MacGregor Industries
76 GLIDER
Fail-safe
Please note that the Fail Safe menu choice will only appear in the Function Menu when SPCM or ZPCM
modulation types are selected in System Mode - MODULAT.
The Function Menu List is accessed from the Information Display Screen by pressing the LIST key. From the Function
Menu List, rotate the Scroll Bar to highlight the "Fail Safe" menu choice and click the Scroll Bar.
In the face of interference, PCM receivers hold the servos at their last known good position. If the interference continues
after the Fail Safe time delay, the Fail Safe system can be programmed to continue to hold the servos or to move them to a
pre-determined Fail Safe position.
Please note that the AUX4 channel cannot accept a Fail Safe position and will always hold its previous last known good
position in a Fail Safe situation.
S-PCM modulation mode.
All channels can be HOLD or individual channels can take a pre-selected position. The fail-safe time delay is fixed at 0.5
seconds.
To change the channel from HOLD to Fail Safe,
highlight the required channel by rotating the Scroll Bar and click on it
to toggle between HOLD and F.S. (Fail Safe). The black direction indicator square moves between the top of the box (Fail
Safe) and the bottom of the box (HOLD) to indicate the current selection. The selection toggles between HOLD and Fail
Safe with each click. As each channel is selected for Fail Safe, any previously stored Fail Safe position will be displayed.
Figures between approximately
±
170 will show with +170 representing full servo deflection in one direction, -170
representing full servo deflection in the other direction and zero representing the servo at neutral.
Move through the channels by rotating the Scroll Bar to select either HOLD or Fail Safe for each.
To store the Fail Safe position,
move
ALL
Fail Safe channels to the required Fail Safe position by moving the transmitter
sticks/switches/levers and store the setting by pressing the CLR key (adjacent to MEMO) on the left of the display screen.
If required, highlight each Fail Safe channel in turn to note the memorised Fail Safe setting for that channel. Once stored,
Fail Safe settings remain in effect until a new store (MEMO) operation is performed or the Model Memory is reset.
Check the Fail Safe operation by operating the model and then switching the transmitter off. The servos will take up the
memorised Fail Safe positions.
To return to the Function List menu, press the LIST key or highlight and click on the LST menu choice.
Z-PCM modulation mode.
All channels can be HOLD or all channels can take a pre-selected position. Three fail-safe time delays are available.
To select a Fail Safe time delay,
highlight the time delay (only OFF, or a previously chosen time delay, will show on the
screen), by rotating the Scroll Bar and click on it to bring up the sub menu. Select a time delay (0.5 sec is recommended) by
Summary of Contents for PCM9XII
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