Refer to SimNet cables and accessories, page Page 28 SimNet must be properly terminated, i. The SimNet network has to be terminated according to the number and type of products connected. Page External Alarm 2. The operating voltage for the circuit is the main supply voltage. Autopilot Computer Figure External alarm connection 30 Installation Page 34 SimNet cables and accessories SimNet cable 0.
Page 35 Blank page 34 Spare parts list Page Technical Specifications 4 Technical specifications 4. Sail- and Motor boat displacement and planning , up to 80 ft. Steering system types Hydraulic, Mechanical Inter-unit connection SimNet network Maximum number of products connected in a network Page 37 Steering modes Page Ap28 Control Unit 4.
See Figure Weight Page Autopilot Computers 4. IP56 Temperature range: Operation Same as FC Page Rf Rudder Feedback Power consumption Deck or bulkhead Automatic Performance: Calibration Automatically activated from control head Gain control Automatically adjusted continuously Deviation control Page 45 Cable supplied Polarity independent two wire frequency signal Frequency resolution Page Rf25 Rudder Feedback 4. See Figure and Figure Horizontal, vertical, or upside down Supply and interface Page Js10 Joystick Cable length Environmental Protection: Joystick IP66 Terminals IP20 Safe distance to compass Temperature range: Operation The rudder will now be automatically centered.
Page Set Rudder Zero Seatrial settings The Seatrial menu presents settings and automatic calibrations to be performed during seatrial. The seatrial must always be performed in open waters at a safe distance from other traffic. The Seatrial menu can only be accessed if the Dockside Settings are completed and confirmed.
Steer the boat manually on a steady course. If required, confirm the rudder ZERO position by pressing the softkey. Compass calibration Before the compass calibration is started, make sure that there is enough open water around the vessel to make a full turn. Page 86 See illustration next page.
Calibration is made on the compass that is active for the autopilot. If another model compass from Simrad or another manufacturer is installed, refer to the instruction for that compass regarding calibration.
Direction of local field with respect to lubber line. It can also be on the reciprocal. Any residual error in the apparent wind angle display can be corrected manually by entering the required offset. A positive value indicates starboard offset angle,- a negative value indicates port offset angle. Page 89 0. The default setting of the transition speed is 6 knots.
Page Automatic Tuning Dockside menu. Automatic tuning is a procedure that is not required for the AP28 to function as it is preset with steering parameters that should steer most boats in the foot range.
It is, however, recommended to perform an automatic turning as part of the seatrial. After the Autotune has been completed the rudder must be controlled manually, as the autopilot has returned to STBY mode. The Automatic tuning function will take control of the boat and perform a number of S-turns. See below for information. Automatic steering The Automatic steering menu contains steering parameters for course steering, wind steering and nav steering. Boat type Own boat Displayed Displacem. Page 94 Rudder sets the rudder gain which is the ratio between the commanded angle and the heading error.
Page Minimum Rudder New course Counter rudder setting too high, sluggish and creeping response New course Correct setting of counter rudder, ideal response Autotrim standard value is 40 seconds which should work well on most boats.
Page 99 If the auto-setting does not perform properly due to high inertia from the wheel or a loose steering gear, it can be adjusted manually. Find the lowest possible value that will prevent the rudder from continuous hunting.
A wide deadband will cause inaccurate steering. Page Simnet Groups Simrad, None, Simrad Alarms Simrad, None, Simrad Simrad: Default group for AP28 None: Not assigned to a group 1 — 6: Group numbers The figures on next page illustrates how the instruments on a flybridge and in a cockpit are assigned to separate language, damping and backlight groups, and how this affects the setup for the different instruments.
The instance number is added to the product name e. AP, AP for easy identification of the unit. Page Confirm Demo mode by pressing the softkey. If the unit is turned off while in demo mode, the demo mode will still be active on next power on. Demo mode is deactivated by using the menu as illustrated above. Page Blank page Setup at installation Page Alarm System 5 Alarm system 5. Refer to Alarms, page When an alarm is notified, the alarm will be indicated with an alarm text and with an audible alarm.
