VEGA VEGASON 62 Profibus PA User Manual
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10 Supplement
VEGASON 62 • Profibus PA
28785-EN-130417
•
Additional Cyclic Value
– Additional cyclical value (depending on the source)
•
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:
The modules are available in two versions:
•
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 (standard setting) with distance value, temperature value and additional cyclical value:
•
AI (PA-OUT)
•
Temperature
•
Additional Cyclic Value
Byte-No.
1
2
3
4
5
6
7
8
9
10
11
12
13
14
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
Example 2 with distance value and temperature value without additional cyclic value:
•
AI (PA-OUT)
•
Temperature
•
Free Place
Byte-No.
1
2
3
4
5
6
7
8
9
10
Format
Value
IEEE-754-
Floating point value
PA-OUT
(FB1)
Status
Status
(FB1)
IEEE-754-
Floating point value
Temperature
(FB2)
Status
Status
(FB2)
Example 3 with distance value and additional cyclical value without temperature value:
•
AI (PA-OUT)
•
Free Place
•
Additional Cyclic Value
Telegram configuration:
Byte-No.
1
2
3
4
5
6
7
8
9
10
Status
Status
Status
Status
(FB1)
IEEE-754-
Floating point value
PA-OUT
(FB1)
IEEE-754-
Floating point value
Additional Cyclic
Value
Format
Value