Siemens SIMATIC MV440 Operating Instructions Manual page 251

Command: Program change (write program number)
To change programs, a WRITE command is sent with the data shown in the following table.
If it is possible to change to the program specified in the job, there will be a positive response
to the WRITE command, otherwise the response is negative.
Before the program is changed, the DISA bit is set automatically on the reader and is reset
again after the program change. If the DISA bit was set manually prior to the program
change, it will remain set.
The WRITE command must set the length 0x2 ("MOBY_CMD".length or "PIB_
COMMAND".Length = 0x2), otherwise the command will be acknowledged negatively. If an
attempt is made to change to an unsaved program or a program number > 0xF, the
command will also be denied and acknowledged negatively.
Table 10- 7
Command
Table 10- 8
Parameter
CMD
OffsetBuffer
UID
Length
StartAddress
Table 10- 9
Address
0x0000
0x0001
SIMATIC MV420 / SIMATIC MV440
Operating Instructions, 04/2013, A5E02371045-06
Moby_CMD
Sub_
[hex] Command
[hex]
01 -
PIB_COMMAND
Command data area (FB45: Data DB, RFID standard profile: TXBUF or RXBUF)
Process interfacing via an automation system (PLC, PC)
Length Address_
[dec] MDS [hex]
2 0
Value
0x71
0x00
0x00
0x02
0x00
Value
0x01
0x00 – 0x0F
10.3 Control with FB 45 and Ident profile
DAT_DB_number DAT_DB_address
[dec]
Number of the
data DB (for example
48)
Pointer to the user data to be sent to the
reader.
Meaning
"Program change" command
identifier
Number of the program
[dec]
Pointer to the
start word
(for example 0)
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