Lenze 9400 - Manual (Page 256)

6 Encoder evaluation
6.3 Parameter setting
256
Lenze · Servo-Inverter 9400 HighLine · Reference manual · DMS 10.0 EN · 11/2013 · TD05/06
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Example: Position encoder feedback with an SSI linear distance measuring device
The current position of a positioning unit is detected with a laser distance measuring device (e.g.
»DME5000«) with an SSI interface. A graduation of 0.1 mm has been parameterised in the linear
distance measuring device.
The positioning unit is moved by 848.23 mm in an axial direction for each revolution of the slip-free
drive roll. The current motor speed is detected by a resolver.
A position offset of 100 mm must be taken into account due to installation of the distance
measuring device and the reflector.
The lower 24 bits of the SSI data word contain information coded in Gray.
[6-11] Schematic diagram of feedback with laser distance measuring device DME5000
The Multiturn resolution (C05274) that is set must allow the entire traversing range of the
application to be represented and must also ensure that the display limit in the 9400 device is not
exceeded.
• Minimum Multiturn resolution.
C05274 = Maximum traversing range / feed constant = 59
• Maximum Multiturn resolution
C05274 = 2 31 -1 / resolution of Singleturn = 253181
Required FB interconnection
 Motor encoder
 Laser distance measuring device
 Feed rate of the screw
 Laser beam/reflective surface
 Circumference of the drive roll = 848,23 mm
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