Time Proportional Output RSLOGIX 5000

This is my first project in RS LOGGIX 5000 I always used code similar to the code laid out by Paul and widelto here:
http://www.plctalk.net/qanda/showthread.php?t=56690

Does RSlogix 5000 have a different way (cleaner and simpler) of achieving the same thing? And is there any sample code?

yes It´s called SRTP but works ony with block and structured text:
Split Range Time Proportional (SRTP)
This information applies to the CompactLogix 5370, ControlLogix 5570, Compact GuardLogix 5370, GuardLogix 5570, CompactLogix 5380, CompactLogix 5480, and ControlLogix 5580 controllers.

The SRTP instruction takes the 0-100% output of a PID loop and drives heating and cooling digital output contacts with a periodic pulse. This instruction controls applications such as barrel temperature control on extrusion machines.