Operating Instructions for RX-5 M-LINK /
RX-7 M-LINK 2.4 GHz receivers
Page 14
Ins
tr
uc
ti
ons
for
R
X
-5
/7
M-
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K
2.
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# 985 531
2 (
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05-
18/
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MU
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!
Checking the FAIL-SAFE function:
For testing the FAIL-SAFE function only, the receiver can be
operated with the transmitter switched off. Caution: if the FAIL-
SAFE settings are incorrect, the motor could burst into life: injury
hazard!
After sixteen seconds in FAIL-SAFE mode no further signals are
sent to the servos (default setting; this period can be altered
using the
MULTImate
or the
MULTIPLEX Launcher
(
Î
10.
)).
Analogue servos and some digital servos (see instructions) then
become “soft”, to avoid them being stalled. Modern speed con-
trollers switch themselves off. However, some digital servos
remain “hard” and maintain their last position.
The FAIL-SAFE function can be activated and disabled servo by
servo using the
MULTImate
or the
MULTIPLEX Launcher
.
Example: throttle only to Idle / OFF, all other servos = HOLD.
8.6 RESET to factory default settings
The receiver settings can be reset to the factory default settings.
If you do this, all the settings you have entered, such as binding
information, FAIL-SAFE settings ... are lost permanently.
Hold the SET button pressed in for at least ten seconds (as a
guide, the LED goes out when you press the button, comes on
again after two seconds, then off again after ten seconds).
When the RESET has been carried out, the LED displays the
confirmation signal (LED code 5
Î
8.1
), and the receiver
switches to binding mode.
!
Note:
it is not possible to carry out a RESET if the receiver is
in binding mode (LED flashing at high frequency).
8.7 Overview of the factory default settings and
variable set-up values
Parameter
Default setting Set-up value can
be altered using
the
MULTImate*
or
MULTIPLEX
Launcher*
Low voltage
(error counter)
4.5 V
Yes
HOLD period
0.75 seconds
Yes
FAIL-SAFE period
16 seconds
Yes
FAIL-SAFE
Off
Can be activated
channel by channel
Receiver name
Internal ID
Max. 12 characters
Address for receiver
battery voltage
0
Yes
Address for
connection quality
1 Yes
Two-receiver mode
On Yes
Servo outputs as
sum signal
= SRXL-MULTIPLEX
(serial servo output /
digital servo data)
Off Yes
Parameter
Default setting Set-up value can
be altered using
the
MULTImate*
or
MULTIPLEX
Launcher*
One sensor address
as “Priority address”
= Address with Prio 1
Off Yes
* Refer to Chapter (
Î
10.
) here.
8.8 Error counter
The receiver features two error counters: for low voltage and
signal errors.
The receiver LED indicates the sum of the seconds during which
errors were detected.
If errors are indicated, they can be saved (stored) after the
landing using the SET button (
Î
8.2
), and read out again later
(
Î
10.
).
1.
Operating voltage errors
Examples: flat or faulty battery, inadequate cable cross-
section, etc.
The counter registers voltage collapses below the threshold
of 4.5 V (threshold can be altered using the
MULTImate
or
the
MULTIPLEX Launcher
(
Î
10.
)).
2.
Signal errors
The count contains instances of interference to the M-LINK
signal packet. For example, this could indicate problems in
the power supply, a defective aerial, etc.
Signal errors are recorded in virtually every flight. In most
cases the pilot does not notice them, but they are still picked
up by the extremely sensitive error counter.
After a few flights, and regular analysis of the error counter, you
will gain the experience required to render the error counter
genuinely helpful, enabling you to detect changes in good time,
and to locate indications of possible causes of interference.
!
Protracted voltage collapses below 3.5 V cause the receiver
to re-boot. If this occurs, the values for both error counters are
lost permanently.
!
If you press the SET button for the purpose of saving the
error count, the stored information is retained until the next time
you save the error count.
9.
T
ELEMETRY
/ F
EEDBACK
C
APABILITY
The telemetry-capable
RX-5 M-LINK
and
RX-7 M-LINK
2.4 GHz
receivers offer a means of transmitting data from the model back
to the transmitter.
When these receivers are employed, the telemetric values for
“receiver battery voltage” and “connection quality” are transmitted
directly, i.e. they require no additional external sensors.
The receivers can also be used in conjunction with up to sixteen
external M-LINK sensors, which are connected to the “S” socket.
In this way a very wide variety of telemetry data can be “sent
back” to the pilot.
!
Note:
The possible methods of indicating telemetry data by visual
and / or audible means vary according to the M-LINK trans-
mitter or RF module in use.
Examples of external M-LINK sensors are as follows:
x
Voltage
sensor
(
# 8 5400
).
x
Temperature
sensor
(
# 8 5402
).
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