User's Manual

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Decoder for Atlas N Scale H15/16-44 Locomotives

Atlas Model Railroad Co., Inc.

The #520099 DCC decoder is designed for Atlas N scale H15/16-

44 locomotives. The characteristics of this decoder are:

∗ Provides 0.5A continuous motor current.

∗ Has two function outputs with built-in white LED headlights that can be

configured for special effects including directional, independent, dimming,

Mars light, Gyro light, single Strobe, and double Strobe.

∗ Provides two additional function outputs with built-in bi-color LEDs that

provide directional green or red marker lights at front and rear and can be

configured for on/off control by a specified DCC function.

∗ Supports both short (2-digit) and long (4-digit) addressing.

∗ Supports advanced consist control (lashing up locomotives that have

different DCC addresses)

∗ Operates on conventional DC layouts; this feature may be disabled by

setting a CV.

∗ Provides full support for all forms of programming that are described in

NMRA RP-9.2.3.

∗ Supports both short form instructions and long form instructions in

operations mode programming (programming on the main line)

∗ Can be set for operation with 14/27 speed-steps, 28/55 speed-steps, or 128

speed-steps with direct drive.

∗ Can choose either Precision Glide Control or Silent Drive for motor control

DCC Decoder for Atlas N

Scale H15/16-44

Locomotives

Item # 520099

Revised 09/14/2004

Summary of content (18 pages)

