Analog voltage control by RS485

Hi everyone,
I have done my 485 communication in both ASCII & RTU mode. So, I have no problem to read/write any data through modbus(i.e. char, short, long & float).
But now I want to operate analog voltage i.e 0 to 10 V DC through RS485 communication.
So please suggest me any idea or circuitry.

Use the serial method of your choice (RS485), to communicate with a microcontroller which is driving a DAC.

mneary said:

Use the serial method of your choice (RS485), to communicate with a microcontroller which is driving a DAC.

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but which DAC? Is DAC provides upto 10 V range?

You use a DAC that provides a lower voltage, e.g. 2.5 or 5V and amplify it. Your opamp must have a 10V (or greater) supply, of course.