Device Description HG G-71450/1/3/5-A | English, Revision 02 | Date: 06.06.2019
33
Interfaces: Profibus (HG G
-
71451) – Chapter 6
3.
Reading of the antenna with 3 input bytes (Table 23) and transponder program
-
ming with 3 output bytes (Table 25)
The output bytes have to be used according to the following table:
6.3 Status and Command Bits
6.4 Transponder Programming
The sequence of a transponder programming via the Profibus interface is described
in section 10.3.2 on page 64.
Table 25
HG G-71451: Structure of the 3 Profibus output bytes
Byte #
Length Type
Sequence
Meaning
1
2 Byte
unsigned int
Lo Byte
Transponder code that
is to be programmed
2
Hi Byte
3
1 Byte
unsigned char
Command bit (accord
-
ing to Table 27 below)
Table 26
HG G-71451: Meaning of the status bits
Priority
Name Meaning
Comments
0x01
Currently not used
By means of status bit DATA
and CD it is possible to deter
-
mine, wheter a transponder is
located below the antenna. If
both bits are set, transponder
data is received at a sufficient
level. The bits are not set
within the blanking interval. At
an unprogrammed transpon
-
der or if interferences occur
the CD bit will be set only.
0x02
CLR
Reflects the status of the
CLR-instructions (see also
Table 27 on page 33)
0x04
0x08
0x10
Currently not used
0x20
DATA Set according to the
Data LED
0x40
CD
Set according to the
CD LED
0x80
POS
Set according to the
Pos LED
Table 27
HG G-71451: Meaning of the command bits
Priority
Name
Meaning
0x01
PROG
Transponder programming (see section 10.3.2 on
page 64)
0x02
CLR
Internal deletion of the last transponder code *)
0x04
0x08
0x10
0x20
0x40
0x80
Currently not used
*) The last stored transponder code is „deleted“. Then, after a change of direction,
a transponder with the same code can trigger a positioning pulse again.