Danfoss MCO 305 Design Manual page 103

MCO 305 Design Guide
CURVEPOS
Summary
Syntax
Return Value
Description
Command Group
Cross Index
Syntax Example
Sample
__ Software Reference __
Retrieve slave curve position that corresponds to the current master position of
the curve.
res = CURVEPOS
res = Slave position in CAM units (UU) absolute to the current zero point.
CURVEPOS returns the slave value which corresponds to the actual curve master
position.
The position can be retrieved independently of the operating status (position
control at standstill, positioning procedure, velocity control or synchronization).
CMASTERCPOS (SYSVAR) and CURVEPOS are now updated even if SYNCC is no
longer active. The update of these values starts after a SETCURVE command (if
par. 33-23 Start Behavior for Sync is < 2000) or after SYNCC and the first master
marker (if par. 33-23 = 2000).
After the SYNCC command is stopped, we continue to update these values if Start
Behavior for Sync. < 2000.
NB!:
The position is only defined if a SETCURVE has been set before.
NB!:
If a temporary zero point exists which has been set with SET ORIGIN and is
active, the position value will refer to this zero point.
NB!:
DEFMCPOS and DEFMORIGIN can still modify this position.
CAM
APOS, DEF ORIGIN, SET ORIGIN, POSA, POSR, DEFMCPOS,
Parameters: 33-10 Syncfactor Master, 33-11 Syncfactor Slave
PRINT CURVEPOS // print actual slave position of the curve
Fix points of a curve:
Master Slave
0 0
500 500
700 300
1000 1200
Say the current master position is 800. Then the CURVEPOS returns the corres-
ponding slave position of 450.
Case 1: Current Master Position is 800 and current slave position is 200.
CURVEPOS will return the value 450.
Case 2: Current Master Position is 800 and current slave position is 700.
CURVEPOS will return the value 450.
Hence CURVEPOS is independent of the slave position.
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