axis
parameters a forced tracking of the home
position must be made before a motion com-
mand is executed directly or by the program.
Internally the parameters can also contain the value
255, which indicates that a forced tracking of the
HOME position is necessary and has already taken
place.
NB!
For safety reasons and to avoid false positio-
ning the parameter should always be set to 1
and thus forcing tracking of the home position.
However, in this case it is necessary to consider that
all programs must complete a HOME command
before the first motion command in order to receive
perfect functioning.
Parameter Reference