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Process interfacing via an automation system (PLC, PC)
10.3 Control with FB 45 and Ident profile
SIMATIC MV420 / SIMATIC MV440
Operating Instructions, 04/2013, A5E02371045-06
261
Table 10- 32 PIB_COMMAND
Parameter
Value
CMD
0x70
OffsetBuffer
0x00
UID
0x00
Length
≥ length of the result string
StartAddress
0x00
Table 10- 33 Command data area (FB45: Data DB, RFID standard profile: TXBUF or RXBUF)
Address
Value
Meaning
0x0000
0x00-0xFF
Length of the entire result string
(more significant byte)
0x0001
0x00-0xFF
Length of the result string (less
significant byte)
0x0002
1st character of the result string
0x0003
2nd character of the result string
…
…
(n + 1)
(n–1)th character of the result
string
(n + 2)
nth character of the result string
Command: Read result string
Using the same mechanism as "Read t result string", it is possible to read out the
decoded string via ASM.
If the trigger source selected in the adjustment support is not "ASM", the READ command
does not activate a trigger but simply returns the result of the decoding.
If a result is already available, this is returned. If there is not yet a result string available, the
system waits until a result string is available.
After processing the command, the result string is available in the command data area
specified in the command ("MOBY_CMD".DAT_DB_number "instance DB-RFID standard
profile".RXREF).
You can abort processing of the command by setting the "MOBY Param".init_run (FB45) or
"instance DB-RFID standard profile".INIT bit (RFID standard profile).
Summary of Contents for SIMATIC MV420
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