I adjusted the options as you instructed.
I tried changing the clock in various ways.
However, the result is as above. It doesn't work.

I will try it tomorrow morning .
Thank you

I posted my project.

Thank you so much.

I tested it with the program you posted. However, it does not work properly. Sometimes it appears to be a normal value. However, timeout, read error, and write error are repeated. I adjusted all the timings. It also doesn't work. If I unplug the LAN cable and re-plug it or after a long period of tim...

If I unplug the network cable and plug it again, the port not be searched, but if I reset it again, the port will be searched. After 2~3 minutes after reset, the port does not search. And in the port searcher, the manufacturers are searched differently for PIC18F67K40 and PIC24FJ512GA606. Is this ri...

Can you post the project you tested?

Thank you for your help.

TCP Connect
Listen
Scoket Open

If I use commands such as, the port will be searched. However, if you do not use the above command,
The port is not searched.
Modbus TCP Slave is not connected.

MCU : Pic18F67K40

Thank you.

Thank you very much for your help.
However, too much time has passed and we are receiving criticism from customers.
I know you're busy, but please help me.

Thank you.

Transrate by Google

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.