HART function
8
8.1 Use
8.1.1 Notes on use
Reference is made to the functions and use of HART in the following.
Use of HART
The use of HART modules enables you to exchange additional data with the connected HART
eld devices. You can commission and re-congure the HART eld devices.
HART (Page 76)
Advantages of HART
Using the I/O module with HART oers the following advantages:
• Connection compatibility with analog modules: Current loop 4 - 20 mA
• Numerous eld devices with HART functions are in use
• Application of HART devices on an IO device based on the ET 200SP HA
• Additional digital communication using the HART protocol
HART protocol (Page 76)
HART applications
The following applications are typical:
• Commissioning of eld devices (centralized parameter assignment)
• Online modication of eld device parameters
• Information, maintenance and diagnostic displays for the eld devices
• Integration of conguration tools for eld devices via the HART interface
Commissioning a HART eld device
Only HART devices that are set to short frame address 0 can be operated. If a HART eld device
with a dierent short frame address is connected or a connected eld device is recongured to
a short frame address other than 0 during operation, the module starts a scan of all possible
short frame addresses at the next re-establishment of HART communication (command 0 with
short frame addresses 1...63). As soon as the connected eld device responds, it is converted to
the short frame address 0 (HART command 6) by the module. During the scan, the module
reports a HART communication error.
F-AI 8xI 2-/4-wire HART HA
Equipment Manual, 09/2021, A5E50557845-AA 75
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