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Файл:PLC / FreePLCEbook-2.pdf
plc memory - 14.18
10.
first scan
T4:1/DN
T4:2/DN
T4:3/DN
T4:3/DN
T4:2/DN T4:1/DN
11. three memory words are used for a timer or a counter.
RTF
T4:1 delay 15 s
RTO
T4:2 delay 0.5 s
RTO
T4:3 delay 0.5 s
T4:2 RES
T4:3 RES
O/1
14.8 ASSIGNMENT PROBLEMS
1.Briefly list and describe the different methods for addressing values (e.g., word, bit, literal, etc.).
2.Could timer ‘T’ and counter ‘C’ memory types be replaced with control ‘R’ memory types? Explain your answer.