OpenPay is a unified payment gateway through which you can receive customer payments via credit/debit card, net banking, NEFT, IMPS & RTGS.
Here's what it looks like on the Open platform:
Any payment that you receive via Open will initially get credited to your OpenPay account. Post that, these payments will be settled to your ICICI current account (that you've linked with Open) based on the applicable settlement time.
In case, if you've connected more than one ICICI current account to Open, the payments will be settled to your primary ICICI account.