Elmomc SimplIQ Servo Drives Composer User Manual Manuel d'utilisateur télécharger pdf (Page 17)

• Absolute Single Turn Position Resolution–a drop down menu that represents, in

terms of bits, single-turn feedback cycle. The number of counts would be 2^number

of bits. This value is practically the digital absolute resolution derived from the

feedback and can be read from the encoder data sheet. Sine/cosine resolution

improves this value but is derived from firmware manipulation. The value can be

read from the encoder data sheet.

• Absolute Multi-Turn Position Resolution– a drop down menu that represents, in

term of bits, the multi-turn feedback resolution. The number of full mechanical

resolution without loosing the origin (absolute position) is 2^number of bits turns.

• Sine/Cosine Periods per Revolution– a drop down menu that represents the

number of sine/cosine signal cycles per mechanical revolution. After the absolute

position is determined by the SimplIQ drive (typically after power up), the position

is calculated from the sine/cosine signals and the “Multiplication Factor”.

Note:

The following should apply:

1. SINGLE-TURN + MULTI-TURN ≤ 32 bit resolution

2. SINGLE-TURN ≤ 32 and MULTI-TURN ≤ 16 bit resolutions

By clicking on the “Next” button, the “Commutation Feedback Parameter II”

window will appear. The Composer updates the drive with the relevant

commutation and feedback parameters needed.

• Multiplication Factor – is a drop down list that represents, in term of bits, the

number of position counts in one cycle of the analog (Sine\Cosine) signal. The

limitation for the multiplication factor are:

For rotary motors:

FactortionMultiplica

TURNMULTI

∗+

≤

)12(

Where:

Composer User Manual Using the Wizard

MAN-COMPUM (Ver. 1.9)

2-9

1 2 ... 12 13 14 15 16 17 18 19 20 21 22 ... 100 101

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Elmomc SimplIQ Servo Drives Composer User Manual Manuel d'utilisateur Page 17