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Automating Manufacturing Systems - Process Control and ...

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plc memory - 14.15<br />

10.<br />

first scan<br />

RTF<br />

t_initial<br />

delay 15 s<br />

t_initial.DN<br />

RTO<br />

t_off<br />

delay 0.5 s<br />

t_off.DN<br />

RTO<br />

t_on<br />

delay 0.5 s<br />

t_on.DN<br />

t_off<br />

RES<br />

t_on.DN<br />

t_on<br />

RES<br />

t_initial.DN<br />

t_off.DN<br />

O/1<br />

11. three long words (3 * 32 bits) are used for a timer or a counter.<br />

14.8 ASSIGNMENT PROBLEMS<br />

1. Could timer ‘T’ <strong>and</strong> counter ‘C’ memory types be replaced with control ‘R’ memory types?<br />

Explain your answer.<br />

www.PA<strong>Control</strong>.com

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