Using Hart - Siemens S7-300 Installation And Operating Manual

Analog modules
9.3 SM 336; F-AI 6 x 0/4 ... 20 mA HART
9.3.16.5

Using HART

System environment for using HART
To operate an intelligent field device with HART functionality, you require the following
system environment:
Current loop 4 - 20 mA via the analog module SM 336, F-AI 6 x 0/4 ... 20 mA HART.
The module functions as a "master" by receiving the commands from the HART parameter
assignment tool, passing them on to the intelligent field device and then returning the replies.
The interface of the module is represented by data records that are transferred via the I/O
bus. These data records are created or interpreted by the HART parameter assignment tool
(SIMATIC PDM)
tool integrated in
The analog values are entered in 16-bit format in the process input and output image.
STEP 7 SIMATIC PDM
,
You can assign the HART parameters either with an external HART handheld device (HART
communicator) or with
the HART communicator is connected directly in parallel to the field device.
Figure 9-45
282
PDM
. (Process Device Manager) is available as a stand-alone tool or as a
HW Config
. An option package is used for the latter.
, HART communicator
SIMATIC PDM
System environment for HART applications
SIMATIC PDM
. accesses through the module while
Installation and Operating Manual, 01/2010, A5E00085586-10
Fail-safe signal modules