Python and MODBUS

How can we use MODBUS variables within Python Scripts?
Also, Is there any manual that describes the Python commands that can be used in FreeScada?

Regards,
jimleg

ADDING TWO OR MORE MODBUS VARIABLES.

Hello,

I would like to create an «AnalogueTextValue» the will show the sum of four (4) MODBUS variables.
I have already tried to use the Simulation Settings and create a new variable_1, but I am not very familiar with the Python Syntax to do it correctly.
Can someone help me?

Thanx,
Dimitris