Atlas Saw 447299 User Manual

Atlas #544099 and #447399 DCC Decoders  
1
The Atlas #544099 and #447399 DCC Decoders are factory-installed in  
Atlas N scale DCC-equipped SD-24 and SD-26 locomotives. The  
#544099 decoder is used in locomotives with high hoods; while the  
#447399 decoder is used in locomotives with low hoods.  
The principle features of these decoders are:  
Extended (4-digit) addressing  
Advanced consist control (lashing up locomotives that have  
different DCC addresses)  
Will operate on conventional DC layouts; this feature may be  
disabled by setting a CV.  
Supports the forms of DCC programming described in  
NMRA RP-9.2.3.  
Both short form instructions and long form instructions  
supported in Operations Mode programming (programming  
on the mainline)  
Settable for operation with 14/27 speed-steps, 28/55 speed-  
steps, or 128 speed-steps with direct drive  
Directional headlights  
Atlas Low Profile #544099  
and #447299 DCC Decoders  
for N Scale Locomotives  
Item Nos. 544099 and  
447399  
Revised 03/08/2005  
Atlas #544099 and #447399 DCC decoders are in conformance with  
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Atlas #544099 and #447399 DCC Decoders  
3
internal safeguards to prevent damage, you must not allow any metal  
part of the locomotive to touch surface components of the decoder other  
than the pickup pads on the decoder that connect to the wheel-sets, the  
headlights, and the motor brushes. Any contact to other parts of the  
decoder can cause a direct internal short circuit and destroy the  
DCC decoder.  
The Atlas #544099 and #447299 DCC decoders are not completely  
protected against static electricity and have sensitive electronic parts.  
When installing one of these decoders in your N scale locomotive, it is  
recommended that you wear a grounded anti-static wrist strap. Also be  
careful in handling the decoder, especially in the area around the top  
rear part of the decoder (the area where the microprocessor is located).  
All Atlas #544099 and #447299 DCC decoders come with  
two LED headlights already installed. The light outputs of  
these decoders are designed only to drive these LED  
headlights. The Atlas warranty is void if the LEDs are  
removed from the decoder PC board.  
Step by Step Installation  
In the following steps, please refer to the instructions provided with your  
Atlas locomotive.  
1) Remove the locomotive's body shell. Use care so as not to  
damage any of the fragile parts.  
2) Loosen the two screws that hold the frame together; these screws  
are located at the front and rear of the frame.  
3) Carefully remove the lighting control circuit board, which is located  
at the top of the frame.  
4) Place the decoder between the two halves of the frame so that the  
decoder label is at the top of the board and the two motor pads are  
at the bottom of the decoder. These motor pads will connect with  
the two copper motor contacts when the decoder installation has  
been completed.  
5) Carefully press the two frame halves together, with the sides of the  
decoder inserted into the notches in the two halves of the frame.  
Some pressure is needed to press the two frame halves together.  
This pressure fit insures good electrical contact between the frame  
and the decoder.  
6) Tighten the two screws that hold the locomotive frame together.  
7) Carefully check to make sure that the motor contacts are not  
touching either half of the frame. It is necessary to look down from  
the top through the frame cutouts in order to check for such  
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Atlas #544099 and #447399 DCC Decoders  
unwanted shorts,  
4
There must be NO electrical contact between the motor  
contacts and any part of the frame  
Place the locomotive (without its plastic body) on your DCC  
programming track and read back the locomotive's address from the  
decoder. If the decoder is properly installed, you will be able to read  
back the factory pre-set address 03. If your system does not support  
reading decoder properties, observe carefully the decoder's behavior  
while on the low current programming track. Each time you try to  
program the decoder you can see the acknowledgement that is sent by  
the decoder in the form of a brief and minor jerk of the locomotive. A  
successful acknowledgement means that you have installed the decoder  
correctly.  
Remove the locomotive from the track and, if necessary, correct any  
installation errors. Once you have successfully programmed the  
decoder, reinstall the plastic body and retest the locomotive on the  
programming track. If this test is successful, the locomotive is ready to  
use.  
Programming Atlas #544099 and #447299  
DCC Decoders  
Atlas #544099 and #447299 DCC decoders support service mode and  
also operations mode programming.  
Using these programming  
methods, many features (such as the locomotive's address,  
acceleration, and configuration) can be customized to the individual  
locomotive in which the decoder is installed. The properties will be  
saved in non-volatile memory locations on the locomotive decoder so  
that they will retain their values even after the power has been removed.  
The values are set electronically, which means that the locomotive does  
not need to be opened again after the decoder has been installed in  
order to read or modify the values of these so-called Configuration  
Variables (CVs). DCC decoders have a total of 128 CVs. Not all of these  
CVs are used at this time since many have been reserved for future  
use.  
