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25 Programmable Logic Controller (PLC)
Rescaler
You can use the rescaler to change the frequency of a periodic input signal. The rescaler can multiply the
period by up to 4096 or divide it by up to 4095.
The rescaler samples the frequency of the input signal, calculates the new output frequency, and emits a
clock with a 50% duty cycle.
Input and output signals do not always align with each other. For example, an input period that is rescaled
by 31.8 will rarely coincide with the output.
During its sample range, the rescaler samples the input signal up to 65536 times (for 16-bit rescalers).
Based on its samples, the rescaler determines the period of the input signal. To accurately sample your
input signal, the sample duration should be as close as possible to the input period while still being longer.
The rescaler samples at a rate determined by the granularity; the maximum number of samples the rescaler
can take is determined by the rescaler size.
Delayer
You can delay an input trigger signal using the delayer.