Vega VEGABAR 54 Profibus PA Bedienungsanleitung Seite 53

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53
10 Supplement
VEGABAR 54 • Probus PA
36729-EN-130321
This module must be used if a value should not be used in the data telegram of the cyclical
data trac (e.g. replacement of the 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.
Tip:
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 (standard setting) with pressure value, temperature value and additional cyclical value:
AI (PA-OUT)
Temperature
Additional Cyclic Value
Byte-No.
1234 567891011121314
15
Format
Value
IEEE-754-
Floating point value
PA-OUT
(FB1)
Status
Status
(FB1)
IEEE-754-
Floating point value
Temperature
(FB2)
IEEE-754-
Floating point value
Additional Cyclic
Value
Status
Status
(FB2)
Status
Status
Fig. 25: Telegram conguration example 1
Example 2 with pressure value and temperature value without additional cyclical value:
AI (PA-OUT)
Temperature
Free Place
Byte-No.
1234 5678910
Format
Value
IEEE-754-
Floating point value
PA-OUT
(FB1)
Status
Status
(FB1)
IEEE-754-
Floating point value
Temperature
(FB2)
Status
Status
(FB2)
Fig. 26: Telegram conguration example 2
Example 3 with pressure value and additional cyclical value without temperature value:
AI (PA-OUT)
Free Place
Additional Cyclic Value
Byte-No.
1234 5 6789 10
Status
Status
Status
Status
(FB1)
IEEE-754-
Floating point value
PA-OUT
(FB1)
IEEE-754-
Floating point value
Additional Cyclic
Value
Format
Value
Fig. 27: Telegram conguration example 3
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