Endress+Hauser PROline promag 53 - Description of the Modules; AI (Analog Input) Module; Input Data; Assignment of the Measured Variables to the AI Module

Commissioning Promag 53 PROFIBUS DP/PA
106 Endress+Hauser
!
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.
6.6.3 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 →  132
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
3
TOTAL or
SETTOT_TOTAL or
SETTOT_MODETOT_TOTAL
Totalizer function block 2
TOTAL  output variable = volume flow (factory setting)
SETTOT  totalizer control
MODETOT  totalizer configuration
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
8 BATCHING_QUANTITY Batching quantity
9 BATCHING_FIX_COMP_QUANTITY Fixed correction quantity
Slot
sequence
Module Description
Byte 1 Byte 2 Byte 3 Byte 4 Byte 5
measured variable (IEEE 754 floating point
number)
Status