Page Acknowledging An Alarm 5. This will remove the alarm notification text, light and sound from all units that belongs to the same alarm group. Refer to SimNet Groups, page A reminder will reappear at given intervals as long as the alarm situation exists. Page Blank page IS20 Alarm system Page Troubleshooting 6 Troubleshooting An autopilot is a complex system.
Its performance depends on a proper installation and a successful seatrial. The main menu includes a Service item that access several options to display data used when testing or troubleshooting the system. Page Resets In the event an Autopilot reset has been made, refer to chapter 4.
Global reset A Global reset resets the entire SimNet setup in the Simrad Group and initiates a new automatic interface setup. See chapter 4. To confirm the Global reset press the softkey. The display will prompt you to repeat the interface setup. Audible and visual alarm are provided for every fault being detected, see chapter 5.
Refer to the table below for hints and try to solve the problem yourself. Page Display Probable fault Recommended action readout Shallow water The depth is inside the set Carefully observe the actual limit or outside the range depth Depth data is missing Adjust the alarm limit if not hazardous Steer to safe depth, the alarm will reset automatically Turn off the shallow alarm if data is missing Page Maintenance 7 Maintenance 7.
Page Compass If the compass is exposed to the weather, make a visual inspection at months intervals, and at the start of each season. Simrad RX Mode changes are as per table below. The rudder will move for as long as the lever is held in left Port or right Starboard position. Page Zero point setting Unless you need a rudder angle display when leaving the dock, just steer the boat manually on a straight course and press the AUTO key.
The zero point is then set automatically. If you prefer to use the rudder angle display when leaving the dock, proceed as follows: After turn-on the rudder angle display will alternate between Page Blank page Optional equipment Page Glossary 9 Glossary Apparent wind — The speed and direction from which the wind appears to blow with reference to the bow when the boat is moving also called relative wind.
Page NMEA sentences, e. Product ID — A number, suffix, acronym or term that can identify a product. Product name — The name of a Simrad product known from sales and other literature. Route - A stored sequence of waypoints. These waypoints will be listed in the order in which you desire to follow them. Page Simrad Group, Class 2 products will automatically subordinate themselves to the Class 1 source selection.
SimNet Group — A number of Simrad products that are selecting and sharing the same data sources via the SimNet network. Page Blank page Glossary Page Index 10 Index about AP28, damping, 55 alarm data pages, 48 codes, data pages setup, 53 indication, day profile, 60 listing, demo mode, shallow water, 56 depth calibration, 77 wind shift, 56 depth contour tracking, Page motor output, 98 configuration, 99 groups, multiple station, 49 instance number, status, software program, nav change limit, 39, 79 version, 10 navigating, 38 sources, 57 NFU Steering lever, speed over ground, 89 night profile, 60 spiral-turn, 26 NoDrift, 36 square-turn, Print page 1 Print document pages.
Expanded multi-station compatibility offers several control options including use of Simrad AP24 Autopilot control unit. Any future autopilot control units will also work thanks to the SimNet system. Both models are compatible with Hydraulic and Mechanical steering systems. Web design by Webpublishing. Simrad AP28 Autopilot Powerful, fully featured State of the art display and control functions and advanced SimNet networking, makes the all new Simrad AP28 Autopilot the perfect autopilot for larger power and sail boats.
Improved steering algorithms - full Rate of Turn ROT control provides smooth and precise turns in any condition and improves tack and gybe performance on sailboats. Virtual Rudder Feedback This unique feature, recently introduced to Simrad autopilots means that no rudder feedback unit is needed for outboards and stern drive boats. Automatic Tuning Simrad AP28 Autopilot include a number of self calibrating features that automatically compensate for the unique handling characteristics of your boat and sea conditions, insuring optimum performance without the need for expert manual calibration.
Contour Steering This unique Simrad feature utilizes data from your fishfinder or depth instrument to maintain a set water depth, just as if you were manually steering your boat along depth contours on a paper chart.
Integrated Turn Patterns When fishing or looking for a wreck, you might choose from a variety of automatic steering patterns that can help you in your search. Rate Of Turn Control Simrad AP28 Autopilot is equipped with advanced control algorithms that enable smooth and precise turns regardless of sea conditions.
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