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BIS V-6108 PROFINET
Processor Unit
37
english
Command Identifier 02
hex
: Write to Data Carrier
Writes USER data at the specified start address. The data length is equal to the number of bytes.
When using a data carrier with expanded memory, the
Write to Data Carrier
command can also
be executed as a command with 24-bit addresses.
Refer to: Command Identifier 81
hex
, Read Data Carrier with 24-bit Addresses.
Note
A password is required to write to read-only data carriers.
Write commands that are attempted with an invalid password will be acknowledged
with the status message
Password Required
or
Password Invalid
(
See “Status codes”
on page 34
).
Details about access passwords can be found in the manual of the UHF read/write
head used.
Subaddress
Meaning
Description of Function
00
hex
1st Bit Header
01
hex
Command Identifier 02
hex
: Write to data carrier.
02
hex
Start address
(low byte)
Start address to be written from.
03
hex
Start address
(high byte)
Start address to be written from.
04
hex
Number of bytes
(low byte)
Number of bytes to be written starting from the start
address.
05
hex
Number of bytes
(high byte)
Number of bytes to be written starting from the start
address.
…
None
No meaning
Last byte
2nd Bit Header
If the 1st and 2nd bit headers match, the data is valid.
Data is accepted from the processor unit only after the command has been accepted by the
processor unit and acknowledged.
Subaddress
Meaning
Description of Function
00
hex
1st Bit Header
01
hex
Data
Transmission of the data that is to be written to the data
carrier.
…
Data
Transmission of the data that is to be written to the data
carrier.
…
None
No meaning
Last byte
2nd Bit Header
If the 1st and 2nd bit headers match, the data is valid
Input Buffer: Status Message
Subaddress
Meaning
Description of Function
00
hex
1st Bit Header
01
hex
Data
Provides information on the status of a query.
…
Data
No meaning
Last byte
2nd Bit Header
If the 1st and 2nd bit headers match, the data is valid.
Structure of the
commands for
read/write heads
7
Device Functions