Danfoss MCO 305 Design Manual page 203

MCO 305 Design Guide
33-30 Maximum Marker Correction
SYNCMMAXCORR
Range [Unit]
0 – MLONG [qc]
0 = Off, i.e. no limit
Function
SYNCMMAXCORR is used to limit the maximum
correction done by marker correction. The value is
given in qc (slave). This is working with SYNCM
and SYNCC.
After the PFG_G_KORREKTUR is calculated, the
PFG_G_KORREST is set to the minimum of
G_Korrektur or SYNCMMAXCORR. This value will
then be used for correction.
NB!:
If you have set par. 33-29 Filter Time for
Marker Correction or par. 33-26 Velocity
Filte r (negative), this correction will be
spread over a certain time, depending on these
factors.
33-31 Synchronization Type
SYNCTYPE
Option
Standard
Look ahead
Function
The way how synchronization is done can be
changed:
0 = The actual master position is compared with
the future slave position (where slave will be in
1 ms).
1 = The actual master position is compared with
actual commanded position.
In the standard case (SYNCTYPE=0) the position
difference is eliminated.
That means, that the actual master position (where
master is now) is compared with the future slave
position (where slave will be in 1 ms). Thus it will
always drive behind the master, as long as no
INTEGRAL is used.
If SYNCTYPE = 1 is selected the system compares
actual master position with actual commanded
position. That means, that the system will try to
make this zero, no matter how PID is set.
default setting
__ Parameter Reference __
0
[0]
[1]
[ ] value for use in communication via serial communication port
®
MG.33.L4.02 – VLT is a registered Danfoss trademark
NB!:
Be aware, that SYNCERR equals to actual
(new) master command position minus
actual position of the slave plus pending
errors of filtering and pending corrections.
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