Magnet In Damping Zone; Output Ssi + Checksum (Optional) - TR-Electronic LMRS_27 Interface-Box SSI Gesamt-Bedienungsanleitung

TRWinProg Parameterization

5.2.7 Magnet in damping zone

Defines the position value output if the magnet is in the damping zone.
Selection
Old value
0xffffff
0x000000

5.2.8 Output SSI + checksum (optional)

Selection
direct
scaled
The selection "Output with checksum" causes that the measuring system
transmits its data in TR-SSI-format:


The transmission format with check sum works with a "Hamming Distance" of 6 and
recognizes up to 5 errors per code word. Moreover, interrupted clock- or data-lines in
the receiver device can be recognized.
Because of high immunity to disturbance with this transmission format, this technology
is used e.g. in areas with strong electro smog and long connection lines.
Example
Measuring system:
MSB
1 2
0 0
 TR-Electronic GmbH 2014, All Rights Reserved
Page 50 of 55
Description
in the damping zone the last valid measuring value is output
in the damping zone the position value „16777215" is output
in the damping zone the position value „0" is output
Description
0.01 mm resolution
Scaling according to the adjusted measuring length in steps
(see "Measuring length in steps" on page 44)
28 data bits without SSI special bits in binary code (MSB bit first)
24 data bits are reserved for the output of the position (measuring length in
-
steps). Following the output of the position, three 0-bits and a 1-bit follow to
keep the data frame of 28 bits
15 check sum bits (MSB bit first)
Resolution: 0,001 mm
Measuring length: 4 m
-->Measuring length in steps: 4 000 000
--> Total measuring length: 22 bits
Code: Binary
3 – 24
21
– P 2
P 2
28 bit measuring length in steps
TR - ELA - BA - DGB - 0022 - 09
25 26 27 28
0
0 0 0 1
LSB
29 – 43
14 0
– CRC 2
CRC 2
15 bit TR Check sum
Printed in the Federal Republic of Germany
12/09/2019