Vega VEGABAR 53 Operating Instructions Manual page 50

Supplement
-
PA-OUT value of the FB1 after scaling
Temperature
l
-
PA-OUT value of the FB2 after scaling
Additional Cyclic Value
l
-
Additional cyclical value (depending on the source)
Free Place
l
-
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)
Max. 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.
Examples of telegram configuration
In the following you will see how the modules can be combined and how the appendant data
telegram is structured.
Example 1 (standard setting) with pressure value, temperature value and additional cyclical
value:
AI (PA-OUT)
l
Temperature
l
Additional Cyclic Value
l
Byte-No.
1 2
Format
IEEE-754-
Flieskommazahl
Value
PA-OUT
(FB1)
Fig. 17: Telegram configuration example 1
Example 2 with pressure value and temperature value without additional cyclical value:
AI (PA-OUT)
l
Temperature
l
Free Place
l
50
Tip:
The modules are available in two versions:
Short for Profibus masters that only support one "Format"
l
byte, e.g. Allen Bradley
Long for Profibus master only supporting the "Identifier
l
Format" byte, e.g. Siemens S7-300/400
3 4 5 6
Status
Flieskommazahl
Status
(FB1)
7 8 9 10
IEEE-754- Status
Temperature Status
(FB2) (FB2)
11 12 13 14
Status
IEEE-754-
Flieskommazahl
Status
Additional Cyclic
Value
VEGABAR 53 - Profibus PA
15