[only NWA] update max runtime value of a SAP Scheduled Job

Hello,

is there a opportunity to update the max runtime of a scheduled job in NWA?

I want to increase the time to more then two hours.

Can I increae the value only for one job or is it a global value (for all jobs)? 

At other websites I have read various information about that. You can change the value in Backend using TCode SM36/SM37 but currently, my system has no abap stack, only java.

So there is the NWA only.

Thanks in advance