Yes, you can set digital inputs of positive and negative limits and home sensors on external I/O modules via parameter settings. The NC300 series CNC controller can add external control devices through its I/O modules. The I/O modules can be enabled in the RIO setup page as shown in the figure below. Please link to the I/O modules using the following steps. 1. Press key to enter the [Parameter Setup function] screen. 2. Press key to enter the page containing this function bar. 3. Press key (RIO Setting) to enter the I/O module and its property setup page. Use the axis selection option in the [Home Limit] setting to set the digital inputs of positive and negative limits and home sensors on the external I/O module. ‧ Axis Selection: If none of axis selections are checked, it means the digital inputs of positive and negative limits and home sensors are input by the AXIS 1 to AXIS 4 terminal blocks of the CNC controller. ‧ According to the checked axis number and name, starting from X256, each axis occupies three digital inputs, which include positive limit, negative limit and home sensors respectively. ‧ Please see the example below. When X, Y, Z, and A are checked, the results are as follows: X-axis: positive limit DI (X256), negative limit DI (X257), home sensor DI (X258) Y-axis: positive limit DI (X259), negative limit DI (X260), home sensor DI (X261) Z-axis: positive limit DI (X262), negative limit DI (X263), home sensor DI (X264) A-axis: positive limit DI (X265), negative limit DI (X266), home sensor DI (X267)