YS-S4 Multi-rotor Autopilot User Manual V1.4
11
Adjust
your
two
‐
way
switch
end
points
to
control
the
flight
modes:
CH5
Position
CH6
Position
GPS
Status
Working
Mode
Position
1
Position
1
X
Manual
Stabilization
Position
2
Position
1
GPS
No
Lock
Manual
Altitude
Hold
GPS
Lock
（
above
5
satellites
）
Auto
Hover
X
Position
2
GPS
Lock
（
above
5
satellites
）
Return
and
Land
IMPORTANT:
Return
and
Land
mode
always
takes
priority.
In
any
mode
the
autopilot
will
perform
the
Return
and
Land
operation
if
CH6
is
switched
to
position2.
Step
2
Fail
‐
Safe
Setup
(F/S)
There
are
2
ways
of
setting
up
F/S:
default
mode
and
optional
mode
1)
Default
F/S
mode
Check
with
your
Radio
manual
on
how
to
set
the
Receiver
failsafe.
Ensure
that
when
you
turn
OFF
your
radio,
your
failsafe
settings
are
as
follows:
CH5
set
to
position
2
CH6
set
to
position
2
THR
set
50%
(mid
‐
point)
Default
F/S
only
has
Return
and
Land
mode
which
means
the
YS
‐
S4
will
command
the
aircraft
to
Return
and
Land
automatically
if
the
communication
between
the
TX
and
the
autopilot
is
disconnected.
2)
Optional
F/S
Setup
IMPORTANT
1)
This
only
applies
to
FUTABA
transmitters.
2)
“Optional
F/S”
is
not
recommended
for
beginners
because
the
setting
procedure
is
very
complicated.
Ensure
that
when
you
turn
OFF
your
radio,
your
failsafe
settings
are
as
follows:
CH5
is
set
to
position
2
CH6
is
set
to
50%
(mid
‐
point)
CH5
Position1
—
Manual
Stabilization
Mode
CH5
Position2
—
Auto
Mode
CH6
Position1
—
Neutral
CH6
Position2
—
Return
and
Land
