Danfoss VLT5000 SyncPos Operating Instructions Manual page 196

56 SYNCREADY
SYNCREADY defines how often during a marker
synchronization (SYNCM and SYNCCMM) a
synchronization evaluation with ACCURACY must
be completed with accuracy so that ready is
fulfilled.
ACCURACY is checked during every correction. If
ACCURACY is fulfilled then 1 is added until the
set marker number has been achieved.
Synchronization evaluation is always executed after
n marker pulses by the master SYNCMARKM (52).
ACCURACY and READY can be queried using
SYNCSTAT.
Content
Number of markers for READY
Parameter Group
Axis parameter Synchronization AXS
CAM-Editor: index card Synchron.
Value range
0 ... 65535
57 SYNCFAULT
Defines how often during a marker synchronization
(SYNCM and SYNCCMM) an inaccuracy may occur
during a synchronization evaluation before a FAULT
is registered.
In the program this condition can be queried using
SYNCSTAT.
Content
Marker number for fault
Parameter Group
Axis parameter synchronization AXS
Value range
0 ... 65535
MG.10.J8.02 – VLT is a registered Danfoss trade mark
Programmable SyncPos motion controller
58 SYNCMPULSM
SYNCMPULSM indicates how many qc (master) lie
between two master markers.
If you use the encoder index impulse as a marker
signal, then the distance between two markers is
the resolution (qc) of the encoder.
If external marker signals are used, then it is pos-
sible to measure the marker distance with the
program "marker count" (refer to program sample
in Chapter 7), if it is unknown.
SYNCMPULSM is only valid for synchronization
with marker correction (and SYNCCMM).
In a CAM synchronization, the distance of the sensor
to the working position in MU will be indicated
instead of the distance between two master markers.
(The distance is brought about automatically by the
master cycle length (Mt))
If the parameter is larger than one master cycle
length (Mt), a marker-FIFO register will be created
automatically for the handling of the marker
correction.
★ 1
Content
Distance between two master markers
or in CAM-Mode the distance between sensor and
working position
Parameter Group
Axis parameter Synchronization AXS
CAM-Editor: index card Synchron.
Unit
q c
in CAM mode: MU
Value range
0 ... 2 * MLONG / ( SYNCMARKM(52) *
SYNCFACTS(50) * n )
whereby
n = number of the marker, which can be between
master and slave, when the slave tries to
★ 10
catch up with the master when starting.
★ 500
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