Rockwell-automation 1772-LV Mini-PLC - 2/15 Programmable Controller (S Manual de usuario Pagina 162

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Special Programming Techniques
Chapter 11
1115
Figure 11.8
24
Hour Clock
030
15
030
1.0
TON
Rung 1
PR 060
AC 000
030
15
031
CTU
Rung 2
PR 060
AC 000
031
15
032
CTU
Rung 3
PR 024
AC 000
031
15
031
CTR
Rung 4
PR 060
AC 000
032
15
032
CTR
Rung 5
PR 024
AC 000
Seconds
Minutes
Hours
Resets
the clock
A synopsis of the operation’s cycle is:
Rung 1: When the conditions are true the timer will start.
Rung 2: When AC=PR (accumulated value equals preset value) of the timer,
counter 031 increments.
Rung 3: When AC=PR of counter 031, counter 032 increments.
Rung 4: When AC=PR of counter 031, the -
031
(CTR)
- resets counter 031’s
accumulated value.
Rung 5: When AC=PR of counter 032, the -
032
(CTR)
- resets counter 032’s
accumulated value.
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