Spektrum PowerSafe AR9100, User Manual, Page: 12 / 20

Spektrum AR9100 12
Failsafe Functions
Preset Failsafe
Preset Failsafe is ideal for sailplanes and is preferred by some modelers for their glow
and gas powered aircraft. With Preset Failsafe, if the signal is lost all channels are
driven to their preset failsafe positions. Here’s how Preset Failsafe works:
Receiver power only
When the receiver only is turned on (no transmitter is present), no pulses are output
to the servos so the servos are not driven and remain in their “at rest” position. The
receiver remains in standby mode with the blue battery LED(s) on definately until the
transmitter signal is present. When the transmitter is turned on, the receiver locates
the signal (GUID), connects, and normal control resumes. When connected, the
amber LEDs on the attached remote receivers will be on.
After connection
When the transmitter is turned on and after the receiver connects to the transmitter,
normal control of all channels occurs. After the system makes a connection, if loss
of signal occurs Preset Failsafe drives all servos to their preset failsafe positions that
were set during binding. When the signal is regained, the system immediately (less
than 4ms) regains control.
Preset Failsafe:
• Prevents unintentional electric motor response on start-up.
• Eliminates the possibility of over-driving servos on start-up by storing preset
failsafe positions.
• Establishes preset failsafe servo positions for all channels if the signal is lost.
Note: Failsafe positions are stored via the stick and switch positions.