Property Management System - Communication Interface | Architecture |
Transmission
Sequence
Table
Status | ENQ | STX | ETX, | ACK0/ | NAK | |
CRC | ACK1 | |||||
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Neutral (A) | a: ACK0 |
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| (B) |
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| b: NAK |
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| (A) |
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| c: ENQ |
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| (D) |
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Waiting for | (ACK last |
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STX (B) | received) |
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| (B) |
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Waiting for | f: NAK |
| h: ACK0/1 |
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ETX, CRC | (B) |
| i: NAK |
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(C) | g: EOT |
| c: RVI |
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| (A) |
| j: EOT |
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Waiting for | f: ENQ | d: ENQ | d: ENQ | Message | f: ENQ | |
ACK after | (D) | (D) | (D) | (E) | (D) | |
start | g: EOT | e: EOT | e: EOT | j: EOT | g: EOT | |
sequence | (A) | (A) | (A) | (A) | (A) | |
(D) |
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Waiting for | d: ENQ | d: ENQ | d: ENQ | k: Message | m: Mes- | |
ACK after | (D) | (D) | (D) | sage | ||
message (E) | e: EOT | e: EOT | e: EOT | l: EOT | j: EOT | |
| (A) | (A) | (A) | (A) | (A) | |
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| Page 15 |