Newport NewStep NSA12 User Manual page 31

Operating NewStep
Also, the Knob is equipped with a push button that is used for changing the
Operations Mode. By pressing this switch, the mode of operations changes
between REMOTE (power up default) and LOCAL mode. This switch is also
used for "Homing" the actuator. When this push button is pressed for longer than
5 seconds the Controller will initiate the Homing process, in which the actuator
will move toward the Hard limit (Negative direction) and home (Zero Position)
before the Negative Hard Limit.
On the back, the Parameter Reset Button is used for restoring factory default
Controller Address. The Controller Address is the number that the Computer
software will use to communicate with a particular Controller on the RS485 bus.
The factory default Controller Address is 0.
Below the Knob there are two side-by-side push buttons that are disabled for this
version of the product.
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