Sharepoint 2010 FBA LDAP web application absolute session timeout

Hi,

We have a requirement in our application to set absolute session timeout that even user is active for 10 hours session should expire after that. How can we implement this in Sharepoint 2010 FBA web application?

Currently I have 30 min ideal timeout configured in our application.

$sts = Get-SPSecurityTokenServiceConfig 
$sts.FormsTokenLifetime = (New-Timespan –Minutes 30)
$sts.LogonTokenCacheExpirationWindow = (New-Timespan –Minutes 30)
$sts.Update()

We have sharepoint 2010 FBA web application with LDAP authentication.

Thanks,

Bhavin