Number Of Data Bits; Transmit Code; Negative Values - TR-Electronic C 58 Serie Benutzerhandbuch

5.2.2 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 "Tree format no" and "26-bit + repeat"
the position of the 2
In case of the transmission formats "Tree format yes" and "Check sum" the
Number of data bits required for the programmed Total number of steps
must be typed in exactly.
lower limit
upper limit
default
Restrictions in case of following SSI-formats
-
-

5.2.3 Transmit code

Selection
Binary
Gray
BCD

5.2.4 Negative values

Selection
Complement
Sign + value
With negative numbers, the most significant position bit, which is used as the sign, is
set in both forms of representation. So that the number range isn't limited thereby, an
additional data bit is needed. The following table compares the complement
representation and signed representation for binary and BCD code with 16 bits:
Value
2
1
0
-1
-2
-3
Printed in the Federal Republic of Germany
07/30/2020
0
-position bit to the MSB-bit is defined.
8
32
24
Check sum:
26-bit + repeat:
Description
SSI output code = Binary
SSI output code = Gray
SSI output code = BCD
Description
–Max. value/2 to +Max. value/2 – 1
Sign=1 Max. value/2 – 1 to Sign=0 Max. value/2 – 1
Binary + Complement
0x0002
0x0001
0x0000
0xFFFF
0xFFFE
0xFFFD
TR - ECE - BA - DGB - 0039 - 14
max. number of data bits ≤ 28
max. number of data bits ≤ 26
Binary + Sign BCD + Complement
0x0002
0x0001
0x0000
0x8001
0x8002
0x8003
Default
Default
BCD + Sign
0x0002 0x0002
0x0001 0x0001
0x0000 0x0000
0x9999 0x8001
0x9998 0x8002
0x9997 0x8003
 TR-Electronic GmbH 2005, All Rights Reserved
Page 81 of 107
X
X