Endress+Hauser Proline Promag 55 - PROFIBUS DP cyclic data transmission

Commissioning Proline Promag 55 PROFIBUS DP/PA
96 Endress+Hauser
6.7 PROFIBUS DP cyclic data transmission
Below is a description of the cyclic data transmission when using the Promag 55 GSD file (complete
device functionality).
6.7.1 Block model
The block model illustrated shows which input and output data the measuring device provides for
cyclic data transmission via PROFIBUS DP.
A0013934-EN
Fig. 59: Block model for Promag 55 PROFIBUS DP Profile 3.0
6.7.2 Modules for cyclic data transmission
The measuring device is a so-called modular PROFIBUS slave. In contrast to a compact slave, the
structure of a modular slave is variable - it consists of several individual modules. In the GSD file,
the individual modules (input and output data) are described with their individual properties. The
modules are permanently assigned to the slots, i.e. the sequence or arrangement of the modules
must be observed when configuring the modules (see following table). Gaps between configured
modules have to be assigned the EMPTY_MODULE module.
To optimize the data throughput rate of the PROFIBUS network, it is recommended to only
configure modules that are processed in the PROFIBUS master system.
It is essential to adhere to the following sequence/assignment when configuring the modules in the
PROFIBUS master system:
Esc
E
+
-
XXX.XXX.XX
Esc
E
- +
Analog Input 1
Output value AI
Output value AI
Out value TOTAL
Analog Input 2
Totalizer 1
Signal
processing
PROFIBUS
PROFILE
Parameter
Manufacturer
specific
Parameter
Control (CONTROL_BLOCK)
Display value (DISPLAY_VALUE)
Transducer
block
Configuration SETTOT, MODETOT
Totalizer 3
Measured variable 1
Measured variable 2
Out value TOTAL
Local
Display
Out value TOTAL
Totalizer 2
PROFIBUS DP
Physical
Block
Measured variable 1
Measured variable 2
Measured variable 3
Measured variable …
Configuration SETTOT, MODETOT
Configuration SETTOT, MODETOT
Slot
sequence
Module Description
1AI
Analog Input function block 1
Output variable  volume flow (factory setting)
2
TOTAL or
SETTOT_TOTAL or
SETTOT_MODETOT_TOTAL
Totalizer function block 1
TOTAL  output variable = volume flow (factory setting)
SETTOT  totalizer control
MODETOT  totalizer configuration
3
TOTAL or
SETTOT_TOTAL or
SETTOT_MODETOT_TOTAL
Totalizer function block 2
TOTAL  output variable = volume flow (factory setting)
SETTOT  totalizer control
MODETOT  totalizer configuration