Proline Promag 53 PROFIBUS DP/PA
Commissioning
Hauser
121
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 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
Input data
Slot
sequence
Module
Description
1
AI
Analog Input function block 1
Output variable
→
volume flow
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
5
AI
Analog Input function block 2
Output variable
→
mass flow
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