ATEN IC485AI Instruction Manual download pdf (Page 19)

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Auto Send Data Mode

 The IC-485AI operaties in RS-485 Auto Send Data Mode

when SW7 is set to OFF, and SW8 is set to ON.

 In this mode, the status of the bus line is auto-detected in

order to prevent more than one signal on the line.

 If the the bus line is busy, CTS is pulled high, and the IC-

485AI will not send data to the bus line.

 If the bus line is determined to be idle, CTS is pulled low

and the IC-485AI sends data to the bus line.

Start

Receiving

Data

Idle

CTS=0

Complete

Ye s

Busy

CTS=1

Complete

Ye s

Send

Data

Receive

Data

to Send

Ye s

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ATEN IC485AI Instruction Manual Page 19