Operating Instructions
COMPAX-M / -S
External position localization with position adjustment
136
8.5.4 External position localization with position adjustment
The external position localization with position adjustment described below is only
available in the standard unit (COMPAX XX00). Solutions adapted to specific
applications are available in the unit variants.
A slip between motor position and the position of the drive (e.g. a material feed) is
not detected. If the slip is too large, the external position can be entered(e.g.
recorded by a measuring wheel) using encoder channel 1. In this way, COMPAX
corrects the internal actual position value.
To limit access to the position adjustment, use P36 to limit the speed correction
value resulting from the difference in positions.
This can be especially useful in the acceleration phase, if the material is slipping
through because of the higher correction speed.
To avoid all inaccuracies during internal calculations, it is important to use the
measuring unit "Increments".
Para-
meter
Meaning
valid
from..
P75
Maximum permitted measuring error (difference between resolver
position and encoder position)
The external position adjustment is enabled using measuring
error P75 > 0.
When P75 is reached, error E15 is generated and the drive is
switched off.
Control position adjustment via digital input I11
If the external position measurement and position adjustment
(P75>0) is switched off, position adjustment operation can be
switched on and off using input I11. For this, assign I11 with this
function via P232=4.
I11="0": External position adjustment switched off (reaction time
approx. 5 ms).
I11="1": External position adjustment switched on.
P232 becomes effective immediately and has a default value of 0.
If P232=0, I11 will not have an effect on the position adjustment;
this is then switched on and off using P75.
Note!
If P232=4 (activated I11), I11 can no longer be used for
GOTO / GOSUB EXT.
VP
P36
Limitation of speed correction value for external position
adjustment (only available in COMPAX XX00 and COMPAX XX30)
"0": switched off (default value)
When P36=0, the speed correction value is not limited.
P36 is specified in % of the nominal speed (P104).
Note! When position localization is switched off, P36 must = 0!
VP
P144
Sets encoder channel 1
="4": without external position localization
="6": external position localization switched on via channel 1.
VC
P143
Number of encoder pulses per encoder rotation from channel 1;
range: 120...2 000 000.
VC
P98
Travel of load per encoder rotation units (corresp. to P90).
VC
Only available in
COMPAX XX00!
Recommendation:
Configuring the
external position
adjustment:
