Process interfacing via an automation system (PLC, PC)
9.3 Control with Ident profile
SIMATIC MV500
Operating Instructions, 06/2018, C79000-G8976-C494-01
113
The following commands are supported:
Table 9- 9 PHYSICAL-WRITE
0x71 Offset in
the
"TXREF"
send
buffer
0x0000 Length of data to be sent to the read-
er:
Sub-command with data to be sent to the read-
er. The first SINT contains the command identi-
• 02 • 01 = Program change (write program num-
ber)
• 01 • 02 = Activate read program number (once)
• Match string length + 3 • 03 = Write match string
• 01 • 04 = Activate read match string (once)
• 01 • 05 = Set DISA bit
• 01 • 06 = Reset DISA bit
• 07 • 08 = Set digital Out
Command: Program change (write program number)
You can perform a program change using the "PHYSICAL WRITE" command. The
command contains the data of the following table. If the program change is successful, the
"WRITE" command receives a positive acknowledgment; otherwise, it receives a negative
acknowledgment.
Before the program change, the "DISA" bit in the optical reader is automatically set and reset
after the program change. If the "DISA" bit was set manually prior to the program change, it
will remain set.
The "WRITE" command must specify the length "0x02" ("CMD_STRUCT.LEN_DATA =
0x02"); otherwise, the command receives a negative acknowledgment. If an attempt is made
to change to an unsaved program or a program number > "0x0F", the command will also be
denied and receive a negative acknowledgment.
Table 9- 10 CMD_STRUCT
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