Command Identifier 0X02: Write Data Carrier - Balluff BIS U-4A7-082-01C-07-S4 Betriebsanleitung

BIS U-4A7-082- _1C-07-S4
Industrial RFID system - Read/write head
8
System integration (continued)
8.7.3

Command identifier 0x02: Write data carrier

Writing user data to a data carrier that is within the
detection range of the antenna of the read/write head.
The memory area to be written is specified via start
address, number of bytes and memory bank.
The memory bank of the memory area to be written can be
set via parameter 0x0085 – Subindex 4.
If there are several data carriers in the detection range of
the read/write head, the desired data carrier must be
selected before writing (command identifier 0x40, see
chapter 8.7.4 on page 47).
A password is required to write to read-only
data carrier.
Write commands that are executed with an
invalid password are acknowledged with the
status message P
(see parameter 0x0085 – subindex 2 in
invaLid
chapter 8.3.2 on page 36 and chapter 8.8 on
page 62).
For writing the EPC and adjusting the length,
there is a simplified command with the
command identifier 0x43.
Command:
Subaddress Meaning
0x00 1st bit string
0x01 Command
recognition
0x02 Start
address
(Low Byte)
0x03 Start
address
(High Byte)
0x04 Number of
bytes
(Low Byte)
0x05 Number of
bytes
(High Byte)
0x06...0x1E None
0x1F 2nd bit
string
46 english
or P
aSSword required aSSword
Functional description
0x02: Write data carrier
Start address from which
to write.
Start address from which
to write.
Number of bytes to be
written from start address.
Number of bytes to be
written from start address.
No meaning
If the 1st and 2nd bit
strings match, valid data is
present.
Data is only accepted when the command has been
acknowledged.
Data:
Subaddress Meaning
0x00 1st bit string
0x01 Data
... Data
0x1F 2nd bit
string
Depending on the number of bytes to be written, several
bus cycles may be necessary to transmit the data.
Functional description
Transmission of the data
that is to be written to the
data carrier.
Transmission of the data
that is to be written to the
data carrier.
If the 1st and 2nd bit
strings match, valid data is
present.