Check Sum - TR-Electronic C 58 Serie Benutzerhandbuch

TRWinProg Parameterization: C_58, CE_58 – 13 bit resolution
Example 2
Measuring system:
-
-
-
MSB
1 2
0 0 0
Number of revolutions

5.2.1.3 Check sum

The selection "check sum" causes that the measuring system transmits its data in
TR-SSI-format:
•
•
MSB
Number of revolutions
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.
As receive devices (SSI master) serve TR application modules, e.g. the "AK-41" axis
cassette.
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.
 TR-Electronic GmbH 2005, All Rights Reserved
Page 78 of 107
(related to 32 clocks)
1024 steps/revolution (10 bits)
512 revolutions (9 bits)
--> Total number of steps = 19 bits, this corresponds to 19 data bits
3 4 – 12
18 10
P 2 – P 2
Number of steps per revolution
28 data bits without SSI special bits in binary code (MSB bit first)
Number of revolutions = 12 bits, Number of steps per revolutions = 16 bits,
-
this corresponds to a max. total measuring length of 65536
steps/revolution x 4096 revolutions
15 check sum bits (MSB bit first)
1 – 12
27 16
P 2 – P 2
12 bit
TR - ECE - BA - DGB - 0039 - 14
13 – 22
9 0
P 2 – P 2
13 – 28
15 0
P 2 – P 2
16 bit
Number of steps per revolution
23 24 25 26 27 28 29 30 31 32
S1 S2 S3 S4 S5 S6 S7 S8 0 0
29 – 43
14
CRC 2 – CRC 2
15 bit
TR Check sum
Printed in the Federal Republic of Germany
07/30/2020
LSB
LSB
0