Endress+Hauser Proline Promag 55 - Description of the modules

Proline Promag 55 PROFIBUS DP/PA Commissioning
Endress+Hauser 107
It is essential to adhere to the following sequence/assignment when configuring the modules in the
PROFIBUS master system:
!
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.
6.8.3 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
Slot
sequence
Module Description
1AI
Analog Input function block 1
Output variable  volume flow (factory setting)
2
TOTAL or
SETTOT_TOTAL or
SETTOT_MODETOT_TOTAL
Totalizer function block 1
TOTAL  output variable = volume flow (factory setting)
SETTOT  totalizer control
MODETOT  totalizer configuration
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
Byte 1 Byte 2 Byte 3 Byte 4 Byte 5
measured variable (IEEE 754 floating point number) Status