NI mioDAQ Signal Connections for Counters

The following table lists the default input terminals for various counter measurements on mioDAQ devices. You can use a different PFI line for any of the input terminals. To change the PFI input for a measurement, use the NI-DAQmx channel attributes/properties.

Measurement Ctr0 Ctr1 Ctr2 Ctr3
Count Edges
  • Edges: PFI 0
  • Count Direction: PFI 4
  • Edges: PFI 1
  • Count Direction: PFI 5
  • Edges: PFI 2
  • Count Direction: PFI 6
  • Edges: PFI 3
  • Count Direction: PFI 7
Pulse Width Measurement PFI 8 PFI 9 PFI 10 PFI 11
Period/Frequency Measurement (Low Frequency with One Counter) PFI 8 PFI 9 PFI 10 PFI 11
Period/Frequency Measurement (High Frequency with Two Counters) PFI 0 PFI 1 PFI 2 PFI 3
Period/Frequency Measurement (Large Range with Two Counters) PFI 0 PFI 1 PFI 2 PFI 3
Pulse Measurement PFI 8 PFI 9 PFI 10 PFI 11
Semiperiod Measurement PFI 8 PFI 9 PFI 10 PFI 11
Two-Edge Separation Measurement
  • Start: PFI 4
  • Stop: PFI 8
  • Start: PFI 5
  • Stop: PFI 9
  • Start: PFI 6
  • Stop: PFI 10
  • Start: PFI 7
  • Stop: PFI 11
Position Measurement
  • A: PFI 0
  • B: PFI 4
  • Z: PFI 8
  • A: PFI 1
  • B: PFI 5
  • Z: PFI 9
  • A: PFI 2
  • B: PFI 6
  • Z: PFI 10
  • A: PFI 3
  • B: PFI 7
  • Z: PFI 11

The following table lists the output terminals for counter output. You can use a different PFI line for any of the output terminals.

Ctr0 Ctr1 Ctr2 Ctr3 FreqOut
PFI 0 PFI 1 PFI 2 PFI 3 PFI 15