Campbell CR850 - Figure 95: Connecting Switch Closures to Digital I;O; Frequency Resolution

Section 8. Operation
303
Figure 95: Connecting switch closures to digital I/O
Using a pull-up resistor on digital I/O channels C1 - C4
8.1.5.3.1 Frequency Resolution
Frequency resolution of a PulseCount() frequency measurement is calculated as
where:
FR=Resolutionofthefrequencymeasurement(Hz)
S=ScanIntervalofCRBasicProgram
Resolution of TimerIO() instruction is:
where:
FR=Frequencyresolutionofthemeasurement(Hz)