Siemens SIMATIC ET 200SP HA - Communication

Structure of the HART-speci󹪝c settings
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Figure B-1 Settings
* When the number of HART preamble bytes = 0, the number of preamble bytes required by the
connected 󹪝eld device are used, but no fewer than 5.
When the number of HART preamble bytes = 255, then 20 preamble bytes are used.
HART operating data records
B.6 HART-speci󹪝c settings
AI 4xI 2-/4-wire HART ISOL HA
Equipment Manual, 07/2022, A5E50101523-AB 83