Check Sum 28 After 25-28 Data Bits - TR-Electronic C 58 Serie Benutzerhandbuch

TRWinProg Parameterization: CO_58 / C_H80 / C_H110

8.2.1.6 Check sum 28 after 25-28 data bits

The selection "Check sum 28 after 25-28 data bits" causes that the
measuring system transmits its data in TR-SSI-format:
•
•
Example of the protocol structure for the selection Check sum 28 after 28 data bits:
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.
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Page 102 of 107
28 data bits in binary code (MSB bit first)
Check sum 28 after 25 data bits:
-
Number of revolutions = 12 bits, Number of steps per revolutions = 13 bits,
this corresponds to a max. total measuring length of
8192 steps/revolution x 4096 revolutions. After output of the position 3
zero bits are attached, in order to keep the data frame of 28 bits.
Check sum 28 after 26 data bits:
-
Number of revolutions = 12 bits, Number of steps per revolutions = 14 bits,
this corresponds to a max. total measuring length of
16384 steps/revolution x 4096 revolutions. After output of the position 2
zero bits are attached, in order to keep the data frame of 28 bits.
Check sum 28 after 27 data bits:
-
Number of revolutions = 12 bits, Number of steps per revolutions = 15 bits,
this corresponds to a max. total measuring length of
32768 steps/revolution x 4096 revolutions. After output of the position 1
zero bit is attached, in order to keep the data frame of 28 bits.
Check sum 28 after 28 data bits:
-
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 – 28
15 0
P 2 – P 2
16 bit
Number of steps per revolution
LSB
29 – 43
14 0
CRC 2 – CRC 2
15 bit
TR Check sum
Printed in the Federal Republic of Germany
07/30/2020