Siemens SIMATIC MV500, Operating Instructions Manual, Page: 163 / 294

Process interfacing via an automation system (PLC, PC)
9.3 Control with Ident profile
SIMATIC MV500
Operating Instructions, 03/2021, C79000-G8976-C494-05
163
Table 9- 19 Memory area of the receive data (TXREF or RXREF)
Address Value Meaning
0x0000 0x05 Command identifier
"Set DISA bit"
Command: Reset DISA bit
The command data to be "written" in the "PHYSICAL WRITE" command only contains the
command identifier "Reset DISA bit".
If the "DISA" bit of the optical reader has been reset, the command receives positive
acknowledgment. If it was already reset, this command has no effect but is nevertheless
positively acknowledged.
The "PHYSICAL WRITE" command must specify the length "0x01" ("CMD_STRUCT.Length =
0x01"); otherwise, the command receives a negative acknowledgment.
Table 9- 20 CMD_STRUCT
Parameter Value
CMD 0x71
OffsetBuffer 0x00
UID 0x00
Length 0x01
StartAddress 0x00
Table 9- 21 Memory area of the receive data (TXREF or RXREF)
Address Value Meaning
0x0000 0x06 Command identifier
"Reset DISA bit"
Command: Set digital out
Writing command data
The command data to be "written" in the "PHYSICAL WRITE" command contains the command
identifier and six parameters.
With this command, the four logical signals "EXT_1", "EXT_2", "EXT_3" and "EXT_4" can be set
and linked to other logical signals. These signals can only be set through an automation
system. In addition, these signals can be applied to the available digital output pins via the
WBM.
Receipt of this command is logged in the diagnostics data records. If the command contains
an invalid parameter, a negative acknowledgement is sent.