UART and MODBUS

[tkvenki]

Hi,

I have a question.

I'm using UART of my controller for MOdbus communication.
UART means it will have 1 start bit. 8 data bits. 1 partiy and 1 stop bit.

But THe protocol i implement is having different format.(Modbus).

Is what i'm doing is proper??

Please guide me.

 

[Nigel Goodwin]

If the UART can't be set to the format you need, then simply write a software UART to meet the requirements.

 

[3v0]

Hi,

I have a question.

I'm using UART of my controller for MOdbus communication.
UART means it will have 1 start bit. 8 data bits. 1 partiy and 1 stop bit.

But THe protocol i implement is having different format.(Modbus).

Is what i'm doing is proper??

Please guide me.

See Modbus interface tutorial
Most UARTs can be set for the number of stop bits and parity type.
What processor are you using ?
Are you using MODBUS RTU or MODBUS ASCII ?
You told us what you have (1-8-1-1) but not what you need ?