Endress+Hauser PROFI BUS Proline Promag 53 PROFIBUS DP Operating Manual page 122

Commissioning
122
Assignment of the measured variables to the AI module
The measured variables are permanently assigned to Analog Input function blocks 1 to 2 and cannot
be changed.
Module
AI (slot 1)
AI (slot 5)
TOTAL module
The measuring device has three totalizer function blocks. The totalizer values can be cyclically
transmitted to the PROFIBUS (Class 1) via the TOTAL module (slots 2 to 4). 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 → Page 137
Input data
Byte 1 Byte 2 Byte 3
Totalizer value (IEEE 754 floating point number)
Assignment of the measured variables to the TOTAL module
The TOTAL module can transmit different totalizer values to the PROFIBUS master (Class 1).
The measured variables are assigned to the totalizer function blocks 1 to 3 by means of the local
display or with the aid of an operating program (e.g. FieldCare) in the CHANNEL function:
BASIC FUNCTION (G) → PROFIBUS PA (GCA) → TOTALIZER (613) →
SELECT TOTALIZER (6130): Selection of a totalizer →
CHANNEL (6133): Selection of measured variable
Possible settings
Totalizer value/measured variable
VOLUME FLOW
MASS FLOW
OFF
Factory setting
Module Totalizer
function block
TOTAL (slot 2)
TOTAL (slot 3)
TOTAL (slot 4)
Analog Input Measured variable
function block
1 VOLUME FLOW
2 MASS FLOW
Byte 4 Byte 5
Status
Totalizer value/
Measured variable
1 VOLUME FLOW
2 VOLUME FLOW
3 VOLUME FLOW
Proline Promag 53 PROFIBUS DP/PA
ID for CHANNEL function
273
277
ID for CHANNEL function
273
277
0
Unit ID for CHANNEL
function
3
m 273
3
m 273
3
m 273
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