Date: 18.12.15
Manual to personal carriage decoder
WD-PW115, WD-PW 170, WD-PW-230, WD-
PW260, WD-PW290
Document: SW 3.0 / 01www.tec4trains.deSeite
28 from 42
Revolutionen im kleinen Maßstab
TCCS-addressing with extended DCC-function addressing
The DCC-protocol has been officially extended in 2006 under the recommendation no. RP 9.2.1.
With this extension, decoders and control centres can exchange up to 32,767 binary states, under the
condition that both units (control centre as well as decoder) have a certain technology.
Especially in case of TCCS this extension is an additional interesting and user-friendly possibility to
trigger the enormous amount of functions that help control a train. Therefore, LD-1x supports the
protocol extension. The potentially available functions correspond with those of the previous chap-
ter. Only the handling of the DCC-control centre is different so that the user can chose himself
which option he prefers. This will highly depend on the type of the used DCC control centre or PC-
software.
The functions are composed in the following way:
1 - 32.767
(amount of available decimal numbers in accordance with RP 9.2.1)
S.FF.PP
(standard format)
S:
represents the traction end of a train with double-ended traction
FF:
represents the function number in the train bus in accordance with TCCS definition
PP
:
represents the vehicle address; 00 stands for broadcast to all vehicles in accordance
with S
The vehicle address in a train set with trains with one-end traction8 is unambiguous; however, for
trains with double endedtraction9 the desired vehicle end (in relation to the train-leading vehicle)
needs to be defined.
45
The following shall be true:
For trains with one-end traction, S can be missing (0). For trains with two-end traction, S needs to
be placed in front of the function number. 1 addresses the train's half on the driver's cab end 1 (in
case of steam engines, the boiler end), 2 addresses the driver's cab end 2 (in case of steam engines,
the tender end). If a broadcast-command is transmitted, S will be evaluated.
If S is missing, it will first be checked whether a train set is coupled to the driver's cab end 1. If so,
the train set will be processed regarding the function number FF and the vehicle address AA without
any test whether there is also a vehicle group coupled to the other end.
The functions are defined in the following way:
4
A train with one-end traction is a train set that has vehicles (car or other locomotives) only on one
end of the train locomotive!
5
A train with two-end traction is a train set that has vehicles (car or other locomotives) on both ends
of the train locomotive.
