FMC Corporation - Talstar 80 Manual De Usuario

Commissioning

Proline Promass 80 PROFIBUS PA

TOTAL module

The measuring device has one totalizer function block. The totalizer values can be cyclically
transmitted to the PROFIBUS master (Class 1) via the TOTAL module (slot 5). The totalizer value
is represented in the first four bytes in the form of a floating point number in accordance with the
IEEE 754 standard. The fifth byte contains standardized status information corresponding to the
totalizer value.
Further information on the device status

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Input data

Assignment of the measured variables to the TOTAL module

The TOTAL module can transmit different totalizer variables to the PROFIBUS master (Class 1).
The measured variables are assigned to the Totalizer function block by means of the local display or
with the aid of an operating program (e.g. FieldCare) in the "CHANNEL" function:

TOTALIZER

→ TOTALIZER option: select a totalizer →

CHANNEL: select a measured variable

Possible settings

Factory setting

Example:

You want to cyclically transmit the totalized volume flow as totalizer value 1 to the PROFIBUS
master (Class 1) by means of the TOTAL module (slot 5):

TOTALIZER

→ TOTALIZER option: select TOTALIZER 1, then select CHANNEL = VOLUME

FLOW

Byte 1

Byte 2

Byte 3

Byte 4

Byte 5

Totalizer value (IEEE 754 floating point number)

Status

Totalizer value/measured variable

ID for CHANNEL function

MASS FLOW

277

VOLUME FLOW

273

CORRECTED VOLUME FLOW

398

OFF

Module

Totalizer

function block

Totalizer value/

Measured variable

Unit

ID for CHANNEL

function

TOTAL (slot 5)

MASS FLOW

kg/s

277