Eaton ELC-PB, Programming Manual

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EL C Pro g rammi ng Manu al
F o r m o r e i nf o r m a t i o n v i sit : w w w.eato n. co m MN05003003E
1-20
Example 14 - Timing extension circuit
.
T12 TMR Kn2
T11
X0
TMR
Y1
T11
Kn1
T12
Timer = T11, T12
Timer resolution: T
The total delay time: (n1+n2)* T. T refers to the
timer resolution.
X0
Y1
T11
T12
n1*
n2*
T
T
(n1+n2)* T
Example 15 – Cascading Counters
C6 CNT Kn2
C5
X13
CNT
RST
C5
Kn1
X14
C5 RST
Y1
C6
C6
The counting range of a 16-bit counter is 0 ~
32,767. The circuit on the left uses two counters
to increase the counting range to n1*n2. When
the value in counter C6 reaches n2, The pulses
counted from X13 will be n1*n2.
Example 16 - Traffic light control (Step Ladder Logic)
Traffic light control
Red light Yellow light Green light
Green light
blinking
Vertical light Y0 Y1 Y2 Y2
Horizontal light Y20 Y21 Y22 Y22
Light Time 35 Sec 5 Sec 25 Sec 5 Sec
Vertical
Light
Horizontal
Light