II - DCE FEL ČVUT v Praze

4.8 Data Record Interface and User Data
In this section...
Overview of data
record interface
With STEP 7
Overview of user
data
I/O Modules with Intrinsically-Safe Signals
C79000-G7076-C152-04
SIMATIC S7 HART Analog Modules
In this section you will find the specific data which you need for parameter
assignment, diagnostics and HART communication, when using standard
STEP 7 applications or if you want to use your own software tool for HART
communication.
The cyclic user data are described at the end of the section.
The HART analog module uses data records as the input/output interface.
The records are used for the following applications:
Writing the parameters to the module
Reading the diagnostic data of the module
Transmitting the HART communication data
Reading the additional diagnostic data for HART
Writing the additional parameters for HART
You can configure and assign parameters to the HART analog module using
STEP 7. The online help will assist you with this.
Certain additional functions for writing parameters and reading diagnostic
data can be integrated in your user program with SFCs. You can find detailed
information about this in the reference manual /235/.
General information about data records and their structure can be found in
the reference manual /71/. The manual /140/ contains information about
operating the modules in a distributed configuration.
The user data range of the HART analog module includes the following for
both channel 0 and channel 1:
Current as analog input value or analog output value
Primary value in HART format (measured value or manipulated value)
Identifiers for clients, to indicate that new data can be fetched.
Relative addresses are shown in the description of the user data. You can
determine the module address to be added to the relative address using the
STEP 7 application “Configuring and Assigning Parameters.”
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