Vega VEGAFLEX 82 Operating Instructions Manual page 77

– Out value of the AI FB2 after scaling
•
AI FB3 (OUT)
– Out value of the AI FB3 after scaling
•
Free Place
– This module must be used if a value in the data telegram of the cyclical data traffic should not
be used (e.g. replacement of temperature and Additional Cyclic Value)
A maximum of three modules can be active. By means of the configuration software of the Profibus
master you can determine the configuration of the cyclical data telegram with these modules. The
procedure depends on the respective configuration software.
Note:
•
Short for Profibus master supporting only one "Identifier Format" byte, e.g. Allen
Bradley
•
Long for Profibus master only supporting the "Identifier Format" byte, e.g. Siemens
S7-300/400
Examples of telegram configuration
In the following you will see how the modules can be combined and how the appendant data tel-
egram is structured.
Example 1
•
AI FB1 (OUT)
•
AI FB2 (OUT)
•
AI FB3 (OUT)
Byte- 1 2
No.
Format IEEE-754-Floating point
value
Value AI FB1 (OUT)
Example 2
•
AI FB1 (OUT)
•
Free Place
•
Free Place
Byte-No.
Format
Value
Note:
Data format of the output signal
Byte2 Byte1 Byte0
Byte4 Byte3
Status Value (IEEE-754)
Fig. 38: Data format of the output signal
VEGAFLEX 82 • Profibus PA
The modules are available in two versions:
3 4 5 6
Status IEEE-754-Floating point
AI FB1
1 2
IEEE-754-Floating point value
Bytes 6-15 are not used in this example.
7 8 9 10
Status
value
AI FB2 (OUT) AI FB2
3
AI FB1 (OUT)
11 Supplement
11 12 13 14
IEEE-754-Floating point
value
AI FB3 (OUT)
4
Status
AI FB1
15
Status
AI FB3
5
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