Digitrax Hints/DCS Option Switches

DCCWiki, a community DCC encyclopedia.
Jump to: navigation, search

Digitrax Command Stations

Digitrax Command Stations employ Option Switches to cutomise the operation of the command station.

The switch on the front panel must be set to OP to change option switches, with a throttle connected to the command station.

DCS 100/200 Option Switches

Option Switch (OpSw) Effect When Closed Default
01 Do not change t
02 Do not change t
03 DCS100 Auto Reverse Booster t
04 Do not change t
05 Command station master mode (Change to c (Closed)) t
06 Do not change t
07 Do not change t
08 Do not change t
09 Do not change t
10 Do not change t
11 Do not change t
12 Do not change t
13 Locomotive Address Purge Time changes from 200 to 600 seconds t
14 Disable Locomotive Address Purge t
15 Purge will force locomotive speed to zero t
16 Do not change t
17 Automatic Advanced Decoder Assisted (FX) consisting disabled t
18 DCS100: Short Circuit shutdown changes from 125 milliSeconds to 500mS t
19 Do not change t
20 Disable Zero Stretching (Analog) mode t
21/22/23 Global System Default for New Locomotive Selections t
Set OpSw 21/22/232 as follows
t-t-t = 128 steps[1]
t-t-c = 128 step FX mode
c-t-t = 14 step mode
c-c-t 28 step mode
24 Do not change t
25 Disable Aliasing t
26 Enable Routes t
27 Bushby Bit: Disable normal turnout commands to allow a computer to handle turnout logic t
28 Disable DS54 Interrogate commands upon powering up t
29 Do not change t
30 Do not change t
31 Meter route/switch outputs rate when not Motorola Trinary t
32 Do not change t
33 Track Power restored to previous state at power up t
34 Allow Track to power up in RUN state, if set to run prior to power on t
35 Do not change t
36[2] Clear ALL multifunction decoder info and consists t
37[2] Clear ALL routes t
38[2] Clear Locomotive Roster t
39[2] Clear ALL internal memory states, including OpSw 36, 37 & 38 t
40 Do not change t
41 Diagnostic click when valid LocoNet commands incoming & routes being output t
42 Disable three beeps when locomotive address is purged t
43 Disable LocoNet update of command station’s track status t
44 Expand slot refresh area from 22 (Big Boy) to 120 slots t
45 Disable reply for switch state request t
46 Do not change t
47 Program track is brake generator when not used for programming. Braking sets to speed 0 (DCC) (not Emergency stop) for Address 0, light ON, broadcast to all addresses


  • Route: A specified group of turnouts which will be triggered when a command is issued by the throttle. The turnout at the TOP address controls the others to set the route.
  • Aliasing: Aliasing allows operation of a locomotive with a 2 digit primary address using a 4 digit extended address. The DCS100 handles this feature not the decoder. It is no longer supported.
  • Purge: A procedure in which the command station will release locomotives automatically, setting their slot of "Common" from "In–Use". This will occur if they are not under control of a throttle connected to the LocoNet when a time of approximately 200 seconds (~three minutes twenty seconds) elapses. Other operators can take control of the locomotive after purging has occurred. The DCS100 will allow this mode to be extended to 600 seconds (10 minutes) or disabled.


  1. System defaults to 128 speed steps.
  2. 2.0 2.1 2.2 2.3 See your manual for more details on setting these options