KROHNE MFC 400 Profibus - Manual (Page 19)

PROFIBUS PA
3
19
MFC 400
www.krohne.com 06/2013 - 4002835301 - AD MFC 400 PROFIBUS R01 en
3.5 PROFIBUS PA Profile implementation
The PROFIBUS PA Profile 3.02 defines standardized parameters and functions for PROFIBUS
devices used for process control. It describes a PROFIBUS device as a function block application,
i.e. parameters and functions are grouped into different blocks. In the MFC 400 PROFIBUS
device the following blocks are implemented:
The Analog Input Function Block and the Totalizer Function Blocks provide the data interface
towards a process control system (e.g. a PLC); i.e. their input/output data can be read/written by
the control system. In a PROFIBUS network this is done via cyclic communication services.
From the PROFIBUS point of view the MFC 400 device is designed as a compact device with 11
slots. While the Analog Input function blocks are assigned to slot 1, 2, 3, 7, 8, 9, 10 and 11 the
Totalizer Function Blocks are assigned to slot 4, 5 and 6. This assignment is fixed and cannot be
modified by the user. Nevertheless during network configuration the user can choose which
function block data shall be transferred between the PROFIBUS master and the PROFIBUS
device.
3.6 GSD files
The GSD file contains information that will be needed for configuration of the PROFIBUS DP
communication network. Supplementary files (e.g. ___.bmp and ___.dib) contain icons which will
represent the PROFIBUS devices in the view of the bus configuration system/master system. The
files must be loaded into the configuration program before. Follow the instructions in the
manual of the host supplier when installing GSD file and supplementary files.
A PROFIBUS GSD ZIP file (e.g. GSD-4002171502.zip) including both all GSD files of all KROHNE
devices with PROFIBUS PA interface and all additional data files mentioned above are available
at the KROHNE download page (e.g. http://www.krohne.com/html/dlc/GSD-4002171502.zip).
Block Usage
1 Physical Block (PB) contains identification and diagnosis parameters of the device
1 Flow Transducer Block
(TB)
contains parameters and functions to control the flow measurement
8 Analog Input Function Block
(AI-FB)
contains parameters and functions to control the measuring output;
provides the measuring value(s)
3 Totalizer Function Blocks
(TOT-FB)
contains parameters and functions to control/provide the counter
value(s)
INFORMATION!
If it is supported by the host configuration tool the device entry for the MFC400 PROFIBUS device
will be located within the slave family "PROFIBUS PA".