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8.2.3
HART signal
Definition
A HART signal consists of sine waves of 1200 Hz and 2200 Hz and has an average value of 0.
Description
The following figure shows the analog signal with the modulated HART signal (FSK method). It
can be filtered out using an input filter so that the original analog signal is available again.
①
②
K
A
8.2.4
HART device status
Definition
The two HART status bytes (HART device status) transferred with each response of the field
device contain error information about the HART communication, the HART command and the
device status.
F-AI 8xI 2-/4-wire HART HA
Equipment Manual, 09/2021, A5E50557845-AA
Analog signal
Time (seconds)
Command
Response
HART function
8.2 HART system connection
81
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