Glossary Terms - Danfoss VLT5000 SyncPos Operating Instructions Manual

■ ■ ■ ■ ■ Glossary terms
FPGA
Field programmable gate array
Inverted value
notA = /A =
A
L E D
Light Emitting Diode
Master Units [MU]
The curve length or the master cycle length and
other information (e.g. the marker distance) for the
cam control are indicated in master units MU.
A factor (fraction) is used for the conversion into
qc, as with the user unit:
1 MU = SYNCFACTM (49) / SYNCFACTS (50)
MLO NG
For a description which is not dependent on the
version or the hardware, variables were used for
some limit values: thus the value of
MLONG = 1,073,741,824
M t
Master (working) cycle length
MTC10
Motion Control Tool
Quadcounts
The unit defined by the parameter User factor
POSFACT_Z (23) and POSFACT_N (26) is not used
for all path and position parameters. For various
parameters (for example a software limit switch
like I_POSLIMITSW (46) and the parameter
T T T T T olerated position error olerated position error POSERR (15) the quad- olerated position error olerated position error olerated position error
count unit (qc) is valid.
4 quad-counts correspond to one sensor unit
(incremental encoder). In the case of absolute
encoders, the absolute values are returned 1 : 1.
st
sample time = 1 ms
218
Programmable SyncPos motion controller
User units [UU]
The units for the drive or the slave and the master,
respectively, can be defined by the user in any way
desired so that the user can work with meaningful
measurements. The user units and are converted
to quad-counts internally.
In the CAM control, the maximum run distance of
the slave or the slave cycle length are indicated in
User Units UU (qc).
The User Units are standardized with a factor:
Zero impulse
= Index impulse
User factor User factor User factor User factor
1 UU = POSFACT_Z (23) / POSFACT_N (26)
MG. 1 0.J8.02 – VLT is a registered Danfoss trade mark