Digital I/O

The drive has programmable digital inputs and outputs that you can use to initiate motion, control auxiliary devices, or trigger other actions. The inputs and outputs should be wired according to the instructions in the drive Installation Manual (I/O Connection (X21/X22/X23)).

Using Digital I/O

Once wired correctly, digital inputs and outputs can be used for a variety of functions, such as to trigger auxiliary devices, initiate homing moves or other motion tasks, or set travel limits. I/O settings are configured on the Digital I/O WorkBench page. The I/O signal is only used when activated by the desired function.

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• When using I/O devices, you must carefully consider the type of device you use for switches. An unsuitable switch can cause switch bounce, which in turn can cause erroneous triggers to occur. For example a low cost xx switch, as it is toggled, will bounce a few times before it turns on or off. A device that is monitoring these inputs frequently may interpret the bounce as multiple triggers of that I/O. The drive has the ability to reduce this type of error using some debounce techniques to ignore sudden state changes caused by bounces.

Digital Inputs

Digital inputs can be used as a source for a number of drive functions (Action Table, limit switches, homing, etc). The input becomes active depending on the polarity setting and the wiring setup. Default behavior is the input becomes active (DIN#.STATE = 1) when 24V is applied to the IO pin (active high). If polarity is set to active low, the input state becomes active when voltage is removed on the IO pin and becomes low when 24V is applied. An additional signal filter can be configured on each IO pin to filter out glitches.

Digital Outputs

Digital outputs can be driven manually with DOUT#.STATEU or as a result of an action table action. The behavior of each digital output is controlled based on DOUT#.SOURCE. When activated, the digital output will provide 24V on the IO pin.

Bi-Directional I/O

The drive has a number of bi-directional I/O on the X22 and X23 connectors. DIO1-2 are on X22 and DIO3-6 are on X23. These can be used an general purpose I/O when the corresponding X22/X23.MODE keywords are set to GPIO (default). DIO#.DIR controls which direction that I/O will operate in. When configured as an input, the associated input keywords are available and the signal can be used for any input function. Likewise, when configured in the output direction, the associated output keywords are available and the signal can be used for any output function.

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• X22/X23 connectors and corresponding bi-directional I/O may not be available depending on the drive model being used.

Related Topics

Configuring Actions | Hardware Enable | Hardware Limit Switch | Capture