General-Purpose I/O Ports
You can use the general-purpose I/O port structure for programmable logic controller (PLC) functions or for simple point I/O. Refer to Analog & Digital I/O for information about how to configure the direction and polarity of the I/O ports and bits, set and reset individual bits, and read the logical port status.
These I/O ports are also hardware resources, but because they are never mapped to axes, they are not considered motion resources. Refer to 73xx Controller General-Purpose I/O Port IDs and NI SoftMotion Controller General-Purpose I/O Port IDs for I/O port resource IDs and constants.
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Notes
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Available I/O Resources
The following table lists the I/O resources by controller type.
| Device | Digital I/O Lines |
|---|---|
| NI 7330 | four 8-bit ports, RTSI I/O port |
| NI 7340 | four 8-bit ports, RTSI I/O port |
| NI 7350 | eight 8-bit ports, RTSI I/O port |
| NI PCI-7390 | four 2-bit input ports, four 2-bit output ports, RTSI I/O port |
| NI SoftMotion Controller for Xenus (Copley Controls CANopen drive) |
seven digital input lines, three digital output lines per axis |
| NI SoftMotion Controller for Accelnet (Copley Controls CANopen drive) |
seven digital input lines, two digital input lines per axis |