RS485 Half duplex with multiple oustations

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Desmond Correia

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Jun 1, 2016, 10:57:56 AM6/1/16

to open-dnp3

Hi,

How would I go about creating a master that can connect to multiple outstations over RS485 half duplex?

I currently have code that implements this but the master cannot connect to the outstation and from what I can tell it appears that the openDNP3 is unaware that the physical line is half duplex.

It looks as if one master will send a command and then try to read but then the next master is sending a command as well.

What I need is the first master send he command and wait for for the read then the next master do the same.

I was hoping you could give me the basic of implementing a master that can communicate with multiple outstations over RS485 half duplex.