All NMRA-compliant DCC Command Stations can be used to program  
Atlas #544099 and #447299 DCC decoders. With several entry-level  
systems, only CV #1 (the locomotive address) can be set unless you  
use a separate DCC programmer. More advanced DCC systems  
support the ability to set many more CVs.  
This decoder is most readily programmed in either Direct Mode on  
the programming track or in Operations Mode on the main track.  
The specific details for reading and writing Configuration Variables with  
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Atlas #544099 and #447399 DCC Decoders  
5
your DCC system are specified in the user manual of the particular  
system that are using. Note: In order for newly programmed CV values  
to take effect after service mode programming, the decoder must go  
through a power reset. If your DCC command station does not support  
automatic power reset, simply rock the locomotive off the track after  
programming.  
Configuration Variables  
Atlas #544099 and #447299 DCC decoders support a range of features,  
which are activated by setting configuration variables. All the  
configuration variables are numbered. These numbers are used during  
programming and are identical for all decoders that conform to the  
NMRA standards, independent of the decoder manufacturer. The  
following table lists the CVs supported in Atlas VO-1000 DCC decoders.  
Both CV numbers and Register numbers are provided for cross-  
reference.  
Some CVs (such as CV29) have specific meanings for each bit. In  
order to conform to the NMRA convention for bit numbering, the bit  
assignments shown in this table use the bit-numbering scheme of 0 to 7.  
Table 1: Configuration Variables (CVs) for Atlas  
#544099 and #447299 DCC decoders  
CV Reg.  
Description  
Range  
Default  
Value**  
3
1-127  
1
2
1
2
Short locomotive address:  
This is the (2-digit) number used to specify to the  
DCC system the locomotive that you wish to run.  
1-15  
1-31  
1-31  
0-39  
10  
1
Start voltage:  
This is the voltage applied to the motor in speed-  
step 1. Set this value so that the locomotive just  
starts moving in speed-step 1.  
3
4
5
3
4
5
Acceleration Momentum:  
Determines the rate of change of speed upon  
acceleration. A higher value leads to a slower  
acceleration.  
1
Brake Momentum:  
Determines the rate of change of speed upon  
braking. A higher value leads to longer braking  
distances.  
6
Contains CV29 (see definition of CV29 below)  
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6
CV Reg.  
Description  
Range  
Default  
Value**  
46  
-
7
8
7
8
Version Number:  
This location stores the version number of the  
decoder. This CV is read-only.  
-
127  
1
Manufacturers Identification:  
This value is the manufacturer ID of the decoder,  
(Atlas=127). This location is read only. Writing  
decimal “33” to this CV while the locomotive is  
on the programming track and then briefly  
removing the locomotive from the programming  
track will reset all CVs to their default values.  
-
-
192-  
231  
0-255  
0
0
17  
18  
Extended Address High Byte  
Extended Address Low Byte  
The two-byte (4 decimal digits) address, if used,  
is contained in CV17 and CV18.  
-
0-255  
0
6
19  
29  
Consist Address  
The advanced consist address, if used, is stored  
in CV19. (In Atlas Commanders, allowable range  
is 1-99.)  
0-55  
Decoder Configuration, Byte 1:  
Several decoder properties are set with CV29.  
Changes are easiest if done in binary mode, but  
can also be done by adding together the decimal  
values (shown in parenthesis) for all the desired  
features and writing the total into CV29. (For an  
example, see the section of this manual that is  
entitled Converting Values of Individual Bits  
within a CV into an Equivalent Decimal Value for  
the Entire CV.)  
The definitions for the individual bits of CV29 are  
given below.  
Bit 0  
0,1  
0
Locomotive direction:  
This bit sets the direction that the locomotive will  
move when told to move forward in digital mode.  
(1)  
0 = locomotive’s direction is normal  
1 = locomotive’s direction is inverted  
1
This DCC decoder was designed for Atlas by Lenz GmbH  
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Atlas #544099 and #447399 DCC Decoders  
7
CV  
29  
Description  
Headlight mode:  
Range  
Default  
Value**  
1
Bit 1  
0,1  
0 = Operation with 14 or 27 speed-step  
systems. This setting is selected when the  
locomotive decoder is used with any DCC  
system that does not support the 28 speed-  
step mode. If the headlights turn on and off  
as the speed is increased, the command  
station is configured for 28 speed-steps, and  
the decoder is set for 14 speed-steps.  
1 = Operation with 28, 55 or 128 speed  
steps. If you use this setting, the Command  
Station must also be configured to use either  
the 28 speed-step mode or the 128 speed-  
step mode; otherwise, the headlights cannot  
be controlled.  
