Any charge for unutilised share pledged margin amount?

I have got Margin amount of 3Lacs by pledging my shares about a month back.For some reason,
I could not use it so far.Is there any Charge for not using the same and keeping it idle.? Can I unpledge now
and repledge again when needed?

There are no charges.

Yes, if you want to, you can unpledge your securitues, and pledge later when needed.

Thanks for your clear reply within 5 minutes of time