 | How to use Read or Write I/O on NI-IMAQ I/O Devices |
Use the Read/Write (NI-IMAQ I/O) step to configure the digital inputs and outputs on NI CVS-1450 Series Compact Vision System or NI PCI-8254R/PCIe-8255R IEEE 1394 interface devices with reconfigurable I/O.
- In the Step Name control, enter a descriptive name for the step.
Digital Input Tab
- Select the digital lines and port you want to use. The digital input lines can either read the current value or detect edges (Rising, Falling, or Any). If you select one of the edge detection actions, specify an Edge Detection Filter Width (ms) to ignore changes that are less than the specified time period.
The isolated port consists of ISO lines 0–4. The latched value corresponds to the value of these lines when a rising edge was detected on ISO 5.
Digital Output Tab
- Select the digital lines and enable lines you want to write. Digital output lines can be set to drive Low, High, Toggle, or to output system signals, boolean measurement results, or the value of a boolean variable. Enable lines can be set to Enable or Disable. The enable lines can also be controlled by output system signals, boolean measurement results, or the value of a boolean variable.
- Click OK to add the step to the inspection.