Decoder Programming

LDCC currently supports the following configuration variable (CV) programming modes:

    Direct Mode
  • Paged CV Addressing
  • Physical Register Addressing
  • Address-Only Mode (supported by programming CV #1 using the Physical Register Addressing mode)

Program Configuration Variable

1 - From Stand-by or Run mode, press [VIEW] repeatedly until the programming mode you want is displayed in the LCD:
    Drct Direct Mode Programming
    PHYS Physical Register Programming
    PAge Paged CV Programming
2 - Select the CV you want to program using the remote arrow keys. The A arrows change the hundreds digit, the B arrows change the tens digit and the C arrows change the ones digit.
CV Address
Once you have selected the correct address, Press [P3] to continue.
3 - Enter the value you want to write to the selected CV. Use the arrow keys to change the value.
CV Value (HEX)
By default, the value is entered in hexadecimal (as above). Press [P2] to switch to decimal:

When you have the value entered, press [P3] to write the data. If you have the acknowledgement circuit, you will hear a high tone from the RCX if the write is successful. If you don't have the acknowledgement circuit or a problem occurred, you will hear a low tone.

Continue to step 2 so you can program additional CVs. You can press Stop or Run to exit programming mode at any time.

Read Configuration Variable

If you've built the acknowledgement circuit, you can read CV values from the decoder.
1 - From Stand-by or Run mode, press View repeatedly until the programming mode you want is displayed in the LCD:
    Drct Direct Mode Programming
    PHYS Physical Register Programming
    PAge Paged CV Programming

Then press Prgm, [P1] or [P3] to enter programming mode.

2 - Select the CV you want to read using the remote arrow keys. The A arrows change the hundreds digit, the B arrows change the tens digit and the C arrows change the ones digit.
CV Address
Press P1 to start the read process.

3 - The display will show an incrementing number as LDCC attempts to figure out what value is stored in the CV. When a match is found, you will hear a high tone from the RCX. If there is a problem, nAk will be displayed and a low tone will be heard.

CV Value (HEX)

By default, the value is displayed in hexadecimal (as above). Press [P2] to switch to decimal:

CV Value (Decimal)

Pressing [P1] will take you back to step 2 so you can read another CV. You can modify the value displayed with the remote arrow keys. Press [P3] to write the modified value back to the same CV. Continue to step 2.

Locomotive Options

1 - From Stand-by or Run mode, press [View] repeatedly until Loco is displayed.
Then press [Prgm] or [P1] to enter locomotive options mode.

2 - Select the Loco # using the remote arrow keys or the [Prgm] key:
Loco Number
Press [View] or [P1] to continue.

3 - Modify the decoder address using the remote arrow keys. The valid range is 1 to 127. By default, the decoder address is the same as the Loco #, but you can change this to suit your needs.
Loco Address
Press [View] or [P1] to continue.

4 - Select the speed mode using the remote arrow keys or the [Prgm] key. 14, 28, and 128 step modes are supported. 128 step mode is the default. When you change the mode to 14 or 28, be sure to also program your decoder to use the same mode (you may notice strange headlight behaviour, otherwise).
Loco Speed Table
Press [View] or [P1] to continue.

5 - Select the direction using the remote arrow keys or the [Prgm] key. When r is selected (i.e. reverse), the locomotive's forward and backward directions are reversed.
Loco Direction (Forward)Loco Direction (Reverse)
Press [View] or [P1] to continue back to step 3. You can press [Stop] or [Run] to back out of the options mode at any time.


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