Input Buffer - Balluff BIS U-6026-034-104-06-ST35 Betriebsanleitung

BIS U-6026-034-1_4-06-ST35
Processor unit
8
Device function (continued)
8.1.3

Input buffer

The input buffer is used to send the data read by the
identification system, the designations and the status
codes to the controlling system.
Bit No.
7
Subaddress
00 = 1st bit string BB HF TO AN AF AE AA TP
hex
01
hex
02
hex
...
Last byte
BB HF TO AN AF AE AA TP
= 2nd bit string
Configuration and explanation (input buffer)
Sub- Bit Meaning
address name
00 = BB Operational Processor unit is ready for
hex
bit string
HF Antenna
error
TO Toggle bit
out
AN Antenna
AF Assignment
error
AE Assignment
end
AA Assignment
start
TP Tag present Data carrier is in the range
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6 5 4 3 2 1 0
Status code or data
Data
Data
Functional description
operation.
Cable breakage at
antenna or no antenna
connected.
Read operation:
additional data is made
available by the processor
unit.
Write operation:
processor unit can take
over additional data.
Selected antenna.
Buffer 1 Buffer 2
0: antenna 1 0: antenna 2
1: antenna 3 1: antenna 4
Error in processing the job
or job canceled.
Confirmation – Job
finished without error.
Confirmation – Job was
recognized and started.
of the antenna (only in
connection with read,
write and list commands).
Structure of the input buffer
The process data buffer is identical for all commands.
Sub- Meaning
address
00 1st bit
hex
string
01 Status – If AF bit 1: provides
hex
code or information on the status of a
data query
– If AF bit 0: data is written as
with the individual commands
... Data – If AF bit 1: unused
– If AF bit 0: data
Last 2nd bit If first and second bit strings
byte string agree, there is valid data
present.
– The status code is only sent if the AF bit is set
in the bit string.
– Because the read EPC can have varying
lengths (number of bytes), a length field is
sent. The maximum processed EPC length
(12 bytes or 62 bytes) is configured.
– The TID is always sent in a 12-byte frame.
The actual length within this frame is
configured (see chapter BUS parameters on
page 17 and chapter Application
parameters on page 18).
Functional description
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