BIS V-6108 PROFINET
Processor Unit
36
english
Command Identifier 81
hex
: Read Data Carrier with 24-bit Addresses
When assigning addresses to data carriers with expanded memory, the start address and
number of bytes can be specified as 24-bit values. Information about executing the command as
well as about return values are drawn from the 01
hex
command (See
“Command Identifier 00
hex
:
No Command Present”)
.
Subaddress
Meaning
Description of Function
00
hex
1st Bit Header
01
hex
Command Identifier 01
hex
: Read from data carrier.
02
hex
Start address
(low byte)
Start address for reading.
03
hex
Start address
(middle byte)
Start address for reading.
04
hex
Start address
(high byte)
Start address for reading.
05
hex
Number of bytes
(low byte)
Number of bytes to be read starting from the start
address.
06
hex
Number of bytes
(middle byte)
Number of bytes to be read starting from the start
address.
07
hex
Number of bytes
(high byte)
Number of bytes to be read starting from the start
address.
...
None
No meaning
Last byte
2nd Bit Header
Valid data is present if the 1st and 2nd bit strings
match.
Structure of the
commands for
read/write heads
7
Device Functions