Siemens SIMATIC MV440 Operating Instructions Manual page 255

Command: Read match string
● The "Read match string" MV command is used to prepare reading of the match string.
The actual read is not executed with the WRITE command.
● The command data area of the WRITE command contains only the command identifier.
● Send the "Read match string" command with the WRITE command and wait for the
positive response. Then read out the actual string with a READ command.
● The WRITE command must specify a length of 0x1 ("MOBY_CMD".length or
"PIB_COMMAND".Length = 0x1), otherwise a negative response will be sent.
Table 10- 16 Moby_CMD
Command
Table 10- 17 PIB_COMMAND
Parameter
CMD
OffsetBuffer
UID
Length
StartAddress
Table 10- 18 Command data area (FB45: Data DB, RFID standard profile: TXBUF or RXBUF)
Address
0x0000
SIMATIC MV420 / SIMATIC MV440
Operating Instructions, 04/2013, A5E02371045-06
Sub_
[hex] Command
[hex]
01 -
Process interfacing via an automation system (PLC, PC)
Length Address_
[dez] MDS [hex]
1 0
Value
0x71
0x00
0x00
0x01
0x00
Value
0x04
10.3 Control with FB 45 and Ident profile
DAT_DB_number DAT_DB_address
[dez]
Number of the Pointer to the start
data DB (for example
48)
Pointer to the user data to be sent to the
reader.
Meaning
Command identifier
"Read match string"
[dez]
word
(for example 0)
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