Thank you for your help.
But I don't understand why the register values change.
So I searched for MCU and found that PIC18F57Q43 is suitable.
But FC10 doesn't support it.
It seems that other people also want support for the Q43 series.
If possible, can you support the Q43 series?

I am working on a project using PIC18F45K40.
I need to use 4 UARTs. So two will use modbus and two will use soft serial.
A UART interrupt was created by referring to the data, but it does not compile.
Could you please help?
thank you.

When will the Q43 series be added?

Should I just get on with it?

Please let me know how I can handle it.

Sorry don't know.

Thank you for your interest. I use 6 serial ports. Serial 1 : External RS-485 Base Modbus RTU Master Serial 2 : for GPS Serial 3 : Local Board RS-485 Base Modbus RTU Master Serial 4 : HMI RS-232 Base Modbus RTU Slave Serial 5 : for between MCU Serial Communication Serial 6 : for Monitoring System SP...

Thanks for your reply.
However, each address of ModBusMaster_Local_3 you modified must have a different Slave ID.

HMI (Touch Screen) operates in Modbus Master Mode.

https://www.cimon.com/introduction/hmi
Brend Name : Cimon. XPanel 15 Inch Touch Screen.

Thank You.

I cannot edit components.
Please help me how to fix the component and I will fix it.
Is there no way?

Please help me.
Thank you.

I posted my project.

Could I apply your advice and test it over the weekend?

Thank you.

Does the Modbus master of FC10 support 8bit Data, Parity None, and 2Bit Stop bit?
If FC10 supports it, please tell me how.

Thank you.