FUNCTION CODES
Chap 5
Data Logic function block Description
100 to 105 Hold + General-purpose
timer
Hold function of previous values of 2 inputs and 1 output, plus
general-purpose timer.
If the hold control signal is OFF, the logic function block outputs
input signals; if it is ON, the logic function block retains the
previous values of input signals.
110 Increment counter Increment counter with reset input.
By the rising edge of the input signal, the logic function block
increments the counter value by one. When the counter value
reaches the target one, the output signal turns ON.
Turning the reset signal ON resets the counter to zero.
120 Decrement counter Decrement counter with reset input.
By the rising edge of the input signal, the logic function block
decrements the counter value by one. When the counter value
reaches zero, the output signal turns ON.
Turning the reset signal ON resets the counter to the initial value.
130 Timer with reset input Timer output with reset input.
If the input signal turns ON, the output signal turns ON and the
timer starts. When the period specified by the timer has elapsed,
the output signal turns OFF, regardless of the input signal state.
Turning the reset signal ON resets the current timer value to zero
and turns the output OFF.
The data can be logically inverted by adding 1000.
The block diagrams for individual functions are given below.
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