Balluff BIS U-6020-053-10 RS232, Technical Description, Operating Manual

Page: 32 / 50

BIS U-602_ Processor Unit
TCP/IP / RS232
32
Detection of EPC, TID or USER data from all data carriers located in the read field.
The read field is then monitored continuously for changes in the data carrier population (coming
or going data carriers). The command must be terminated with a stop command.
The following combinations are possible:
– EPC
– EPC + USER
– EPC + TID
1. Controller sends:
Com-
mand EPC TID USER Reserved
1)
End identifier
Character 'CA' 'E'
or
'e'
'T'
or
' ˽ '
'U'
or
' ˽ '
'
˽ ˽ ˽
' CRC-16
or
<LF><CR>
Byte
length
2 1 1 1 3 2
2. Processor unit replies
:
Reply Frame
length
2)
Com-
mand EPC TID
3)
USER
3)
Number
of tags
4)
TAG
status
5)
Data block End identifier
Character <ACK> 00
hex
to
07B5
hex
'CA' 'E'
or
'e'
or
'
˽
'
'T'
or
'
˽
'
'U'
or
'
˽
'
'001' '100'
or
'000'
See "Data
block" table
CRC-16
or
<LF><CR>
Byte
length
1 4 2 1 1 1 3 3 Variable 2
or
Reply Status number End identifier
Character <NAK> See "8.5 Status
Indicators" on
page 43
CRC-16
or
<LF><CR>
Byte length 1 1 2
1) Any character can be allocated to reserved bytes, which are ignored in commands to the BIS U. The reserved bytes are
filled with 0x00 in any replies that the device sends.
2) The frame length refers to the number of bytes in the frame that follow the length field.
3) If the TAG status is coming and TID or USER is requested but this information could not be read by the data carrier, the
field is filled with a '?'.
If the TAG status is going and TID or USER is requested, the field is filled with a blank space.
4) With asynchronous detection, a separate reply is sent for each tag, i.e. "Number of tags" is always '001'.
5) TAG status is only used for asynchronous detection commands.
TAG status '100': TAG coming, TAG status '000': TAG going.
Telegram
Asynchronous
detection (CA)
8
Device Function