Endress+Hauser Proline Promag 55 - Description of the Modules

Proline Promag 55 PROFIBUS DP/PA Commissioning
Endress+Hauser 97
!
Note!
• The assignment of the measured variables for the Analog Input function blocks (1 to 2) and the
totalizer function blocks (1 to 3) can be changed by means of the CHANNEL function. A detailed
description of the individual modules is contained in the following section.
• The device has to be reset once a new configuration has been loaded to the automation system.
This can be effected as follows:
– By means of the local display
– By means of an operating program (e.g. FieldCare)
– By switching the supply voltage off and on again.
6.7.3 Description of the modules
AI (Analog Input) module
The AI module (slots 1, 5) cyclically transmits the corresponding measured variable, including the
status, to the PROFIBUS master (Class 1). The measured variable is represented in the first
four bytes in the form of floating point numbers in accordance with the IEEE 754 standard. The fifth
byte contains standardized status information corresponding to the measured variable.
Further information on the device status  ä 124.
Input data
Assignment of the measured variables to the AI module
The AI module can transmit different measured variables to the PROFIBUS master (Class 1).
The measured variables are assigned to the Analog Input function blocks 1 to 2 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 DP (GBA)  FUNCTION BLOCKS (612) 
BLOCK SELECTION (6120): Selection of an Analog Input function block  CHANNEL (6123):
Selection of a measured variable
4
TOTAL or
SETTOT_TOTAL or
SETTOT_MODETOT_TOTAL
Totalizer function block 3
TOTAL  output variable = volume flow (factory setting)
SETTOT  totalizer control
MODETOT  totalizer configuration
5AI
Analog Input function block 2
Output variable  mass flow (factory setting)
6 DISPLAY_VALUE Value for local display
7 CONTROL_BLOCK Control of device functions
Slot
sequence
Module Description
Byte 1 Byte 2 Byte 3 Byte 4 Byte 5
measured variable (IEEE 754 floating point number) Status