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Like most DCC Decoders, your MTH PS3.0-equipped engine can be programmed with both Long and Short Address. Short addresses are those from 1-127 and Long addresses are those from 128-9999. You can program the engine address either with Programming on the Main (PoM) or using a Programming Track. Since it's easiest, in most cases, to PoM the instructions will show you how to do it this way. By default, your MTH PS3.0-equipped engine comes programmed with both a long and short DCC address. The default Short address is always 3. The default Long address is 3333.

To change your engine's Short Address using PoM:

  1. Call up the engine's current address on your DCC handheld
  2. Enter Programming on the Main on your DCC handheld]
  3. Enter the new address you want – Remember you can only use address 1-127 for Short Addressing
  4. Once you hit Enter the engine will give you a two whistle/horn blast response
  5. Call up the engine on its new address and away you go

Alternatively, depending upon the type of DCC system you have, you can enter PoM and then write the new address in the Address Menu. This only works for 2 short addressing. For example, on an MRC Prodigy Advance system, you would:

  1. Call up the engine's current address on your DCC handheld
  2. Hit the PROG button twice to enter PoM mode
  3. Hit Enter twice so the LCD displays “Adr”
  4. Type in the new Short Address (1-127) that you want and hit Enter
  5. The engine will give you a two whistle/horn blast response

To change your engine's Long Address using PoM:

  1. Call up the current engine's address on your DCC handheld
  2. Enter Programming on the Main on your DCC handheld
  3. In this step you have to tell the MTH engine that you want it to start looking at long addresses. You do this in CV29:
    1. Bring up the CV menu on your DCC handheld
    2. Enter “29” to edit CV29
    3. Enter “38” to change the value of CV29 and hit Enter
    4. The engine will give you a two whistle/horn blast response
  4. In the following steps you will now need to write values to CV17 and CV18 to tell the engine what the long address should be
  5. Call up CV17 and enter the value required for CV17. You will get a two whistle/horn blast response
  6. Call up CV18 and enter the value required for CV18. You will get a two whistle/horn blast response

In order to determine your required values for CV17 and CV18 you will need to go download the DCC CV17 and CV18 Conversion Spreadsheet

Enter in the long address you want then click anywhere else in the spreadsheet and it will return the values for CV17 and CV18 (it will also return the hex conversion of the CV17 and CV18 values if your DCC system requires this).