English - 11
1.6 The loop system’s control signals
The loop system consists of a boundary wire and
guide wires connected to the charging station. To-
gether they essentially comprise 4 different signals:
• A signal
• F signal
• N signal
• Guide signals (420 has only one guide wire,
while 430X can have up to 2 and 450X can
have up to 3 guide wires).
For checking A, F and Guide signals, refer to Chapter
2.3 Tools menu on page 25.
• A signal
Signal that the charging station transmits over
the loop and which sets the boundaries for
the working area of the robotic lawnmower.
Coded information is transmitted via the A
signal to the mower. If there is no A signal, for
example due to a break in the boundary wire
or in the power supply to the charging station,
the robotic lawnmower stops and displays the
No loop signal message.
• F signal
Remote signal from the charging station
which is generated by a loop in the charging
station plate. The F signal is used so that the
mower knows that it is in the vicinity of the
charging station.
There may be reasons to reduce the range
of the charging station in rare cases. It may
be necessary if for instance the charging
station is placed close to a bush or wall which
prevents the robotic lawnmower from docking
with the charging station despite making
contact with the charging station's signals.
The setting is made via Installation - Find
charging station - Charger.
The following ranges apply for each setting.
Setting Range
Min 0 m
Medium approx. 3 to 4 m
Max approx. 6 to 8 m
• N signal
The near signal from the charging station
which reaches about 1 meter. The signal is
generated by a loop in the charging station
plate. The N signal guides the Automower®
correctly into the charging station, so that
the charging strips and contact strips make
contact.
A
F
N
G1
G2
1. FUNCTION
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