Atlas 520099 Reg Description Range Default Value Short address, Start voltage, Brake Momentum

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 H15/16- 44 decoder. Both CV numbers and Register numbers are provided for cross-reference.

Some CVs (such as CV29) have specific meanings for each bit. To conform to the NMRA convention for bit numbering, the CV bit assignments shown in this table use the bit-numbering scheme of 0 to 7.

Table 1: Configuration Variables (CVs) for the H15/16-44 Decoder

CV	Reg.	Description	Range	Default
				Value**
1	1	Short address:	1-99	3
		This is the number that you enter into your DCC
		system to tell it which locomotive you wish to run
		with a short (2-digit) address.
2	2	Start voltage:	0-31	8
		This is the voltage applied to the motor in speed
		step 1. Set this value so that the locomotive is
		barely moving in speed step 1.
3	3	Acceleration Momentum:	1-255	1
		Determines the rate of change of speed upon
		acceleration. A higher value leads to a slower
		acceleration.
4	4	Brake Momentum:	1-255	1
		Determines the rate of change of speed upon
		braking. A higher value leads to longer braking
		distances.
-	5	Contains CV29 (see definition of CV29 below)	0-55	6
-	6	Page Register:	0-127	1
		Normally this Register is not modified directly by
		a user. For correct operation, R6 should be set to
		have the value “1” after any use.
7	7	Version Number:	-	46
		This location stores the version number of the
		decoder. This CV is read-only.
		Atlas Model Railroad Co., Inc.