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Multiplex PROFIcar4000 Manual

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PROFI mc 4000PROFI mc 4000
Version 2.0
5
3. Logic-coupled switches
The logical switches fulfil a wish which we have heard
from many modellers:
„I want my airbrakes to be locked unless and until I
select the ‘landing’ flight mode AND the throttle is be-
low 20%“; or
„I want the on-board glow system for my motor to be
switched on when I operate a switch, OR when the
throttle is below 20%, OR when I operate the on-
board starter.“
These are two good examples of applications for
logic-coupled switches.
The new software allows you to define four such
switches: LOG1 to LOG4, and each of the four
switches can have up to four inputs. The linking pos-
sibilities are AND and OR.
AND linking means:
2, 3 or 4 4 conditions must be fulfilled simulta-
neously if an effect is to take place.
Example:
The airbrakes can only be extended if you have
selected the ‘landing’ flight mode (e.g. using the
transfer switch T1-1) AND the throttle is below
1/4 (e.g. with control switch C4-D).
OR linking means:
At least one condition must be fulfilled before
an effect can take place.
Example:
The „on-board glow system“ is to be switched
on when the throttle signal is below 20% (e.g.
with control switch C-D),
OR when you operate switch S06,
OR automatically when the on-board starter is
operated.
This is how it’s done:
To implement the first example (airbrakes) you use
the following procedure:
1. Servo 12 controls the airbrakes.
Assign the servo:
SERVO 12 is SERVOMIX
Assign Mixer for Servo 12:SERVOMIX
1
st
input: FIXED VALUE (-100% = brake closed)
2
nd
input: FIXED VALUE (+100% = brake open)
2. Define transmitter control switch
Assign switches
CONTROL SW: C4 Ä
;FROM CONTROL D
,1-POINT: MAX - 50%_
We set the control switch to -50%, as we assume
that –100% is idle and +100% is full throttle.
3. Defining logic-coupled switches
Assign switches
LOGICAL SW:LOG1 Ä
;INPUT 1
,AND C4-D#*_
You now have to press the w button to open the field
for the control switch and then reverse the control
switch with the R button. This is necessary because
the control switches normally switch ON when the
signal exceeds the switching threshold (MAX). How-
ever, in our example the airbrakes are required NOT
to extend if the throttle is open more than ¼ of full
travel.
The second input to the logic-coupled switch is the
transfer switch T1-1, which simultaneously acti-
vates the ‘landing’ flight mode.
Assign switches
LOGICAL SW:LOG1 Ä
;INPUT 2
,AND W1-1'*_
In this case no reversing is required.
4. The first step here is to assign SERVOMIX to each
airbrake servo (Menu 2: Assigning/SERVOS).
In Menu 2 „Assigning MIXERS“ we assign FIXED
VALUE to input 1 and input 2. This has to be
done separately for the SERVOMIXers of all the
airbrake servos in your model. The two fixed
values correspond to the airbrake settings „ex-
tended“ and „retracted“.
'' TIP:
When assigning the inputs for Servomix you will find
FIXED VALUE directly after „AUX. 4“.
In the menu point TRAVEL/CURVE, under MENU
1: SERVO adjustments, you can now set the fixed
value and assign the switches. You select the
same logic-coupled switch (e.g. L1) for both fixed
values. However, note that you have to reverse
the effect of the switch for input 2 by pressing the
y button.
This ensures that one of the two inputs is always
switched on and the other switched off.
… 5 …


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