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 VIs 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 numbers.

Notes The RTSI port is not supported by the NI SoftMotion Controller. The resource ID for the RTSI port is 0x09 (9).

Using Unlisted General-Purpose I/O Ports

Complete the following steps to use unlisted general-purpose I/O ports:

1. Open the desired VI in LabVIEW.
2. View the block diagram.
3. Right-click the appropriate terminal and select Create»Constant.
4. Click the drop-down arrow on the constant and select Other.
5. Type the selected port number, in decimal.

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