Rx Fail Safe - GRAUPNER MX-10 HOTT Programming Manual

(control surface travel) for the servo connected to the
control channel selected in the "OUTPUT CH" line. The
value is set separately for each side of centre.
The setting can be altered separately for both directions
within the range 30 ... 150%.
Default setting: 150% on both sides.
PERIOD (cycle time)
In this line you can determine the frame time for the
individual channel signals. This setting applies to all
control channels.
If you use digital servos exclusively, it is safe to set a
cycle time of 10 ms.
If you are using a mixture of servo types, or exclusively
analogue servos, it is essential to set 20 ms, otherwise
the servos will be "over-stressed" and may response by
jittering or making rumbling noises.

RX FAIL SAFE

RX FAIL SAFE
OUTPUT CH: 01
INPUT CH: 01
MODE : HOLD
F.S.Pos. : 1500—sec
DELAY : 0.75sec
FAIL SAFE ALL: NO
POSITION : 1500—sec
Before we describe this menu a few words as a remin-
der:
"Doing nothing" is the worst thing you can do in this
regard. The default setting for the HoTT receiver is
"HOLD" mode.
If interference should occur with hold-mode in force, and
if you are very lucky, the model aircraft will fl y straight
ahead for an indefi nite period and then "land" somewhe-
re or other without causing major damage. However, if
the interference strikes in the wrong place and at the
wrong time, then a power model could become uncont-
rollable and tear wildly across the fl ying fi eld, endange-
ring pilots and spectators.
For this reason you really must consider whether you
should at least program the throttle to "motor stopped",
to avoid the worst of these risks.
After that warning we present a brief description of the
three possible Fail-Safe variants offered by the mx-10
HoTT transmitter:
The simplest way of setting Fail-Safe - and the one we
recommend - is to use the "Fail-Safe" menu, which is
accessed from the multi-function list; see page 116.
A similar alternative, albeit slightly more diffi cult to
access, is to use the "FAIL-SAFE ALL" option described
on the next double-page.
And fi nally there is the relatively complex method of
entering individual settings using the "MODE", "F.S.Pos."
and "DELAY" options. The description of this variant
starts below with the "MODE" option.
Value Explanation Possible settings
OUTPUT CH Output channel 1 ... according to
(receiver servo receiver
socket)
INPUT CH Input channel 1 ... 16
(control channel
coming from
transmitter)
MODE Fail-Safe mode HOLD
FAIL SAFE
OFF
F.S.Pos. Fail-Safe position 1000 ... 2000 μs
DELAY Response time 0,25, 0,50, 0,75
(delay) and 1,00 s
FAIL SAFE Stores fail-safe NO / SAVE
ALL positions for all
control channels
POSITION Displays stored between approx.
Fail-Safe position 1000 and 2000 μs
OUTPUT CH (servo socket)
In this line you select the OUTPUT CH (receiver servo
socket) which is to be adjusted.
INPUT CH (input channel select)
As already mentioned on page 117, the six control func-
tions of the mx-10 HoTT transmitter can be shared out
between several receivers if necessary, or alternatively
several receiver outputs can be assigned to the same
control function; for example, you may wish to be able
to operate each aileron with two servos, or to control an
oversized rudder using two coupled servos instead of a
single one.
Sharing control functions amongst multiple HoTT recei-
vers is a useful idea for large-scale models, for example,
to avoid long servo leads. In this case bear in mind that
only the last bound receiver can be addressed using the
"Telemetry" menu.
The fi ve control channels (INPUT CH) of the mx-10
HoTT can be managed in the appropriate manner using
the facility known as "channel mapping", i. e. by assig-
Program description: Telemetry menu 117