Fema Electronica K Series, Руководство пользователя, Страница: 8 / 32

FEMA ELECTRÓNICA . Series K . K40-232
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1.15 Frame examples
Header Trail
STX ID RSV FROM TO REG RSV LONG CRC ETX
2 32 32 32 54 32 32 32 52 3
Start Ping --- 0 22 0 --- 0 CRC Stop
Header Trail
STX ID RSV FROM TO REG RSV LONG CRC ETX
2 33 32 54 32 32 32 32 53 3
Start Pong --- 22 0 0 --- 0 CRC Stop
Example - The ‘Master’ (address ‘0’) requests confirmation of ex -
istence to the ‘Slave’ at address ‘22’ (frame ‘PING’) and the ‘Slave’
answers to the ‘Master’ with a ‘PONG’ frame.
1.15.1 Frames ‘WRA’ (35) and ‘OK’ (39)
Example - The ‘Master’ (address ‘0’) sends a write frame, with re -
quest of acknowledgment, (frame ‘WRA’) with value ‘65.43’ to reg -
ister number ‘0’ (display value) to the ‘Slave’ with address ‘28’. The
Header Data Trail
STX ID RSV FROM TO REG RSV LONG D0 D1 D2 D3 D4 D5 CRC ETX
2 35 32 32 60 32 32 38 43 54 53 46 52 51 58 3
Start WRA --- 0 28 0 --- 6 +65.43 CRC Stop
1.15.2 Frame ‘ERR’ (38)
Header Trail
STX ID RSV FROM TO REG RSV LONG CRC ETX
2 38 32 60 32 33 32 32 57 3
Start ERR --- 28 0 1 --- 0 CRC Stop
Example - The ‘Slave’ with address ‘28’ answers to the ‘Master’ (ad -
dress ‘0’) with an error frame (frame ‘ERR’) indicating that the reg -
ister is unknown (‘UNKNOWN_REGISTER’, error code ‘1’). The error
1.15.3 Frames ‘PING’ (32) and ‘PONG’ (33)
‘Slave’ answers to the ‘Master’ with a ‘ok’ frame (‘OK’). In case of
error, it will answer with a ‘error’ frame (‘ERR’).
code is indicated in the ‘REG’ byte. For a list of error codes see section
1.22.
Header Trail
STX ID RSV FROM TO REG RSV LONG CRC ETX
2 39 32 60 32 32 32 32 57 3
Start OK --- 28 0 0 --- 0 CRC Stop