(2)  
Bit 2  
0,1  
1
Usage on conventional DC layouts:  
0 = locomotive operates in digital (DCC)  
mode only  
(4)  
1 = locomotive can operate on either  
conventional DC or on DCC  
Bit 3 Both bitts always 0  
Bit 4  
0
0
0
Bit 5  
0-1  
Extended Addressing:  
0= Normal (single byte) addressing  
1=Two byte extended addressing  
Bit 6 Both bits always 0  
Bit 7  
(32)  
0
0
0 or 4  
0
50  
Decoder Configuration, Byte 2:  
CV50 is similar to CV29, but CV50 is used to set  
other properties. The definitions for the individual  
bits of CV50 are given below.  
Bit 0 Both bits always 0  
0
0
Bit 1  
Bit 2  
0,1  
0
Brake momentum on DC operation.  
Used to achieve prototypical braking at red  
signal indications if conventional DC control  
is disabled. (CV29.2 = 0*)  
(4)  
0 = locomotive proceeds with track-voltage-  
dependent speed inside the conventional.  
DC section.  
1 = locomotive brakes in the conventional DC  
section with pre set brake momentum.  
Bits Not used, always 0  
3-7  
0
0
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Atlas #544099 and #447399 DCC Decoders  
8
CV  
51  
Description  
Range  
Default  
Value**  
0
0-255  
DCC Function Used to Dim Headlights  
The active headlight (front headlight if locomotive  
direction is set to forward and rear headlight if  
direction set to reverse) may be dimmed by a DCC  
function if and only if Function F0 is set to ON and at  
least one of the bits of CV51 is set to the binary  
value “1.” The DCC function to be used to dim the  
headlights is specified by the bit of CV51 (bit 0 to bit  
7) that is set to the binary value “1.”  
If two or more bits of CV51 are set to binary value  
“1,” all DCC functions corresponding to those bits set  
to “1” can be used to dim the headlight. To avoid  
unneeded use of DCC functions, it is recommended  
that only one bit in CV51 be set to “1.”  
The amount of headlight dimming is determined by  
the value in CV52.  
Bit 0  
Bit 1  
Bit 2  
Bit 3  
Bit 4  
Bit 5  
Bit 6  
0,1  
0,1  
0,1  
0,1  
0,1  
0,1  
0,1  
0,1  
0-255  
0
(1)  
0
(2)  
0
(4)  
0
(8)  
0
(16)  
0
(32)  
0
(64)  
0
(128)  
255  
CV51.0=1: Function F1 controls dimming  
CV51.1=1: Function F2 controls dimming.  
CV51.2=1: Function F3 controls headlight  
dimming  
CV51.3=1: Function F4 controls headlight  
dimming  
CV51.4=1: Function F5 controls headlight  
dimming  
CV51.5=1: Function F6 controls headlight  
dimming  
CV51.6=1: Function F7 controls headlight  
dimming  
Bit 7 CV51.7=1: Function F8 controls headlight  
dimming  
Amount of Headlight Dimming.  
52  
For noticeable headlight dimming, CV52 should be  
set to a mid-range value, such as decimal 64.  
Using the value 0 for this CV results in a completely  
dark headlight when the headlight is dimmed.  
Using the decimal value of 255 for this CV results in  
no difference is brightness between a dimmed and a  
non-dimmed headlight.  
* The notation CVx.y = z means that bit y of CVx has the value z. For  
example, CV29.2 = 0 means that bit 2 of CV29 has the value ”0.”  
** In the Default Value field, the numbers shown in parenthesis () are the  
decimal values that must be written into a CV for the specified bit of that  
CV to have the value “1.”  
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Atlas #544099 and #447399 DCC Decoders  
9
Converting the Binary Values of Individual  
Bits within a Configuration Variable into an  
Equivalent Decimal Value for the Entire CV  
Reasons for Setting and Clearing the Individual Bits of a  
Configuration Variable  
In order to make a DCC decoder perform in the manner that you wish it  
to perform, one must sometimes set or clear individual bits of a CV. To  
program a DCC decoder using a DCC system that allows only the  
writing of decimal values into CVs (such as the Atlas Master  
Commander), it is first necessary to convert the values of all the  
individual bits of that CV that are to be set to the binary value 1 into their  
equivalent decimal values. It is then necessary to add together all of  
these equivalent decimal values.  
Procedure for Converting Individual CV Bit Values into a  
Decimal Equivalent Value for the CV  
The following table illustrates how to calculate the decimal value that  
must be written into a CV in order to set and/or clear a specified set of  
individual bits within that CV.  
