Operating Instructions COMPAX-M / -SExternal position localization with position adjustment1368.5.4 External position localization with position adjustmentThe external position localization with position adjustment described below is onlyavailable in the standard unit (COMPAX XX00). Solutions adapted to specificapplications are available in the unit variants.A slip between motor position and the position of the drive (e.g. a material feed) isnot 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, COMPAXcorrects the internal actual position value.To limit access to the position adjustment, use P36 to limit the speed correctionvalue resulting from the difference in positions.This can be especially useful in the acceleration phase, if the material is slippingthrough because of the higher correction speed.To avoid all inaccuracies during internal calculations, it is important to use themeasuring unit "Increments".Para-meterMeaning validfrom..P75 Maximum permitted measuring error (difference between resolverposition and encoder position)The external position adjustment is enabled using measuringerror P75 > 0.When P75 is reached, error E15 is generated and the drive isswitched off.Control position adjustment via digital input I11If the external position measurement and position adjustment(P75>0) is switched off, position adjustment operation can beswitched on and off using input I11. For this, assign I11 with thisfunction via P232=4.I11="0": External position adjustment switched off (reaction timeapprox. 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 forGOTO / GOSUB EXT.VPP36 Limitation of speed correction value for external positionadjustment (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!VPP144 Sets encoder channel 1="4": without external position localization="6": external position localization switched on via channel 1.VCP143 Number of encoder pulses per encoder rotation from channel 1;range: 120...2 000 000.VCP98 Travel of load per encoder rotation units (corresp. to P90). VCOnly available inCOMPAX XX00!Recommendation:Configuring theexternal positionadjustment:
