Overview Of Functions; Operation In Analogue Mode - Viessmann 4701 Bedienungsanleitung

2.2 Overview of functions

This semaphore signal is equipped with a digital decoder and a motor drive (single arm signals and
signals with two coupled arms) respectively with two motor drives (signals with two uncoupled arms).
This signal has an electronic drive unit which controls the speed and movement of the arm. Integrated
switching outputs can be used for train control. At the end of the downward cycle the signal bounces up
and down a number of times before settling into position (see chapter 5.2).
Viessmann semaphores have finely detailed metal masts, which are very sensitive. Therefore, you should
never touch the masts but only the ground socket for installation and deinstallation (fig. 2). If you have to
unmount the signal, do not pull at the signal mast.
Usually, in Germany main signals are set on the right side of the track in the direction of travel. Signals
with 2 arms can be used as entry or departure signals in train stations or as block signals along the line.
The signals are marked with an alphanumeric combination. Additionally, the designation of the signal
informs about its position. Here are some rules for the correct marking of the semaphore signals:
Block signals: These signals are labelled with arabic numbers (1, 2, 3, ...). In direction of the kilometre
count, the signals are counted with odd numbers (e. g. 1, 3, 5, ...). In the opposite direction the signals are
counted with even numbers backwards ( e. g. 6, 4, 2, ...).
Entry signals: In direction of the kilometre count of the route, the signals are labelled with the letters "A"
to "E", in the opposite direction "F" to "K".
Departure signals: In direction of the kilometre count of the route, the signals are labelled with the letter
"N", in the opposite direction with "P".
The letter of an entry or departure signal is followed by the number of the track for which the signal applies.
In order to label your signals correctly, adhesive signs are supplied with the signal. Cut out the desired
sign and attach it to the signal box after removing the protection foil (fig. 3).

2.3 Operation in analogue mode

The Viessmann semaphore block signal can also be used in analogue model train layouts. You may use
AC or DC power supply for operation.
The integrated controller and decoder recognizes automatically if there is AC or DC power supply or a
digital signal and adjusts to the correct mode of operation.
2.4 Overload protection
The motor drive is protected against mechanical overload. Two switching commands are sufficient for
readjusting the drive mechanism. The system does not detect the blocked status. Therefore, there may
be a momentary difference between the actual signal aspect and the switching outputs.
2.5 Feedback with RailCom
RailCom is a protocol for bidirectional communication in digital model train layouts controlled in DCC. It
allows e. g. the feedback of the address or the requested position from the signal to the digital command
station.
Sending RailCom messages is only possible in layouts with a DCC signal on the rails and if the command
station and/or the booster(s) generate a cut-out in the digital signal. Due to this it is not possible to use
RailCom in a Motorola system without DCC.
Whenever the decoder registers the RailCom cut-out, it answers the switching commands with the current
state of the signal. In case of a moving motor, the estimated remaining movement time is reported.
2.6 Dimmable and switchable signal lighting
The signal lighting can be dimmed and configured via CV 34 according to your own ideas.
In order to enable a comfortable day/night switching of the signal lighting, there are two additional CVs
(CV 71 & CV 79), in which an address can be stored, on which one can switch the signal lighting on and
off with a digital command. Thus, all signal lights can be easily controlled with one and the same switching
command by storing the same address in CV 71 and CV 79 in all signals.
The signal address is programmed in 2 CVs. In CV 71 you set the lower byte (LSB) of the address, in CV
79 the upper byte (MSB).
Please note that signals with two uncoupled semaphore arms require two addresses.
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