Vega POINTRAC 31 Profibus PA Bedienungsanleitung Seite 52

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52
11 Supplement
POINTRAC 31 • Probus PA
43835-EN-131119
AI FB2 (OUT)
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 trac 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 conguration software of the Probus
master you can determine the conguration of the cyclical data telegram with these modules. The
procedure depends on the respective conguration software.
Note:
The modules are available in two versions:
Short for Probus master supporting only one "Identier Format" byte, e.g. Allen
Bradley
Long for Probus master only supporting the "Identier Format" byte, e.g. Siemens
S7-300/400
Examplesoftelegramconguration
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-
No.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15
For-
mat
IEEE-754-Floating point
value
Sta-
tus
IEEE-754-Floating point
value
Sta-
tus
IEEE-754-Floating point
value
Sta-
tus
Value AI FB1 (OUT) AI
FB1
AI FB2 (OUT) AI
FB2
AI FB3 (OUT) AI
FB3
Example 2
AI FB1 (OUT)
Free Place
Free Place
Byte-No. 1 2 3 4 5
Format IEEE-754-Floating point value Status
Value AI FB1 (OUT) AI FB1
Note:
Bytes 6-15 are not used in this example.
Data format of the output signal
Byte4
Byte3
Byte2
Byte1
Byte0
Status Value (IEEE-754)
Fig. 20: Data format of the output signal
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