Search found 9 matches

You can also see 'why' we often have to ask for people to give the compiler
version. You nicely did, so I 'went looking' to see if there might be a compiler
issue. Sadly there was... :sad ...

Looking at it, something very odd is going on with his compiler version.
If you look, the code as posted has 0x1D 05 loaded into the bottom holding
register, but the reply being shown has 00 01 bein ...

Since the 4520 version works, post that code AND the 46k22 code. As the modbus.c is the same ,that must NOT be the cause of the problem.

Have to ask is the hardware the same ?
Proper bias on the ...

Dear PCM programmer and temtronic I am really sure that I am making something wrong with 18f46k22 and need advice.

#fuses HSM,NOWDT,NOPROTECT,NOBROWNOUT,NOLVP,NOPUT,NOWRT,NODEBUG,NOCPD,NOPLLEN ...

Yes, when I originally read your post, I immediately thought 'lots of the K
chips have PPS', which is why I raised this. Then went and looked at the data
sheet for your specific chip and found PPS ...

Dear Ttelmah thank you so much for your reply. I tried several things for a week and thats why I missed "#define MODBUS_PROTOCOL MODBUS_PROTOCOL_SERIAL" sorry for confusion. I wrote my code ...

Dear Ttelmah thank you very much for your reply.

Do you mean

#pin_select U1TX = PIN_C6
#pin_select U1RX = PIN_C7

instead of

#define MODBUS_SERIAL_RX_PIN PIN_C7
#define MODBUS_SERIAL_T ...

Dear PCM programmer thank you very much for your reply. On the board 8Mhz connected. I am using EasyPICv7 development board.

#use delay(clock=8000000) //cristal de 20MHz
What crystal is on the bo ...

I am trying a little Modbus communication with pc via modbus poll. If I use 18f4520 communication is ok. But when I tried same things on 18f46k22 ıt doesn't work. Is there any special things for 18f4 ...