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HART function
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
field devices. You can commission and re-configure the HART field devices.
HART (Page 76)
Advantages of HART
Using the I/O module with HART offers the following advantages:
• Connection compatibility with analog modules: Current loop 4 - 20 mA
• Numerous field 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 field devices (centralized parameter assignment)
• Online modification of field device parameters
• Information, maintenance and diagnostic displays for the field devices
• Integration of configuration tools for field devices via the HART interface
Commissioning a HART field device
Only HART devices that are set to short frame address 0 can be operated. If a HART field device
with a different short frame address is connected or a connected field device is reconfigured 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 field 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
8
75
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