Lenze 8400 TopLine - Manual (Page 336)

6 Encoder/feedback system
6.3 Multi-Encoder (X8)
336
Lenze · 8400 TopLine · Reference manual · DMS 6.0 EN · 06/2014 · TD05/TD14
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _
6.3.2.6 Configuration example 2: Distance sensor "DME5000-117" by SICK
Data
from DME5000 operating instructions (8009813/US35/2012-07-02):
• Maximum distance: 70 m
• Default setting of parameter "Period Length": 1 mm
(4 zero crossings while passing one period * 0.25 mm = 1 mm)
• Default setting of parameter "Resolution": 125 μm (must not be changed)
These default settings result in the following resolutions:
• 1 "encoder revolution" = 10 mm
• Hiperface resolution: 1/32 mm  320 digits per "revolution" x 7000 "revolutions"
• Sin/cos resolution: 10 increments per "revolution"
(1 period ≡ 1 mm  10 mm ≡ one "revolution" = 10 periods or increments)
• 1 [unit] = 1 mm
Scaling of the position value
In order to scale the evaluation of the SinCos track, the traverse path in [units] has to be entered in
C01111/3 which is covered in order to pass through once the SinCos increment of the encoder
( C00420/3 ) (here 10 increments x 1 mm period length = 10 mm).
The absolute Hiperface track is scaled by the setting of the "steps per revolution" in C00494/2 . Here,
a revolution is equated to the path which corresponds to the SinCos number of increments of the
encoder ( C00420/3 ).
Required settings
Period Length (mm) Type code Resolution RS-485 (mm) Resolution sin/cos when zero crossings are counted (mm)
1 90h 1/32 0.25
2 91h 1/16 0.5
4 92h 1/8 1
8 93h 1/4 2
16 94h 1/2 4
Parameter Info Setting for example
C00494/1 Hiperface: Number of revolutions 7000
C00494/2 Hiperface: Steps per revolution 320
C01110 LS_MultiEncoder: Solid measure 1: linearly unipolar
C00420/3 LS_MultiEncoder: Encoder increment 10
C01111/3 LS_MultiEncoder: Traverse path - encoder increment 10