AH500 Programming Manual
2-48
B. The accumulative timer
When the instruction TMR is executed, the accumulative timer begins to count. As the value of
the timer matches the setting value, the output coil is ON. As long as users add the letter S in
front of the letter T, the timer becomes the accumulative timer. When the conditional contact is
OFF, the value of the accumulative timer is not reset. When the conditional contact is ON, the
timer counts from the current value.
When X0.0 is ON, the timer T250 takes 100 milliseconds as the timing unit and counts up.
As the current value of the timer matches the setting value 100, the output coil of T250 is
ON.
When X0.0 is OFF, the timer T250 stops counting and the current value of the timer remains
unchanged. Not until X0.0 is switched ON will the timer counts again. When the timer counts
up from the current value to the setting value 100, the output coil of T250 is ON.
C. The timer used in the function block
T1920~T2047 are the timers which users can use in the functional block or the interrupt.
When the instruction TMR or END is executed, the timer used in the functional block begins to
count. As the value of the timer matches the setting value, the output coil is ON.
If the general-purpose timer is used in the functional block or the interrupt, and the functional is
not executed, the timer can not count correctly.
2.2.11 Counters
The characteristics of the 16-bit counter:
Specification of the setting value
The setting value can be either the constant or the value in the
data register.
Change of the current value
The counter stops counting when the value of the counter
matches the setting value.
The contact is ON when the value of the counter matches the
To Next Page
Loading...
