Siemens SIMATIC ET 200SP HA - HART Command

Fast mode
When processing HART commands as an SHC sequence (Successive HART Command), HART
processing is reserved for the current channel.
If a HART command with set SHC bit is recognized by the I/O module for a channel, the complete
HART command processing on the I/O module is reserved for this channel for approx. 2 seconds.
There is no processing of internal HART requests, and there is no HART command processing for
all other channels of the I/O module during this time.
SHC sequence (Page 45)
Note
• While a HART channel of the I/O module is processing an SHC sequence, and thus the
complete HART processing is reserved for this channel, the HART variables of all HART
channels are no longer updated. They remain unchanged in terms of value and quality code.
• HART commands for other channels are not processed and are acknowledged
correspondingly.
Burst mode
The I/O module does not support burst mode. HART commands with set burst bit are ignored and
are not forwarded to the connected 󹪝eld device.
7.3.2 HART command
De󹪝nition
HART commands are used to set the con󹪝gurable properties of HART 󹪝eld devices (HART
parameters). HART responses are used to read out the HART parameters.
Description
The HART commands and their parameters are divided into three groups:
• Universal HART commands (Page 44)
• General purpose HART commands (Page 44)
• Device-speci󹪝c HART commands (Page 45)
HART function
7.3 Communication
AI 4xI 2-/4-wire HART ISOL HA
Equipment Manual, 07/2022, A5E50101523-AB 43