Highway Addressable Remote Transducer Protocol: Difference between revisions

Revision as of 04:13, 28 May 2023

Revision as of 06:30, 30 May 2023

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According to Emerson,<ref>Emerson ''https://web.archive.org/web/20181107104043/https://www.automation.com/automation-news/industry/emerson-proves-advancements-in-eddl-electronic-device-description-language-technology'', rev. 2005-04-14</ref> due to the huge installation base of 4–20 mA systems throughout the world, the HART Protocol is one of the most popular industrial protocols today. HART protocol has made a good transition protocol for users who wished to use the legacy 4–20 mA signals, but wanted to implement a "smart" protocol.

==OSI layer==

{| class="wikitable" style="margin: 1em auto 1em auto;"

|+ OSI model

|-

! colspan="4" |

! Wired FSK/PSK & RS485

! Wireless 2.4GHz

|-

! colspan="3" | Layer

! [[Protocol data unit]] (PDU)

! colspan="2" | HART

|-

! rowspan="4" | Host<br />layers

| style="background:#d8ec9b;" | 7

| style="background:#d8ec9b;" | [[Application layer|Application]]

| style="background:#d8ec9c;" rowspan="3" | [[Data (computing)|Data]]

| style="background:#d8ec9c;" colspan="2" | Command Oriented. Data Types and application procedures.

|-

| style="background:#d8ec9b;" | 6

| style="background:#d8ec9b;" | [[Presentation layer|Presentation]]

| style="background:#d8ec9b;" colspan="2"|

|-

| style="background:#d8ec9b;" | 5

| style="background:#d8ec9b;" | [[Session layer|Session]]

| style="background:#d8ec9b;" colspan="2"|

|-

| style="background:#e7ed9c;" | 4

| style="background:#e7ed9c;" | [[Transport layer|Transport]]

| style="background:#e7ed9c;" | [[Packet segmentation|Segment]], [[Datagram]]

| style="background:#e7ed9c;" colspan="2"| Auto-segmented Transfer of large data sets, negotiated segment sizes.

|-

! rowspan="3" | Media<br />layers

| style="background:#eddc9c;" | 3

| style="background:#eddc9c;" | [[Network layer|Network]]

| style="background:#eddc9c;" | [[Network packet|Packet]]

| style="background:#eddc9c;" |

| style="background:#eddc9c;" | Wireless mesh network, Power-optimized

|-

| style="background:#e9c189;" | 2

| style="background:#e9c189;" | [[Data link layer|Data link]]

| style="background:#e9c189;" | [[Frame (networking)|Frame]]

| style="background:#e9c189;" | A [[Binary]], [[Byte]] Oriented, Token passing, Master/Slave.

| style="background:#e9c189;" | Wireless, time synced.

|-

| style="background:#e9988a;" | 1

| style="background:#e9988a;" | [[Physical layer|Physical]]

| style="background:#e9988a;" | [[Bit]], [[Symbol rate#Symbols|Symbol]]

| style="background:#e9988a;" | Analog and Digital Signaling, normally 4-20mA or RS485 Copper wiring.

| style="background:#e9988a;" | 2.4GHz Wireless, 802.15.4. based radios, 10[[dBm]] Tx power

|}

==History==