YS-S4 Multi-rotor Autopilot User Manual V1.4
12
THR
is
set
to
50%
(mid
‐
point)
Check
with
your
Radio
manual
on
how
to
set
the
Receiver
failsafe.
Here
you
can
choose
any
of
the
following
F/S
modes:
Auto
RTH
and
Land;
Auto
Land
and
Auto
Hover.
Now
the
YS
‐
S4
autopilot
will
control
the
aircraft
according
the
pre
‐
programmed
F/S
mode
if
the
aircraft
loses
the
TX
signal.
(set
this
up
on
the
PC
software
under
“Fail
Safe”
options)
Please
refer
to
this
video
for
help
setting
up
your
TX:
http://www.tudou.com/programs/view/e1ai526Mbt4/
6.3
Parameter
Setup
YS
‐
S4
Parameter
setting
can
be
achieved
using
a
mobile
phone
or
tablet
(must
be
connected
to
WI
‐
FI)
or
by
using
a
PC
to
adjust
the
parameters.
6.3.1
PC
Parameter
Adjustment
Please
download
the
special
“PC
‐
Parameter
Setup
Software”
from
the
Zero
website
before
parameter
configuration.
IMPORTANT
1)
“PC
‐
Parameter
Setup
Software”
is
also
the
firmware
upgrade
tool;
2)
S4
will
choose
different
working
modes
if
the
sequence
used
in
powering
‐
on
is
different:
If
you
power
the
S4
first
and
then
connect
the
USB
cable
you
will
be
in
“Parameter
Setup”
Mode.
If
you
connect
the
USB
cable
first
and
then
power
on
the
S4
then
you
are
in
“Firmware
Upgrade”
Mode.
PLEASE
NOTE
THE
FOLLOWING
WHEN
SETTING
UP
AND
INSTALLING
THE
S4:
When
the
craft
is
on
the
ground,
power
the
TX
first
and
then
power
the
S4.
Please
MAKE
SURE
propellers
are
removed
before
connecting
the
battery
to
prevent
injury
from
the
motors
starting
unexpectedly.
a.
Power
the
YS
‐
S4
first
and
then
2
seconds
later
connect
the
YS
‐
S4
module
to
your
PC
via
the
USB
interface.
MAKE
SURE
the
THR
stick
is
at
the
bottom.
Connect
the
mini
USB
cable.
b.
Select
and
open
software
“S4
‐
GCS
‐
USB.exe”,
press
“Open
USB”
and
press
the
‘Read’
button
(If
this
fails
try
several
times)
to
download
your
YS
‐
S4
module
current
aircraft
configuration.
c.
Press
‘Save’
button
(If
this
fails
try
several
times)
to
upload
the
newest
parameters
to
the
YS
‐
S4
if
the
parameters
have
been
changed.
d.
To
restore
the
default
parameters,
push
THR
stick
to
bottom
and
press
‘Default’
button.
e.
The
S4
V2
default
parameters
are
shown
below: