Commands
2014-
02
87
enhanced read special fixcode (ES)
Command:
Response:
The R/W head attempts to read a
special read only code
until successful. Only data that
changes is transferred via the interface, i.e. the R/W head transfers data whenever it reads a
new data carrier or whenever it reads a data carrier where there was previously no R/W head
within the detection range.
The status '05h' (read command) is output whenever a data carrier leaves the detection range.
Byte
Contents
Bit no.
7
6
5
4
3
2
1
0
Byte 0
1)
Telegram length, high byte
0
0
0
0
0
0
0
0
Byte 1
1)
Telegram length, low byte
0
0
0
0
1
0
1
0
Byte 2
Command code (71h)
0
1
1
1
0
0
0
1
Byte 3
WordNum/Ident channel/Toggle
bit
<FixLen>
<Channel>
<T>
1)
This byte is only used with the TCP/IP and MODBUS TCP/IP protocol.
Byte
Contents
Bit no.
7
6
5
4
3
2
1
0
Byte 0
1)
Telegram length, high byte
0
0
0
0
0
0
0
0
Byte 1
1)
Telegram length, low byte
0
0
0
0
1
0
1
1
Byte 2
Command code (71h)
0
1
1
1
0
0
0
1
Byte 3
Reserved/Ident channel/Toggle
bit
-
-
-
-
<Channel>
<T>
Byte 4
Status
<Status>
Byte 5
Reply counter
<ReplyCounter>
Byte 6
2)
ID code 00h ... FFh
<IDCode>
...
ID code 00h ... FFh
<IDCode>
Byte N
3)
ID code 00h ... FFh
<IDCode>
1)
This byte is only used with the TCP/IP and MODBUS TCP/IP protocol.
2)
The first byte indicates whether an EPC code is shown
■
1 = EPC application
■
0 = 18000-6C (ISO)
3)
N = <FixLen> + 5; Ethernet/IP: N = <FixLen> + 3
