Honeywell HC900 - TPO Time Proportional Output Function Block

Function Blocks
TPO Time Proportional Output Function Block
406 HC900 Hybrid Control Designer Function Block Reference Guide Revision 11
2/07
TPO Time Proportional Output Function Block
Description
The TPO label stands for Time Proportional Output.
This block is part of the
I/O Blocks category.
Function
Proportions the amount of ON time and OFF time of a Digital Output over a user defined cycle time.
• On Time = [cycle time * (IN - range lo)] / (range hi - range lo)
• OFF Time = cycle time - On Time
• If On Time < minimum ON time, then On Time = 0.0
• If OFF Time < minimum OFF time, then OFF Time = 0.0.
Input
Analog Input value in Percent (%)
Block properties
Double click on the function block to access the function block properties dialog box.