Programmable Controllers: Theory and Implementation
Programmable Controllers: Theory and Implementation
Programmable Controllers: Theory and Implementation
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Introduction to PLC Programming <strong>and</strong> <strong>Implementation</strong>—from relay logic to PLC logictimer will not seal until it has timed out. If PB6 is released, the timer will resetbecause PB6 is not sealed. To solve this problem, we can use internal coil1001 to seal PB6 <strong>and</strong> start timing timer 2001 (TDR2). Lines 9, 10, <strong>and</strong> 11of the PLC program coding show this technique. The time delay contacts(2001) are used for ON delays.Industrial Text & Video Company www.industrialtext.com 1-800-752-839852
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