DATA: Transferred user data / parameters, quantity depending on command (0…230
bytes)
CHK: Checksum
With the exception of the preamble bytes, this structure is contained in the communication data
of the HART command interface.
HART request and response data records (Page 97)
HART responses always contain data. Status information (HART device status; 1st and 2nd status
bytes) is always sent together with a HART response. You should evaluate the status information
to ensure that the response is correct.
8.1.4 HART for safety-related applications
Overview
WARNING
SIL-3 application for channels with HART devices without write protection
For SIL-3 applications for channels with HART devices without write protection, please note that
as soon as you activate the "HART-Tor" parameter, the input values of the channels must be
checked for plausibility, for example by comparison with the equivalent value of another I/O
module in the user program.
Optionally, the I/O module can also be removed from the safety function of the plant for this
time.
FAIW-022
HART function
8.1 Use
F-AI 8xI 2-/4-wire HART HA
Equipment Manual, 09/2021, A5E50557845-AA 77
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