Danfoss MCO 305 Design Manual page 222

MCO 305 Design Guide
33-20 Slave Marker Type
SYNCMTYPS
Option
Encoder Z positive flank
Encoder Z negative flank
External marker positive flank
External marker negative flank
Function
Defines the signal type for the slave marker: index
pulse of the encoder or external marker.
Slave Marker Type is only valid for synchronizations
with marker correction (SYNCM and SYNCCMS) or
if the command MIPOS should be used in the
program.
External slave marker signal: Input 6
SYNCMTYPS supports the following values if
ENCODERTYPE == 9
0 virtual markers are produced with a distance
of ENCODERFREQ.
n2 At positive edge of input n the actual position
is taken as marker position
n3 At negative edge of input n the actual position
is taken as marker position
The accuracy is of course limited to 1 ms which is
the internal update rate.
33-21 Master Marker Tolerance Window
SYNCMWINM
Range [Unit]
0 – par. 33-17
Master Marker Distance
0 = Off
[qc] or in CAM mode [MU]
Function
The Master Marker Tolerance Window shows how
large the permitted tolerance for the occurrence of
the markers is.
With the default setting [0] the window is not mo-
nitored, which means that it is always synchronized
to the next marker even if this has a considerably
larger interval.
At every other setting only those markers are
accepted which are within the window. If there is
no marker within the tolerance window the corres-
ponding flag (SYNCSTAT) is set and no marker
correction takes place. The corresponding other
default setting
222
__ Parameter Reference __
[0]
[1]
[2]
[3]
0
[ ] value for use in communication via serial communication port
®
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marker is also ignored and only corrected the next
time, i.e. no catching up to the next marker.
When SYNCM (or SYNCCSTART) is started the
monitoring only begins when the first marker has
been found.
NB!:
Changes of the parameter will become
active immediately – not only after the
next SYNCM command.
Example
Par. 33-17 Master Marker Distance
Master Marker Tolerance Window
Only one marker within an interval of 29000 to
31000 is accepted.
33-22 Slave Marker Tolerance Window
SYNCMWINS
Range [Unit]
0 – par. 33-18 Slave Marker Distance
0 = Off
[qc] or in CAM mode [UU]
Function
The Slave Marker Tolerance Window SYNCMWINS
shows how large the permitted tolerance for the
occurrence of the markers is.
With the default setting [0] the window is not mo-
nitored, which means that it is always synchronized
to the next marker even if this has a considerably
larger interval.
At every other setting only those markers are
accepted which are within the window. If there is
no marker within the tolerance window the corres-
ponding flag (SYNCSTAT) is set and no marker
correction takes place. The corresponding other
marker is also ignored and only corrected the next
time – i.e. no catching up to the next marker.
When SYNCM (or SYNCCSTART) is started the
monitoring only begins when the first marker has
been found.
NB!:
Changes of the parameter will become
active immediately – not only after the
next SYNCM command.
= 30000
= 1000
0