User manual

69Physical control, switch and control switch assignments

To this end, there are a total of 4 so-called “control

switches”, C1 … C4, available whose switching di-

rection can be established, even inverted, in the

»Control switch« menu, page 145.

• Logical switches, which are available as standard

on the

mc-20 transmitter only (but can be un-

locked on the mc-16 HoTT at extra cost) allow

two switches and / or control switches to be linked

together logically in an “AND” or “OR” circuit. See

the “Logical switches” menu on page 148. A total

of 8 logical switches “L1 … L8” (as well as another

8 inverted logical switches with inverted switching

direction) are available.

The result of a logical switch function can also be

used as an input for another logical switch func-

tion. Refer to the appropriate menu for more de-

tails about this.

• The two FX switches switch a function on “FXI” or

off “FX

” permanently.

• All switches mentioned can have multiple assign-

ments. Pay attention that you do not UNINTEN-

TIONALLY assign reciprocally conﬂicting functions

to a single switch. If necessary, note down the giv-

en switch functions.

Typical applications:

• Shut-off of an on-board glow plug heater upon un-

derrun or overrun of an idle threshold point pro-

grammed for the C1 stick. In this case the glow

plug heater switch is controlled by a transmitter

mixer.

• Automatic switch on/off of the timer to measure

pure “ﬂight time” for a helicopter by way of a con-

trol switch on the throttle limiter.

• Automatic switch off of the “AI  Rud” mixer when

brake ﬂaps are extended, for example to adapt the

roll of a model to the ground when making a land-

ing on a slope without inducing a change of ﬂight

direction due to inﬂuence on the rudder.

• Extending landing ﬂaps with elevator trim adjust-

ment during a landing as soon as the throttle stick

is moved beyond its switch point.

• Switch on/off of the timer for measuring the oper-

ating time of electric motors.