AO Series, E Series, and S Series Signal Connections for Counters
The following table lists the default input terminals for various counter measurements. You can use a different PFI line for any of the input terminals, with the exception of the count direction terminal for edge counting. To change the PFI input for a measurement, use the NI-DAQmx channel attributes/properties.
| Measurement | Ctr0 | Ctr1 |
|---|---|---|
| Count Edges | Edges: PFI 8 Count Direction1: port0/line6 |
Edges: PFI 3 Count Direction1: port0/line7 |
| Pulse Width Measurement | PFI 9 | PFI 4 |
| Period/Frequency Measurement (Low Frequency with One Counter) | PFI 9 | PFI 4 |
| Period/Frequency Measurement (High Frequency with Two Counters) | PFI 8 | PFI 3 |
| Period/Frequency Measurement (Large Range with Two Counters) | PFI 8 | PFI 3 |
| Semiperiod Measurement | PFI 9 | PFI 4 |
| 1 The count direction terminal must be tristated to use an external signal. Reset the device to ensure the terminal is tristated. | ||
The following table lists the default output terminals for counter output. You must use the default output terminal, with the exception that for Ctr0, you can select a RTSI line.
| Ctr0 | Ctr1 |
|---|---|
| CTR 0 OUT | CTR 1 OUT |