Hi all,
I am trying to use Modbus RS 485 in full duplex, multi-slave configuration.
My configuration is as attached to the image below. where Rt= 120 ohm and Rb= 1.2k. I am using ADM2490 as a RS485 transceiver.
When I connect master and any one of the slaves alone, everything works fine.
But when I connect two slaves at a time, the master could send the queries to both slaves, one at a time, but only one slave responds to the query and another's response is lost.
Am I going wrong anywhere?
I am trying to use Modbus RS 485 in full duplex, multi-slave configuration.
My configuration is as attached to the image below. where Rt= 120 ohm and Rb= 1.2k. I am using ADM2490 as a RS485 transceiver.
When I connect master and any one of the slaves alone, everything works fine.
But when I connect two slaves at a time, the master could send the queries to both slaves, one at a time, but only one slave responds to the query and another's response is lost.
Am I going wrong anywhere?
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