Parameterization via TRWinProg
TR-Electronic GmbH 2018, All Rights Reserved
Printed in the Federal Republic of Germany
Page 58 of 67
TR-ECE-BA-DGB-0141 v03
03/19/2021
5.2.4.3 Check sum
The selection
"check sum"
causes that the measuring system transmits its data in
TR-SSI-format:
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)
MSB
LSB
1
– 12
13
– 28
29
– 43
P 2
27
– P 2
16
P 2
15
– P 2
0
CRC 2
14
– CRC 2
0
12 bit
Number of revolutions
16 bit
Number of steps per revolution
15 bit
TR Check sum
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.
Programmings < 12 bits for the
Number of revolutions
produce leading "zeros",
Programmings < 16 bits for the
Number of steps per revolution
produce
added "zeros".
The
Number of data bits
required for the programmed
Total number of steps
must be typed in exactly.
As transmission code
Binary
must be selected.
Example
Measuring system:
-
4096 steps/revolution (12 bits)
-
1024 revolutions (10 bits)
-
--> Total number of steps = 22 bits, this corresponds to 22 data bits
-
Code: Binary
MSB
LSB
1
2
3
– 12
13
– 24
25 26 27 28
29
– 43
0
0
P 2
21
– P 2
12
P 2
11
– P 2
0
0 0 0 0
CRC 2
14
– CRC 2
0
12 bit
Number of revolutions
16 bit
Number of steps per revolution
15 bit
TR Check sum
