ADEUNIS ARF73 Manual de usuario descargar pdf (Pagina 12)

RF73

User Guide

Ref. 09-07-V1-smn p 10

• ‘O’<cr><lf> (ASCII character 0x4f,0x0d,0x0a) for accepted

command (meaning OK)

• ‘E’<cr><lf> (ASCII character 0x45,0x0d,0x0a) for error (meaning

ERROR)

Transceiver mode

In transceiver mode, two protocols are available:

• Transparent protocol

• Addressed protocol

The communication is always half-duplex. The radio transmission is processed

prior to the radio reception (when the transceiver is sending a radio frame, it

is not able to decode any incoming radio frame).

If no data are sent on the serial link, the modem is waiting for radio

reception. Each radio frame sent by another modem is received and the data

extracted from the radio frame are sent on the serial link. When the last

character has been sent on the serial link, it is possible to send an answer

after the end of this last character.

All the data received on the serial link are encapsulated in a radio frame.

The radio frame format depends on the used protocol.

When acting as transceiver, the radio frame transmission always starts under

the following conditions:

Detection of a silence greater than S217 value (in ms) after the first

char (after the last transmitted frame) transmitted on the RS232

lines,

Or when the number of received characters from the serial link is

higher to the maximum radio frame size defined in S218 (in number

of chars).

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ADEUNIS ARF73 Manual de usuario Pagina 12