Digital Acoustics ESBx-110 Especificaciones Pagina 203

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Control Block Description
ADDvantage-32 PLUS
4-73
4.51 PERCENT DIFFERENCE
The Percent Difference block indicates that the percent difference between the reference
and feedback is greater than the setpoint. It can be used to detect a web loss condition on
a center driven winder application.
DIF=
REF-FDBK
REF
100
PER DIF<0
-1
PER DIF<0
FDBK
REF
A
B
(A>B)
1
COMPARE
DIF
TRIP
STPT
PERDIFD101
FIGURE 4-51. PERCENT DIFFERENCE BLOCK
1. Inputs
REF: Analog
FDBK: Analog
STPT: Analog
2. Outputs
DIF: Analog
TRIP: Bit
3. Implementation
DIF = (1 - FDBK/REF) × 100
TRIP = 1, when the ABSOLUTE | DIF | > STPT, else TRIP = 0
If REF = 0, then DIF = 0
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