Lenze EVS9332xP - Manual (Page 69)

Function library
Positioning control
3.4.5 Absolute value encoder
3−41
l
EDSVS9332P−EXT DE 2.0
Example for the adaptation of the encoder resolution:
Gearbox between encoder and drive i = 30
Effective wheel diameter d = 50 mm
Position resolution of the measuring system A
meas
= 8 inc/mm
Internal position resolution (fix) A
internal
= 65536 inc/rev
Position resolution of the measuring system (with regard to motor side):
Ax
mess
+
(A
mess
@ d @ )
i
+
ǒ8 incńmm @ 50 mm @ 3, 14Ǔ
30
p
Ax
mess
+ 41, 87 incńrev
Adaptation factor for CONVPHPH2:
C0473ń4
C0473ń5
+
A
intern
Ax
mess
+
65536incńrev
41, 87incńrev
C0473ń4
C0473ń5
+ 1565
1
l Read the absolute value at POS−ABS−IN under consideration of the setpoint polarity (C1206)
and the actual value polarity (C1208).
l The actual home position" (C1220/8) is then added and the actual home offset" (C1220/7) is
subtracted.
l The actual home position" is set equal to C1227 if POS−ABS−SET = HIGH during initialisation
(switch on).
Tip!
The display values under C1220/5 and C1221/5 only correspond to the absolute value of the encoder
read when using the absolute value encoder through X8!