Copyright 2016 © Portable Rotation, Inc.
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cases the operator will not notice it. The system will reset and continue from
where it was prior to the failure. In most cases, a watch-dog timeout is caused
by a communications issue between controllers. This is not a common event.
Minimum / Maximum Turn Explanation
The PR12SAT Rotor System allows for a Maximum Turn of 540 Degrees (1 ½
turns in both directions) from the center heading of 000 Degrees True North.
The system is designed to not allow more than this amount of turn so that
cable-wrap is minimized. Turning past the 1 ½ turn limit would cause damage
to the interconnecting cables.
The system will turn to a new heading using the shortest turn direction so as
to accomplish the turn the fastest. As an example, if you continually do
clockwise turns from 000 degrees, you will reach 000 degrees again, but the
cables will have 1 full turn on them. Continuing to turn clockwise an additional
180 degrees the controller will display A180Exxx on the display and to the host
computer but internally the controller knows that the turn count is 540
degrees. The next clockwise turn would cause a turn past the 540 degrees
limit At that point the turn is stopped at the 180 degree point. The controller
will respond to the host computer that it has reached the commanded turn
position even though the turn was stopped at the max turn position of 180
degrees plus 360.
The next commanded azimuth turn will cause a turn to the new location in the
direction needed to unwind the cables and to return the physical system to +/-
180 degrees from the heading of 000 degrees. At Min/Max turn location (540
degrees of turn clockwise or counter clockwise) a commanded turn to 000
degrees will also cause a cable unwrap operation to be performed.
When the Antenna Auto Calibration option installed, a turn from any position
to 000 degrees will cause the controller to adjust if necessary the azimuth and
elevation to 000/000 degrees.
A fail safe is built into the software that will cause the Rotor Controller to
reset, causing the Hand Controller to reset if the Min or Max turn count goes 5
degrees beyond 540 degrees from home position.
Copyright 2016 © Portable Rotation, Inc.
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Quick User Reference
USB Computer Control Port
4 Conductor
Rotor Cable
Connection
On/Off
Switch
12VDC
Power
Multifunction Button s
Press to Turn Counter Clockwise
Press to Turn Clockwise or Up
While Pressing CCW or CW in Manual turn
Mode, press to turn at full turn rate
- Use CCW and CW to set values using
MODE Button.
- Step through 100s, to 10s, to 1s. After
entering 1s value, auto turn starts.
Press and hold for 1 Second
Then select:
- Manual Turn Azimuth
- Manual Turn Elevation
- Enter AutoTurn Mode
Fault LED turns on if Rotation is
blocked. Will flash when sending
data in Remote Mode
Turn LED turns on during
any Turn operation
Backlighted 2x8 LCD with User
Programmable Top Line
Press all 3 buttons with power on to
read Power supply Voltage, GPS
position, or force an Auto Calibrate
operation if options are installed