Each bit of a CV that is to be set to the binary  
value “1” can be represented by the equivalent  
decimal number shown in the second column of  
this table. To determine the equivalent decimal  
value to be written into the CV, first write down  
in column 3 of this table the decimal equivalent  
values of all the bits of the CV that are to be set  
to a binary 1. Write nothing in column 3 for  
each bit of the CV that is to be cleared, i.e., set  
to a binary 0. Then add up all the numbers that  
you have written down in column 3. The sum  
that you get is the equivalent decimal value that  
you need to write into the CV.  
Bit  
Decimal  
Decimal  
Values for  
CV  
Number  
Equivalent  
Calculation  
0
1
2
3
4
5
6
7
1
2
4
8
16  
32  
64  
128  
SUM:  
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Atlas #544099 and #447399 DCC Decoders  
10  
Example: Calculating the Default Value for CV29  
Bit  
Number  
Decimal  
Equivalent  
Decimal  
Values for  
CV  
From the definition of CV29 given in Table  
1, we see that the default values of bits 1  
and 2 are binary 1s; whereas, all other bits  
Calculation  
0
1
1
2
in CV29 have a default value of binary 0.  
2
4
In order to compute the decimal equivalent  
default value of CV29, simply write in the  
rightmost column of this table the number  
"2" for bit 2 and the number "4" for bit 3.  
Then add up all the non-zero numbers that  
you have entered into this rightmost  
column. Since the sum of these numbers  
is 6, the decimal number to be  
2
3
4
5
6
7
4
8
16  
32  
64  
128  
programmed into CV29 is 6.  
SUM:  
6
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11  
Troubleshooting Decoder Programming Problems  
Fault  
Cause and Solution  
Locomotive does not  
move when you  
Check to see if you have selected the correct address for that  
locomotive.  
address it on DCC  
system.  
Locomotive does not  
move when DCC  
system is set to the  
address in CV1, even  
though this address can  
be read from CV1.  
Locomotive does not  
move when DCC  
system is set to the  
address in CV1, even  
You have used the single-byte address (CV1), but the decoder is  
still set to the extended (two-byte) locomotive address, i.e., bit 5 of  
CV29 has been set.  
Use the extended address or else clear bit 5 of CV 29.  
Check whether to see if a consist address has been programmed  
into CV19, i.e. check to see whether or not CV19 has a value  
greater than 0. If CV19 has a non-zero value, you must either use  
this consist address to operate the locomotive or else program the  
though this address can value 0 into CV19.  
be read from CV1 and  
DCC functions can be  
activated when DCC  
system is set to the  
address in CV1.  
Function 0 (lighting)  
cannot be switched on  
and off.  
Matching of speed steps is incorrect: The decoder has been set to  
28/128 speed steps, but the DCC system has been set to 14/27  
speed steps.  
Either set the DCC system to 28 or 128 speed steps or else change  
the decoder speed step setting to 14/27 speed steps. (CV29.1 = 0).  
Matching of speed steps is incorrect: The decoder has been set to  
14/27 speed steps, but the DCC system has been set to 28 or 128  
speed steps. Either set the DCC system to 14/27 speed steps or  
else change the decoder speed step setting to 28/128 speed steps.  
(CV29. 1 = 1).  
Locomotive headlights  
are only illuminated  
when the locomotive  
speed is increased or  
decreased; the  
locomotive headlights  
go on and off as the  
locomotive speed  
changes.  
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Atlas #544099 and #447399 DCC Decoders  
12  
Atlas Limited One-Year DCC Decoder Warranty  
Please fill out and mail the Warranty card on the reverse side,  
within 30 days of purchase. Atlas Model Railroad Company, Inc.  
warrants that this decoder will be free from defects in material  
and workmanship for a period of one year from the date of  
purchase. If this decoder fails during the warranty period,  
uninstall and carefully pack the item in the original carton,  
together with the dated sales receipt, and return to  
Atlas Model Railroad Company  
Attention DCC Repair  
378 Florence Avenue  
Hillside, NJ 07205.  
Defects due to misuse, improper maintenance and/or abuse are  
not covered by the warranty. This warranty gives you specific  
legal rights and you may also have other rights, which vary from  
state to state.  
For Technical Assistance  
This equipment complies with Part 15 of FCC Rules. Operation is subject to the  
following two conditions: (1) this device may not cause harmful interference, and  
(2) this device must accept any interference received, including interference that  
may cause undesired operation.  
Please save this manual for future reference.  
Lenz GmbH designed these DCC decoders for Atlas Model Railroad Co., Inc.  
© 2005 Atlas Model Railroad Co, Inc; All Rights Reserved.  
Atlas Model Railroad Co., Inc.  
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