Components and Operation
English, Revision 06, Date: 14.12.2016
17
4.2.4
Interfaces
4.2.4.1
Serial (RS 232 or RS422)
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 either
“transparent“ or “3964 R“ (see also sections B on page 47 and C on page 49). 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 anten-
nas 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 pulse per crossing.
4.2.4.1.1
List of System Data that may be Output
A telegram of the serial output consists of max. 21 bytes. The minimum update 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 put out ei-
ther with the highest byte or the lowest byte first (adjustable)!
The 8 bit check sum is only output when using the transparent protocol. It then in-
cludes 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, irrespec-
tive of whether telegrams are output permanently by an adjustable updaterate or
whether one transponder is located within the field.
Table listing the data words of a telegram of 21 byte length:
Byte #
Length
Valency
Type
Description
1
1 Byte
0x0000.0001
unsigned char
Start character ASCII-061: „=“
2,3
2 Byte
0x0000.0002
signed int
contant 0, Dummy entry
4,5
2 Byte
0x0000.0004
unsigned int
the upper 16 bits of the transponder code (or
depending on the configuration the lower 16
Bit, see Figure 18 on page 33).
6,7
2 Byte
0x0000.0008
unsigned int
the lower 16 bits of the transponder code (or
the upper 16 Bit, explanation see above)
Table 5
Data words in a telegramm of 21 byte length (Section 1 of 2)
21
Byte
Telegram
-------------------------
11
Bit
Byte
------------
9600
Bit
s
-------
24 1
ms
Telegram
-------------------------
=
