TR-Electronic 110 Series - Number of Data Bits; Transmit Code

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07/30/2020 TR - ECE - BA - DGB - 0039 - 14 Page 103 of 107
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
8.2.2 Number of data bits
The parameter Number of data bits defines the number of reserved bits for the
measuring system position. Special bits are not contained in it and will be output after
the data bits.
Thereby in the transmission format "No special format" and "Repeat with
1-3 low clocks" the position of the 2
0
-position bit to the MSB-bit is defined.
In case of the transmission format "Check sum 28…" the Number of data bits
required for the programmed Total number of steps must be typed in exactly.
lower limit 8
upper limit 36
default
24
Restrictions in case of following SSI-formats
- Check sum: max. number of data bits ≤ 28
8.2.3 Transmit code
Selection
Description
Default
Binary SSI output code = Binary X
Gray SSI output code = Gray