Analog Output Function Block; Assignment: Analog Output Function Block / Transducer Block "Flow Computer; Basic Settings In The Analog Output Function Block - Endress+Hauser Proline Prowirl 73 Operating Instructions Manual

Proline Prowirl 73 FOUNDATION Fieldbus
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Endress+Hauser
13

Analog Output Function Block

By means of the Analog Output (AO) Function Block, a value for the operating pressure ("Operating
Pressure" parameter, see Page 131) can be read in continuously (cyclically) from a pressure
measuring instrument (e.g. Cerabar S) by means of the FOUNDATION Fieldbus interface. The value
for the operating pressure is used for continuous density calculation for the following fluids (see
"Operating Pressure" parameter in the Transducer Block "Flow Computer", see Page 131): REAL
GAS, COMPRESSED AIR, SUPERHEATED STEAM, NATURAL GAS NX-19 or WATER
CAS_IN = External input value and status from an upstream block
OUT = Output value and status
BKCAL_OUT = Output value and status for the BCAL_IN input of another block
Note!
Please refer to the Operating Instructions BA 013S/04/en "FOUNDATION Fieldbus Overview:
Installation and Commissioning Guidelines" for a description of the most important parameters and
functions of the Analog Output Function Block. The most important parameter settings of the
Analog Output Function Block are listed below.
13. 1 Assignment: Analog Output Function Block /
Transducer Block "Flow Computer"
The assignment or connection between the Analog Output Function Block and the "Operating
Pressure" parameter in the Transducer Block "Flow Computer" is established by means of the
CHANNEL parameter (option "17" = Analog Output Function Block).
13. 2

Basic settings in the Analog Output Function Block

The following example is intended to illustrate how the value for the operating pressure ("Operating
Pressure" parameter, see Page 131) can be read in from a pressure measuring instrument (e.g.
Cerabar S) by means of the Analog Output Function Block.
0 - 10 bar
Fig. 38: The operating pressure is read in directly from the pressure measuring instrument via the AO Function Block
p = operating pressure
AO
CAS_IN OUT
BKCAL_OUT
FOUNDATION Fielbus - H1
AI
p
CAS_IN
OUT
Transducer Block
"Flow Computer"
13 Analog Output Function Block
AO
OUT
BKCAL_OUT
p
A0007355
A0007356
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