Adeunis RF ARF 73, User Manual

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UG_ARF73 V1.7
The radio frame format depends on the selected protocol.
When acting as transceiver, the radio frame transmission always starts under the following conditions:
whenthenumberofreceivedcharactersfromtheseriallinkishighertothemaximumradioframesizedefinedin
S218 (in number of chars),
Or
Detection of a silence greater than S217 value (in ms) after the last char transmitted on the RS485 lines if the
S218 threshold is not reached.
5.2.1 Transparent mode
In transparent mode, the modem acts as a wired serial link. It means that alternately, the modem sends on the
radio the data received from the serial link and sends on the serial link the data received from the radio.
The radio frame format is :
• <Preamble><synchro>DATA<postambule>.
Preamble, synchronisation and postambule are used for the radio reception.
5.2.2 Addressed mode
In addressed mode, data received on the serial link are sent on the radio link with the following format:
• <Preamble><synchro><Address>DATA<postambule>.
Preamble, synchronisation and postambule are used for the radio reception.
• TheAddressfieldissetupwithS256value.
• Inreceptionmode:The<Address>fieldoftheradioframeischeckedwiththereceptionaddresscontained
in S252
• If the radio frame address matches the transceiver reception address (S252), DATA (and only DATA) are
transmitted on the serial link
Otherwise received data are silently discarded .
5.3. Repeater mode
A repeater can be inserted between two ARF7499 equipments to extend range area. In this case, both terminal
equipmentaresetinaddressedmode(S220=0)andtherepeaterisconfiguredinrepeatermode(S220=2).
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Serial Link
Data from M1
are available
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Serial Link
Data sent to
repeater
Serial Link
Data from M1
are available
The repeater sends on its serial link the data received from the other equipment. Data received for the serial link
is discarded.
Theaddressesmustbeproperlysettogetavalidconfiguration:
Product 1 (terminal equipment 1):
• Txaddress(S256)issetwithn,Rxaddress(S252)iss1.
• Addressedmode(S220=0)
Product 2 (repeater equipment):
• Rxaddress(S252)iss2,Txaddresswillbeautomaticallysetbytherepeater.