Siemens SIMATIC 6DL1 136-6AA00-0PH1 - Device-Specific HART Commands; SHC Sequence

Description
Examples of usable HART commands:
Command Function
36 Sets high range limit
37 Sets low range limit
41 Perform self-test
43 Sets the primary variable to zero
8.3.3.3 Device-speci󹪝c HART commands
De󹪝nition
Device-speci󹪝c commands only apply to the respective 󹪝eld device.
8.3.4 SHC sequence
De󹪝nition
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 󹪝eld 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.
HART function
8.3 Communication
F-AI 8xI 2-/4-wire HART HA
Equipment Manual, 09/2021, A5E50557845-AA 85