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Siemens SINUMERIK 840C Installation Instructions

Siemens SINUMERIK 840C
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12 Functional Descriptions 04.96
12.11.2 ENDAT absolute encoder (SW 5.2 and higher)
Example:
Position controller resolution = 0.5 10
-4
mm
Displayed actual position = 140.0000
Positive travel direction
Reference point approach is not possible!
1st step Enter 40.0000 mm in NC MD 396*, absolute offset, and set NC MD 1808*, bits
1 and 3.
2nd step After POWER ON, an actual position of 0.0001 is displayed.
3rd step Reset NC-MD 1808*, bit 3, absolute offset valid.
4th step Execute reference point approach.
Ascertaining the offset without the reference point encoder
•
There is no reference point cam or BERO present.
•
NC MD 1808* bit 0: axis with absolute encoder is set (absolute encoder present).
The machine is traversed to the position that the machine manufacturer regards as the
reference point manually in ”JOG” or ”Incremental” mode.
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Calculation of the absolute value encoder:
Machine system = absolute encoder value + absolute offset
or
Absolute offset = machine system - absolute encoder value
Where:
• Machine system = required absolute position = reference point value
• Absolute encoder value = displayed absolute position (actual value) with
”Absolute offset invalid”
The calculated absolute offset must be entered in MD 396* and be made valid by setting MD
1808*, bit 3. After the next control start-up, the displayed actual position, the machine system
actual position and the status signal ”Reference point reached” are set.
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For set-up without reference point encoder,
the customer must take care of the overflow handling.
12–88
© Siemens AG 1992 All Rights Reserved 6FC5197- AA50
SINUMERIK 840C (IA)

Table of Contents

Other manuals for Siemens SINUMERIK 840C

Preview: User Guide
User Guide291 pages
Preview: Diagnostics Guide
Diagnostics Guide260 pages
Preview: Operator's Guide
Operator's Guide301 pages
Preview: Installation Guide
Installation Guide189 pages
Preview: Planning Guide
Planning Guide375 pages

Questions and Answers:

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Siemens SINUMERIK 840C Specifications

General IconGeneral
BrandSiemens
ModelSINUMERIK 840C
CategoryControl Unit
LanguageEnglish

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