Ping works fine, but I still can't open the port. modbus tcp slave cannot run.

Please take a look again.

Thank you

Please tell me which MCU (PIC 8-bit or 16-bit) works well and I will change the PCB design to that.
If you give us a working sample program, I will modify the project to fit it.

Please help me.
thank you.

I tested it on MCUs of PIC18F45K40, PIC18F67K40, PIC24FJ512GA606. But it doesn't work at all.

Please let me know any alternative method. I will test it using the method you provided.

Please.
Thank you.

When will this trouble be resolved?

Hello? I would like to inquire because the initialization failed while working on a project. MCU: PIC18F45K40 Component: MODBUS SLAVE Modbus slave 1: RC7(RX) RC6(TX) RC0(DIR) Modbus slave 2: RB7(RX) RB6(TX) RC1(DIR) Modbus slave uses channels 1 and 2 as slaves. Modbus Slave 2 is set up well. However...

Please help me.

Did I write the project wrong?
Or is it a functional problem with FC10?

Can the MODBUS TCP problem be resolved quickly? If not, please tell me another way to solve it.

Whenever solve this problem?
I'm sorry for rushing you.

Thank you.

I thought applying to Q43 would be quick and easy. But looking at what you said, it seems very difficult. Knowing the above, I purchased 2,000 PIC18F57Q43 last year. I mainly use it for industrial purposes and use serial ports a lot. So I want to use PIC18F57Q43. I would appreciate your support for ...

I replaced the MCU for this project with PIC24FH512GA606. I tried changing all the options I could. However,

MODBUS TCP Slave does not work.

Ping works well.

I am posting the project I wrote.

Thank you.