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2-6 Volume II O077-2
Outp ut 1
Outp ut 1Outp ut 2
Outp ut 2
Proportional
Ba nd 1
Proportional
Ba nd 2
Ov e rla p
(p ositive va lue )
Process Variable
Output Power (% )
Outp ut 1
Outp ut 1Outp ut 2
Outp ut 2
Proportional
Ba nd 1
Proportional
Ba nd 2
Deadband
(negative value)
Process Variable
Output Power (% )
Outp ut 1
Outp ut 1Outp ut 2
Outp ut 2
Outp ut 2 OFF
Outp ut 2 ON
Proportional
Ba nd 1
Proportional Band 2 = 0
Process Variable
Output Power (% )
Overlap/Deadband
Positive values Negative values
ON/OFF Differential
Figure 2-1 Proportional Band and Overlap/Deadband