Device Description HG G-98780-A | English, Revision 16 | Date: 15.07.2021
20
Chapter 5 – Components and Operation
5.2.6 Interfaces
5.2.6.1 Serial (RS 422 / RS 232)
The serial output may be configured in several ways. The transmission rate is adjust
-
able between 9600 and 19200 Baud, the output protocol may be chosen as “trans
-
parent“ or “3964R“. Apart from that, the content of the telegrams is configurable, as
the user may choose from a list of parameters.
Serial commands are used for activating a system monitor. The crossing of the an
-
tenna´s center axis in direction of travel, is shown by the digital positioning output.
Its transmission time is adjustable in blocks of milliseconds. In addition, it may be re
-
duced to one impulse per crossing.
5.2.6.1.1 List of system data to be output
A telegram consists of max. 15 bytes. The minimum update rate at 9600 Baud is
then calculated as follows
Figure 10
Formula: minimum update rate
As the transmission is binary, it is possible - when using the 3964R procedure - that
further (DLE) characters are added by this procedure. All multiple-byte variables are
output either with the highest byte or the lowest byte first (adjustable)!
The 8 bit check character is only output when using the transparent protocol. It then
includes the start character. The check character (transparent protocol), cannot be
removed from the data block. It is a matter of configuration, whether data telegrams
are output permanently according to the set update rate or only during the period,
when a transponder is within the field.
Table listing the data words of a telegram of 15 byte length:
Table 8
Data words in a telegram of 15 (14) byte length
Byte # Length Priority Type
Description
1
1 Byte 0x01
Unsigned char Start character ASCII-061: „=“
2,3,4,5 4 Byte 0x02
Unsigned long 32 Bit of the Transponder code
6,7
2 Byte 0x04
Unsigned int
Voltage induced by the Transponder
within the frame antenna in Samples
8
1 Byte 0x08
Unsigned char Supply voltage for the antenna [x
100 mV]
9
1 Byte 0x10
Unsigned char Power consumption [x 10 mA]
10
1 Byte 0x20
Signed char
Temperature within the antenna [
o
C]
11,12 2 Byte 0x40
Unsigned int
Number of readings during the latest
transponder crossing
13,14 2 Byte 0x80
Unsigned int
System status in binary encoding
(15)
1 Byte
Unsigned char Check character (EXOR function over
all characters), only for transparent
protocol!
15 Byte
Telegram
--------------- 11 Bit
Byte
------- 9600Bit
s
-----
17 2
ms
Telegram
---------------
,
=
