Device Description HG G-71910-C | English, Revision 03 | Date: 17.09.2019
19
Components and Operation – Chapter 5
5.2.2.1.1 List of System Data that may be Output
A telegram of the serial RS 232 output consists of max. 15 bytes. The minimum up
-
date rate at 9,6 KB is then calculated as follows:
Figure 12
Formula: Minimum update rate
As the transmission is binary, it is possible – when using the 3964R procedure – to
add further (DLE) characters by this procedure.
All multiple- byte variables are output either with the highest byte or the lowest byte
first (adjustable)! The 8 bit check sum is only output when using the transparent pro
-
tocol. It then includes the start character. The start character, as well as the check
sum (transparent protocol) cannot be removed from the data block.
The protocol is adjustable, irrespective of whether telegrams are output permanent
-
ly by an adjustable update rate or whether one transponder is located within the
field.
Table listing the data words of a telegram of 14(15) byte length:
The following table shows a list of the binary codes used to describe the system sta
-
tus (for bytes # 13 and 14 from Table 6):
Table 6
Data words in a telegram of 15 byte length (corresponding to 14 data byte)
Byte # Length Valency
Type
Description
1
1 Byte 0000.0001 unsigned char Start character ASCII-061: „=“
2,3
2 Byte 0000.0002 signed int
Dummy value
4,5,6,7 2 Byte 0000.0004 unsigned long 32 Bit transponder code
8,9
2 Byte 0000.0008 unsigned int
Voltage generated by the transpon
-
der within the frame antenna in
samples
10,11 2 Byte 0000.0010 signed int
Voltage generated by the transpon
-
der within the difference antenna in
samples
12
1 Byte 0000.0020 unsigned char Number of code readings during
the latest transponder crossing
13,14 2 Byte 0000.0040 unsigned int
System status in binary encoding
(15)
1 Byte
unsigned char Check sum, only for transparent
protocol!!
Table 7
Possible system status / error messages (part 1 of 2)
Value Name
Description
0001 DEC_HW_ERROR Decoder hardware error
0002 CODE_CRC_ERR Reception of transponder code with longitudinal parity
error
0004 CODE_PAR_ERR Reception of transponder code with cross parity error
0008 CODE_NIB_ERR
Reception of RW transponder code with High- Nibble
error
0010 EEPROM_ERROR Parameter E² not addressable
0020 PARAM_CRC_ER Parameter block no longer safe
15 Byte
Telegram
--------------- 11 Bit
Byte
------- 9600Bit
s
-----
17 2
ms
Telegram
---------------
,
=
