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Description
Examples of usable HART commands:
Command
36
37
41
43
8.3.3.3
Device-specific HART commands
Definition
Device-specific commands only apply to the respective field device.
8.3.4
SHC sequence
Definition
If a HART command with set SHC bit is sent to the I/O module, this channel is reserved for HART
commands for 2 seconds.
For each additional HART command with SHC bit set, the I/O module reserves this channel again
for HART commands for an additional 2 seconds. Command 3 or 9 for reading the HART variables
starts being sent cyclically to the field device again if a HART command without a set SHC bit is
detected for this channel, or if no further command is received for the channel within 2 seconds
of the previous HART command.
F-AI 8xI 2-/4-wire HART HA
Equipment Manual, 09/2021, A5E50557845-AA
Function
Sets high range limit
Sets low range limit
Perform self-test
Sets the primary variable to zero
HART function
8.3 Communication
85
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