Simrad NSS evo2 series Installation Manual page 32

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at first time turn on, or at turn on after an autopilot reset.
¼ Note:
Installing a feedback unit will enhance the performance of the autopilot and provide an
accurate rudder angle indicator on the autopilot display. Unless impractical or impossible, a
rudder feedback unit should be installed.
5.
Set the drive voltage
•
Refer to the drive unit table in the AC12N/AC42N Installation manual or to your drive unit
documentation for information.
6.
Run the rudder test as described in the on-screen instructions
¼ Note:
If the boat uses power assisted steering, it is important that the engine or electric mo-
tor used to enable the power assist steering is turned on prior to this test.
Stand CLEAR of the wheel and do not attempt to take manual control of the wheel dur-
ing this test!
•
When this test is started the autopilot computer will issue a series of PORT and STBD rudder
commands and automatically verify correct rudder direction. It detects minimum power
to drive the rudder and reduces the rudder speed if it exceeds the maximum preferred
speed (8°/sec.) for autopilot operation. The system will also detect whether the drive unit is a
reversible motor or if a solenoid valve is operated.
Rudder drive setup
The rudder drive setup controls how the autopilot computer controls the steering system.
Drive voltage
Voltage specified for your drive unit.
The Drive unit voltage setting does not apply when the system operates solenoids on a
continuous running pump/steering gear. Hence, the output voltage to the solenoids will be
the same as the input voltage.
Refer to the drive unit table in the AC12N/AC42N Installation manual or to your drive unit
documentation for information.
Warning:
! Selection of improper voltage level for your drive unit may damage both the
drive unit and the AC12N/AC42N even if the protection circuits are activated.
Drive engage
Clutch This is the default setting and it allows you to steer the boat with the helm or
wheel when in STBY mode (FU and NFU modes) as well as in all auto steering
modes
Auto This option is typically used to switch between two rudder speeds on a
continuous running pump, used when different rudder speeds are required for
automatic and Follow-up/Non-Follow-up steering
Motor output
Shows the amount of power needed to achieve the correct rudder speed. The reading is
obtained from the Rudder test.
The automatically set value may be increased or decreased.
Software setup | NSS evo2 Installation Manual