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TR-Electronic GmbH 2018, All Rights Reserved
03/19/2021
TR-ECE-BA-DGB-0141 v03
Page 55 of 67
5.2 SSI
5.2.1 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
"26-bit +
repeat"
the position of the 2
0
-position bit to the MSB-bit is defined.
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
6
upper limit
63
default
24
Restrictions in case of following SSI-formats
-
Check sum: max. number of data bits
28
-
26-bit + repeat: max. number of data bits
26
5.2.2 Transmit code
Selection
Description
Default
Binary
SSI output code = Binary
Gray
SSI output code = Gray
X
BCD
SSI output code = BCD
5.2.3 SSI-Mono-Time
lower limit
9 μs
upper limit
41 μs
default
20 μs
5.2.4 Format
5.2.4.1 No special format
No special format = default setting
A synchronous-serial data transmission with
No special format
is min. 8 bits, or
max. 36 bits long. The data transmission begins with the most significant bit (MSB)
and contains the position bits (P).
Related to a certain number of clocks, the data can be shifted arbitrarily by the
parameter
Number of data bits
. The data can be transmitted right-justified or
left-justified, with leading "zeros" and without leading "zeros". Leading "zeros" are
produced if the parameter
Number of data bits
is programmed larger, as it would
be necessary from the total measuring length.