Hi Swaroop,
It is possible to do this.
Under the "Y-Axis" screen of i-Chart, you will find a property names "Allow Multiple Y Axis".
Check this check-box.
In the 'Data Series Details' screen, you can then configure the different things for different Y-Axis.
But the catch here is that you can have only as many Y -Axis as you have data points or tags in the data source of the query or data source.e.g. If you have 3 tags in the query of the chart the nyou can have 3 Y-Axis in the chart.
Also have a look at the help documentation:
SAP Library - SAP Manufacturing Integration and Intelligence
Regards,
Rohit Negi.