Endress+Hauser Levelflex M FMP41C Operating Instructions Manual page 36

Operation
36
5.5.4 Cyclic data exchange
Block model of the Levelflex M
The block model shows, which data are exchanged continously (i.e. by cyclic data transfer) between
the Levelflex M and the PLC. The numbers refer to the function groups and functions:
• After linearization and integration in the transducer block the "measured value" (000) is
transmitted to the Analog-Input Block. There, it may be scaled and checked for limit
transgression, and is written out over "OUT value" (063) to the PLC.
• The function "select V0H0" (068) determines whether at the display of the device in the field
for the main measured value the "measured value" (000) or the value from the PLC "display
value" (069) are displayed.
Modules for the cyclic data telegram
For the cyclic data telegram the Levelflex provides the following modules:
1. Main Process Value
This is the main measured value scaled by the Analog Input Block (063).
2. 2nd Cyclic Value
This is the measured distance between the sensor mebrane and the product surface (0A5) or
the measured temperature (030).
3. Display Value
This is a value which can be transferred from the PLC to the Levelflex M in order to be shown
on the display.
4. FREE PLACE
This module must be applied during configuration (see below), if the 2nd cyclic value or the
display value are not to appear in the data telegram.
Levelflex M FMP41C PROFIBUS PA
L00-FMR230xx-02-00-00-en-001
Endress+Hauser