Siemens SIMATIC MV540 H - Page 130

Process interfacing via an automation system (PLC, PC)
9.4 Control with FB 79
SIMATIC MV500
130 Operating Instructions, 06/2018, C79000-G8976-C494-01
Note
Enable data recognition
If no data ID is entered, processing takes place but no data is transferred.
Note that no trigger is required for the "B#16#09" data identifier.
The following table gives you an overview of the contents and data types provided by the
data ID. This requires that the data identifier contains the position or quality characteristics.
The order of the code properties in the table is identical to the order of the code properties in
the data packet. The result string is returned following the code properties if applicable.
Table 9- 38 Possible contents and data types of the data identifier
Data to be read
consists of ...
Data type
Position of the data matrix code
1)
• X position
• Y position
• Roll angle
• Viewing angle
INT
Absolute quality characteristics
• Symbol contrast
• Print growth
• Axial non-uniformity
• Unused error correction
REAL
Quality characteristics as classes
• Symbol contrast
• Print growth
• Axial non-uniformity
• Unused error correction
• Overall grade
CHAR
1)
Viewing angle is only output for DMC quality = "Ambitious"
Note
Absolute quality characteristics
If the data to be read outputs the quality characteristics as absolute, check the "Swap"
parame
ter in the WBM ("Settings > Communication > Interfaces > PROFINET IO").