The Viessmann Signal Bus - Viessmann 5224 Gebrauchsanleitung

Socket "Hp2": if this socket remains open, then
the module will switch a two-aspect signal from
"stop" to "proceed" (Hp1). If it is bridged, the sig-
nal will be switched from "stop" to "proceed at re-
duced speed" (Hp2).
Socket "Sh1": if this socket remains open, then
the signal will respond to the commands of the
inputs for the control panel (as per the yard signal
logic). If it is bridged block signal logic is activated.
Once you have set all options with the wire brid-
ges, press the button "Config" for at least 3 se-
conds until the LED starts to blink slowly. The set
options will be saved permanently (until you deci-
de to re-programm the module). At the same time
the module switches to the second stage of the
configuration, which is programming for Märklin
Motorola.
Programming for Märklin
Motorola
The control module indicates this status by slow
blinking of the control LED. Now you may enter a
command with the keyboard with the address to
be used for this signal. The module waits for the
first valid switch-command and takes its address
as its own. The now dark LED indicates the com-
pletion of this process and the signal continues
with the control cycle described below.
When configuring the module for a multi-aspect sig-
nal the module accepts an uneven digital address
as its first and the subsequent even number as the
second address. Therefore the command for a
multi-aspect signal for address 001 and 002 would
programm the module in both cases to address
001 and 002. The combination of address 002 and
003 is not permitted, since this could easily lead to
overlaps with the address of other decoders.
Programming for NMRA DCC
A second press of the programming button takes
the module to the DCC programming mode. The
LED indicates this status by fast blinking. The pro-
cess of assigning addresses is the same as in the
Maerklin Motorola format.
Exiting the Programming Mode
The control module automatically ends the pro-
gramming mode once it receives a valid digital
command. It then calls up the control cycle. If you
want to use the module in analogue mode, then a
third press of the programming button ends the
programming mode.
Default settings: Pressing the programming but-
ton three times (the first time at least 3 seconds)
while there are no wire bridges connected and with-
out receiving any digital signals resets the module
to the factory default values:
• two-aspect signal
• own distant signal
• un-coupled
• yard signal logic
• no brake generator
The Control Cycle
After successful configuration the module runs
through a control cycle. All outputs for signal LEDs
are switched on and off one after another. Then all
outputs are switched on one-by-one. After approxi-
mately one second all LEDs are switched off and
the control cycle is completed.

The Viessmann Signal Bus

In modern signal systems the individual signals
are dependent on each other respectively the
aspect of the signal is influenced by the following
signal. In order to simulate this interdependence
the signal are connected via the
nal bus. The signal bus is a separate two-wire ca-
ble and works against the direction of travel.
Transmission of the signal aspect: the signal
bus transmits the signal aspect (the speed on the
main line) to the receiving signal located one block
back. That signal generates the correct aspect for
itself and its distant signal by combining the infor-
mation contained in the command plus the feed-
back from the following signal. If necessary it
changes the signal aspect of both main signal and
distant signal. The command received is in turn
transmitted to the preceding signal and so forth.
The signal bus works with different signal types
and signal generations. Thus no additional circuit-
ry or overriding intelligence is required.
Transmission of track occupancy status: the sig-
nal bus not only conveys the signal aspect but also
the track occupancy status of all track sectors con-
nected to the module or push button inputs. Wit-
hout this information the operation with block sig-
nals (block logic) is not possible.
Branches of the Signal Bus
The Viessmann signal bus can have branches.
Thus the information always travels according to
the set route. Cyclical transmission assures spee-
dy update of status if a new route is switched.
Therefore a home signal always shows the correct
aspect of its distant signal, if the signal bus is devi-
ated parallel to the position of the turnouts or cros-
sings by means of a double-pole relay (see fig. 7).
In the same manner the signal bus can be swit-
ched to match the route for exit signals. The diffe-
GB
Viessmann
sig-
7