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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.