Danfoss MCO 305, Руководство по конструкции, Страница: 203 / 242

MCO 305 Design Guide
__ Parameter Reference __
¾ default setting [ ] value for use in communication via serial communication port
MG.33.L4.02 – VLT
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203
33-30 Maximum Marker Correction
SYNCMMAXCORR
Range [Unit]
0 – MLONG [qc]
0 = Off, i.e. no limit
¾ 0
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
¾ Standard [0]
Look ahead [1]
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.
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.