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5 I/O Memory 5-6 Timer Area (T) Overview The Timer Area contains Timer Completion Flags (1 bit each) and timer PVs (16 bits each). The Completion Flag is turned ON when a decrementing timer PV reaches 0 (counting out) or an incrementing/decrementing timer PV reaches the set value or 0. Notation T 002 5-6 Timer Area (T) Time number: 002 I/O memory area designator: T Range Timer numbers range from T0 to T255. 5 Details Types of Timers The following table shows which instructions are used to refresh timer PVs in BCD and binary mode. Timer instruction BCD mode Binary mode TIM TIMX TEN-MS TIMER TIMH TIMHX ONE-MS TIMER TMHH TMHHX ACCUMULATIVE TIMER TTIM TTIMX HUNDRED-MS TIMER Timer numbers 0 to 255 are used by all timers listed above. Timer Example: Timer Number 0 and a Timer Set Value of 1 s · BCD mode Timer Completion Flag T000 TIM 000 #10 · Binary mode Timer Completion Flag T000 TIMX 000 #A or &10 CP1E CPU Unit Software User’s Manual(W480) 5-13
