Time Interval to Refresh iView is set to -1 in a BW iview. What does it mean?

Dear Experts,

I am working on a EWM hourly report. The BW report is being updated every hour.

I want to set the auto - refresh of the BW iview.

I found a property - Time Interval to Refresh iView, but have no idea what value to keep to set the refresh to 1 hour.

Is it in seconds or milli seconds or in minutes.

And, Time Interval to Refresh iView is set to -1 by default. What does it mean?

Please help.

Thanks and Kind Regards,

Jelbin