Modbus not working on PIC24FJ512GA606.

For general Flowcode discussion that does not belong in the other sections.
Post Reply
seokgi
Posts: 206
http://meble-kuchenne.info.pl
Joined: Thu Dec 03, 2020 1:43 pm
Has thanked: 5 times
Been thanked: 7 times

Re: Modbus not working on PIC24FJ512GA606.

Post 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.
Top
RGV250
Posts: 283
Joined: Sat Mar 19, 2022 4:53 pm
Has thanked: 25 times
Been thanked: 32 times

Re: Modbus not working on PIC24FJ512GA606.

Post 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
Top
BenR
Matrix Staff
Posts: 1926
Joined: Mon Dec 07, 2020 10:06 am
Has thanked: 503 times
Been thanked: 686 times

Re: Modbus not working on PIC24FJ512GA606.

Post 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?
Top
Post Reply

Return to “General”