PAGE 1
Decoder for Atlas N Scale H15/16-44 Locomotives 1 The #520099 DCC decoder is designed for Atlas N scale H15/1644 locomotives. The characteristics of this decoder are: ∗ ∗ ∗ ∗ ∗ ∗ ∗ ∗ ∗ ∗ Provides 0.5A continuous motor current. Has two function outputs with built-in white LED headlights that can be configured for special effects including directional, independent, dimming, Mars light, Gyro light, single Strobe, and double Strobe.
PAGE 2
Decoder for Atlas N Scale H15/16-44 Locomotives 2 N Scale H15/16-44 DCC Decoder The N-scale H15/16-44 DCC decoder can be used with all popular NMRA-compliant DCC systems. This decoder is in full conformance with all NMRA Standards and Recommended Practices and has been augmented to work well with all major DCC systems on the market.
PAGE 3
Decoder for Atlas N Scale H15/16-44 Locomotives 3 Lighting Options for the H15/16-44 Decoder The H15/16-44 decoder has four function outputs: A, B, C, and D. Decoder outputs A and B are designed to control the white LEDs used for the front and rear headlights, respectively, in these locomotives. The front and rear headlights can be configured by Bit 0 in CV51 to be either directional or independently controlled.
PAGE 4
Decoder for Atlas N Scale H15/16-44 Locomotives 4 Silent Drive or Precision Glide Control The H15/16-44 decoder provides an option to use either Silent Drive or Precision Glide Control for motor control. Silent Drive is best for coreless motors and for applications were you want absolutely silent operation. Precision Glide Control provides much more precise slow speed operation because it pulses the motor to ensure the friction of the motor and drive train does not interfere with the operation.
PAGE 5
Decoder for Atlas N Scale H15/16-44 Locomotives 5 Step by Step Installation Figure 1: Installing the H15/16-44 decoder In the following steps, please refer to the instructions provided with your Atlas locomotive. 1) 2) 3) 4) 5) 6) 7) Remove the locomotive's body shell and fuel tank. Use care so as not to damage any of the fragile parts. Loosen the two screws that hold the frame together; these screws are located at the front and rear of the frame.
PAGE 6
Decoder for Atlas N Scale H15/16-44 Locomotives 6 decoder properties, observe carefully the decoder's behavior while on the isolated 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 programming track and, if necessary, correct any installation errors.
PAGE 7
Decoder for Atlas N Scale H15/16-44 Locomotives 7 Configuration Variables and their Definitions The H15/16-44 decoder supports a full range of features, which are activated by setting Configuration Variables. All CVs are numbered. These numbers are used during programming and are identical for all decoders that conform to NMRA standards, regardless of the decoder manufacturer. The following table lists the CVs supported in the H15/1644 decoder.
PAGE 8
Decoder for Atlas N Scale H15/16-44 Locomotives 8 CV Reg. Description Range 8 8 - 17 - 18 - Manufacturers Identification: This value is the manufacturer ID of the decoder, (Atlas=127). Writing the decimal number “33” to this Register will reset all CVs in the decoder to their factory-default values EXCEPT FOR the speed step settings in CV67 to CV94. Long Address, High Byte The long (also called extended) address, if used, is contained in CV17 and CV18.
PAGE 9
Decoder for Atlas N Scale H15/16-44 Locomotives 9 CV Description Range 29 Bit 1 0,1 50 Headlight mode: 0 = Operation with 14 or 27 speed-step systems. This setting must be 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 speedsteps, and the decoder is set for 14 speedsteps. 1 = Operation with 28, 55 or 128 speed steps.
PAGE 10
Decoder for Atlas N Scale H15/16-44 Locomotives 10 CV Description Range 50 Bit 2 0,1 Bit 3 51 Brake momentum on DC operation. Used to achieve prototypical braking at red signal indications if conventional DC control is disabled. (CV29.2 = 0*) 0 = locomotive proceeds with track-voltagedependent speed inside the conventional DC section. 1 = locomotive brakes in the conventional DC section with preset brake momentum.
PAGE 11
Decoder for Atlas N Scale H15/16-44 Locomotives 11 CV Description 51 Notes for CV51: Bits 4 to 7 of CV51 are effective if and only if CV51.0=1. Dimming is inactive if any of bits 4 to 7 are set to “1.” If more than one of Bits 4 to 7 of CV51 is set to “1,” only the highest numbered of these bits is effective. 0-255 64 Dimming for Output A (front headlight) 52 Range Default ** Value The value in CV52 is used to dim the front headlight.
PAGE 12
Decoder for Atlas N Scale H15/16-44 Locomotives CV Description 57 Bit 3 12 Range Not used Default ** Value 0 Bit 4 0 = No effect 0,1 0 1 = Rear headlight functions as Gyro light (16) Bit 5 0 = No effect 0,1 0 1 = Rear headlight functions as Mars light (32) Bit 6 0 = No effect 0,1 0 1 = Rear headlight functions as single pulse (64) Strobe light Bit 7 0 = No effect 0,1 0 1 = Rear headlight functions as double pulse (128) Strobe light Notes for CV57: Bits 4 to 7 of CV57 are effective if and only if C
PAGE 13
Decoder for Atlas N Scale H15/16-44 Locomotives 13 Converting Binary Values of Individual Bits within a Configuration Variable into the Equivalent Decimal Value of the Entire CV Reasons for Setting and Clearing the Individual Bits of a Configuration Variable To make a DCC decoder perform in the manner that you wish, you sometimes need to set or clear individual bits of a CV.
PAGE 14
Decoder for Atlas N Scale H15/16-44 Locomotives 14 Example: Calculating the Default Value for CV29 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 in CV29 have a default value of binary 0. To compute the decimal equivalent default value of CV29, simply write in the rightmost column of this table the number "2" for bit 1 and the number "4" for bit 2.
PAGE 15
Decoder for Atlas N Scale H15/16-44 Locomotives 15 Creating a Customized Speed Curve Common reasons for specifying a customized speed curve for a DCCequipped locomotive are to: (1) Insure that dissimilar locomotives have the same performance characteristics (2) Have model locomotives perform more prototypically In this example of creating a customized speed curve, we will assume that the H15/16-44 decoder has been properly installed and tested.
PAGE 16
Decoder for Atlas N Scale H15/16-44 Locomotives 16 Table 2: Default Speed Step Values for Decoder in N Scale H15/16-44 Locomotives Speed Step in 14/27 Step Mode 1 2 3 4 5 6 7 8 9 10 11 12 13 14 - Speed Step in 28 Step Mode 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 Internal speed step value (defaults shown) 4 8 12 16 20 26 32 38 44 50 58 66 74 82 90 100 110 120 130 140 152 164 174 186 200 216 234 254 CV 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89
PAGE 17
Decoder for Atlas N Scale H15/16-44 Locomotives 17 Troubleshooting Decoder Programming Problems Fault Locomotive does not move when you 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 short address in CV1. The short address can be read from CV1, and DCC functions can be activated when the DCC system is set to the address in CV1.
PAGE 18
Decoder for Atlas N Scale H15/16-44 Locomotives 18 Atlas Limited One-Year DCC Decoder Warranty Please fill out and mail the warranty card, 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.