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Re: Modbus not working on PIC24FJ512GA606.
Posted: Fri Nov 25, 2022 12:28 am
by seokgi
Yes.
I know it. So MCU Power is 3.3V and RS-485 Power is 5V.
I tested PIC18F45K40 with MAX484 MAX13487 on 3.3V, 5V.
Thank you.
Re: Modbus not working on PIC24FJ512GA606.
Posted: Fri Nov 25, 2022 1:58 pm
by RGV250
Hi,
If you have transceiver with automatic direction control you use RS232, you only need RS485 if you need Flowcode to control the direction.
Bob
Re: Modbus not working on PIC24FJ512GA606.
Posted: Fri Nov 25, 2022 3:42 pm
by BenR
I wonder if it's something to do with the timings and the DDR pin. Looking at the signals can you compare data being sent to data being received, is any of it missing at the start or end of the data?