ZIMO MX695, Инструкция по эксплуатации

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Large-scale Decoder & Sound Decoder MX695, MX696, MX697, MX699 Page 41
6
Feedback
– Bidirectional communication
All ZIMO decoder types have been equipped with a type of feedback ever since DCC was
formed, which has always been a major difference to competitors’ products:
- the
ZIMO loco number identification
is part of ZIMO DCC decoders since 1997
and as far back as 1990 with ZIMO’s own data format (which is no longer in use today). It
can only be used with ZIMO DCC systems (MX1…MX10, MX31ZL, MX32ZL…) and together
with ZIMO track section modules (MX9 and successors): After receiving DCC packets, the
decoder sends acknowledgment pulses which will be utilized to identify and locate the de-
coder in the respective section of track.
- all ZIMO decoders are ready for the
“bidirectional communication”
ac-
cording to
“RailCom”
since 2004; it is opertional in newer decoders
such as the MX695, MX6
96… series from the beginning (basic functions,
ongoing expansion with future software updates).
“Bidirectional” means that the information transfer within the DCC protocol is not only flowing towards the
decoder but also in the opposite direction; that is, not just driving, function and switch commands are be-
ing sent to decoders but also messages such as acknowledgements, actual speed as well as other status
information and CV read-outs are being received from decoders.
The functioning principle of RailCom is based on the introduction of short cut-outs (max. 500 micro sec-
onds) by the command station to the otherwise continuously sent DCC signal. These cut-outs provide the
time and opportunity for the decoders to send a few bytes of data to locally mounted detectors.
The relevant CV’s for RailCom configuration:
CV Designation Range Default Description
#28 RailCom Configuration 0 - 3 3
Bit 0 - RailCom Channel 1 (Broadcast)
0 = OFF
1 = ON
Bit 1 - RailCom Channel 2 (Data)
0 = OFF
1 = ON
#29
Grundeinstellungen
Configuration data
0 - 63
14 =
0000
1
110
Which is
Bit 3 = 1
(“RailCom“
turned on)
Bit 0 - Train direction:
0 = normal, 1 = reversed
Bit 1 - Number of speed steps:
0 = 14, 1 = 28
Bit 2 - DC operation (analog):
0 = off 1 = on
Bit 3 -
RailCom (“bidirectional communication“)
0 = deactivated 1 = activated
Bit 4 - Individual speed table:
0 = off, CV # 2, 5, 6, are active.
1 = on, according to CV ‘s # 67 – 94
Bit 5 - Decoder address:
0 = primary address as per CV #1
1 = ext. address as per CV #17+18
#136
Setting the feedback
speed
RailCom
display
factor
128
Correction factor for the speed feedback
via RailCom
or (see section 5.8)
A value can be read out here after a calibration run
has been performed.
#158
Several special bits +
RailCom variants
0 - 127 4
Bit 0, Bit 1, Bit 6 various special sound settings
Bit 2 = 0: RailCom speed (kph)
– feedback using the
“old” method (for MX31ZL ! Id 4)
= 1: RailCom speed (kph)
– feedback using the
new STANDARDIZED method (Id 7).
With the help of bidirectional communication according to RailCom
decoders will acknowledge received commands -
- which increases operational reliability and the bandwidth of DCC systems because already
acknowledged commands don’t need to be sent repeatedly;
current decoder data is sent to the command station (“global detector”) -
-
e.g. “real” (measured) train speed, motor load, routing and position codes, “fuel reserves”,
current CV values on demand from decoders is sent to the command station or more precisely,
to a
global detector in the command station;
decoder addresses are recognized by “local” detectors -
- the actual loco positions are determined by local detectors connected to individual track sec-
tions (integrated in future MX9 track section modules), which has been possible with ZIMO’s
own loco number recognition for a long time, even without bidirectional communication.
RailCom will be further developed over the coming years and new applications added which of
course requires new software updates in decoders and other equipment. ZIMO decoders as of
2009 are able to send their own loco address from an isolated section of track (with a so called
broadcast method, very fast, although only for one loco inside that section), send CV content
on demand along with some decoder data such as actual speed in kph, load and decoder
temperature.
On the system side, only one third party product has been available from the beginning
– the
address display LRC120, which is a “local” RailCom detector displaying the loco address of
one track section. In 2007, the ZIMO MX31ZL came to market as the first command station
with a
n integrated “global” RailCom detector.
In 2014 (4. Quarter), ZIMO will deliver the new MX10 command stations with integrated detec-
tors for RailCom. The MX32 cab (released early in 2011) uses feedback functions from the
start (speed indicator, CV-reading), but until the appearance of the MX10 it is accessible only
in connection with the MX31ZL.
RailCom in ZIMO Decoders is activated with
CV #29, Bit 3 = 1
AND
CV #28 = 3
These are usually the default settings on a new decoder, but RailCom is turned off by default
in many sound projects or OEM CV sets and must therefore be activated first with above CV’s
(see table above).
ATTENTION (if the actual speed is not displayed): see CV #158, Bit 2 (in table above).
“RailCom“ is a registered trademark of Lenz Elektronik GmbH.