VEGA VEGAPULS 66 (≥ 2.0.0 - ≤ 3.8) Profibus PA - Manual (Page 58)

Module of the PA sensors
For the cyclic data traffic, VEGAPULS 66 provides the following modules:
l AI (PA-OUT)
-
PA-OUT value of the FB1 after scaling
l Additional Cyclic Value
-
Additional cyclical value (depending on the source)
l Free Place
-
This module must be used if a value should not be used in the data telegram of the cyclical data
traffic (e.g. replacement of temperature and Additional Cyclic Value)
Max. two 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:
l Short for Profibus master supporting only one "Identifier Format"
byte, e.g. Allen Bradley
l 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 telegram
is structured.
Example 1 (standard setting) with distance value and additional cyclical value:
l AI (PA-OUT)
l Additional Cyclic Value
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
Example 2 with distance value without additional cyclical value:
l AI (PA-OUT)
l Free Place
58 VEGAPULS 66 • Profibus PA
10 Supplement
28448
-EN
-090305