KROHNE MFC 300 Profibus - Manual (Page 21)

PROFIBUS PA
3
21
MFC 300
www.krohne.com 07/2014 - 4001086802 - AD MFC 300 PROFIBUS R02 en
Both, the Byte SetTot and ModeTot are cyclically sent from the Master to the device if these bytes
are inserted as output data via the PLC configurator. The meaning of these control bytes are as
follows:
Function of control bytes
All other values of ModeTot not allowed. Value is ignored; totaliser remains in its last valid
setting.
The standard block configuration may be changed by the customer but using the default settings
is highly recommended. If the standard block configuration should be changed by the customer
an acyclic master tool or the device display menu must be used to change the "channel
parameter" value of the block which should be connected to another transducer output value.
3.5.4 Profile specific GSD file: PA139742.GSD
The functionality of the profile specific GSD file is limited. This GSD file includes only four blocks:
The device has to be switched from full functionality to interchangeable basic configuration by
using one of both a master class 2 tool (IDENT_NUMBER_SELECTOR: Slot 0, Index 40; change
byte value to 0) or the device display menu. In the next step, the device has to be configured using
the PA139742.GSD file.
SetTot SetTot SetTot SetTot
SetTot = 0 Totaliser is totalising.
SetTot = 1 Totaliser will be reset to 0 and stays at 0 until SetTot is switched back
again to 0. If the value of SetTot changes from "1" to "0" the totaliser
starts counting from 0.
SetTot = 2 Totaliser is set to the value defined by PresetTot. PresetTot can be
written via an acyclic master (totaliser in block 4 = Slot 4 Index 32;
totaliser in block 5 = Slot 5 Index 32; totaliser in block 6 = Slot 6 Index
32). If the value of SetTot changes from "2" to "0" the totaliser starts
counting from the current value defined by PresetTot.
SetTot > 2 Not allowed. Value is ignored; totaliser remains in its last valid
setting.
ModeTot ModeTot ModeTot ModeTot
ModeTot = 0 Totaliser totalises positive and negative values.
ModeTot = 1 Totalises only positive values.
ModeTot = 2 Totalises only negative values.
ModeTot = 3 Totaliser is stopped, no totalisation will be done.
ModeTot = 248 Totalises all values as positive, negative values will be multiplied with
-1.0.
ModeTot = 249 Totalises all values as negative, positive values will be multiplied with
-1.0.
Block
number Standard configuration
Function block output value PA139742.GSD
Ident-No. 9742 Default
unit
1 Mass Flow AI-FB kg/s
2 Density AI-FB kg/m 3
3 Medium Temperature AI-FB K
4 Mass Totaliser Totaliser-FB kg