Rockwell Automation 1761 MicroLogix 1000 Programmable Controllers - Manual (Page 367)

Application Example Programs
E–17
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| | increments | |
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| | +MOV–––––––––––––––+ | |
| +–+MOVE +–+ |
| |Source N7:20| |
| | 0| |
| |Dest N7:10| |
| | 0| |
| +––––––––––––––––––+ |
Rung 7:7
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|–––––––––––––––––––––––––––––––––––––+END+–––––––––––––––––––––––––––|
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Time Driven Sequencer Application Example
The following application example illustrates the use of the TON and SQO
instructions in a traffic signal at an intersection. The timing requirements are:
•
Red light – 30 seconds
•
Yellow light – 15 seconds
•
Green light – 60 seconds
The timer, when it reaches its preset, steps the sequencer that in turn controls which
traffic signal is illuminated. For a detailed explanation of:
•
XIC, XIO, and TON instructions, see chapter 6.
•
SQO and SQC instructions, see chapter 11.
Reference