The bearing values in degree as shown by the display, are not absolute but relative, as show in the
conversion tables:
000
250
500
110
070
000
240
430
180
180
270
090
340
160
Vdc
Deg.
absolute values
relative values
east side
west side
N
S
S
W
E
outrange
outrange
000
250
500
290
070
180
070
430
000
000
090
270
340
160
Vdc
Deg.
absolute values
relative values
east side
west side
N
S
S
W
E
outrange
outrange
South stop
North stop
South stop
North stop
That means when the VDC applied at ADC converter input is 000V or less, the ABS value is 000 and
the display show
110
deg. if setted on South stop (default) while show
290
deg. if setted on North
stop.
With an applied voltage of 2.50V the display will show
000
deg when in South stop and
180
deg
when
in North stop, while with an applied voltage of 5V the display will show
250
deg.
when in South stop
and
070
deg. when in North stop.
The on-board dip-switch
There is an on-board dip-switch that allows the user to change some operating modes without using
the supplied PC program.
Remember that the dip-switch status is read only at power-up and copied into the EEPROM: you
must turn-off and turn-on the main power for a dip-switch change to be effective.
There are four switches:
#1: select the source of the three following parameters: if ON the source is the other three
switches status, otherwise the relative EEPROM contents modifiable through the
W
command
#2: operating mode: if ON is north-stop, otherwise is south-stop
#3: rotation range: if ON the rotation range is 0 to 500 absolute degrees, otherwise is 70 to
430 absolute degrees
#4: PWM: if ON the PWM is enabled, otherwise is disabled
The above parameters (ENA_PWM, LOWLIM, UPLIM, MODE) are not modifiable by USB serial
commands if the switch #1 is ON (dip-switch selected). LOWLIM and UPLIM change accordingly with
the POS_OFFSET values.
Soft start and soft stop:
A MOSFET controlled PWM is included. When it is in active it permits soft-start and soft-stop for the
rotator.
Default value: included.
South stop or North stop:
Selectable via USB port or on board dip-switch, it’s possible to switch the display reading mode.
Default value: South stop.
Rotation range 360 or 500:
500 degrees of travel is enabled as the default value. This allows 70 degrees travel past 360 degrees,
in both directions. Some users may wish to limit travel to 360 degrees. There are two ways to do this
- By setting the on-board dip-switch as described above.
- By using the supplied software - which will allow any limits to be set, to one degree accuracy. Note -
Absolute values must be entered in the input fields.
Default value: 0-500 Degrees
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