12.3
HART applications
System environment
Implementation of intelligent field devices with HART functionality requires the following system
environment (see the figure below):
● Current loop 4 - 20 mA
● HART configuration tool:
The HART parameters can be set using an external handheld panel (HART Handheld) or
a HART configuration tool (SIMATIC PDM). The configuration tool deploys the HART
analog module, whereas the HART Handheld is connected directly in parallel to the field
device.
● HART system integration:
The HART analog module assumes a "master" function by receiving the commands from
the HART configuration tool. It then transfers these commands to the intelligent field device
and returns corresponding response frames. The interface of the HART analog module is
formed by data records which are transferred via the I/O bus. The HART configuration tool
must generate and interpret the data records.
● IM153-2 head-end station for the HART configuration tool:
Head-end station for PROFIBUS DP, which supports master class 1 and master class 2
functionality.
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Figure 12-1 System environment: Use of HART
Notes, Tips & Tricks
12.3 HART applications
Help for SIMATIC PDM (V8.2)
232
Operating Manual, 02/2014, A5E33203676-AA