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Model Railway Control Unit

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6. Conguration

The Z21 signal DECODER can be congured in three different ways:

1. Via the programming button in conguration mode

2. Via the zLink interface using the Z21 per LINK (recommended method).

3. Via POM programming commands

In the interest of ongoing development, we reserve the right to improve and expand the settings and features.

6.1 Conguration via the programming button

If you do not have a Z21 per Link, the most important Z21 signal DECODER settings can also be set via the programming button in the

so-called conguration mode.

To access this conguration mode, the button must be pressed for at least 3 seconds until the white “Program” LED begins to ash.

Then release the button again.

The “Program” LED then displays the currently selected option:

Flashes once in white, option 1: Program address

Flashes twice in white, option 2: Set number of signals

Flashes three times in white, option 3: Set addressing mode

Press and hold the button again for at least 3 seconds to accept the setting and jump to the next option. This is indicated by the blue

LED lighting up. After accepting the last option, conguration mode is exited and all settings are saved.

6.1.1 Option 1 – Program address

This option is used exclusively to program the rst signal address and therefore also the internal decoder address.

1. Keep the programming button held down for at least 3 seconds until the white “Program” LED begins to ash. Then release

the programming button.

2. The white “Program” LED will then ash normally once (short, pause; short, pause; etc.), and the green LED will light up con-

tinuously. The signal decoder is then in “Conguration mode, Option 1”.

3. Now switch a magnet accessory or signal of your choice. The magnet accessory or signal can be switched via the Z21

App or another input terminal, such as the multiMAUS. As soon as the switching command has been interpreted by the signal

decoder, the new address is applied and the conguration mode is exited automatically. The white LED goes out and the blue

LED indicates normal mode.

The addresses are programmed together for all signals, always in ascending groups of four. Each group of four consists of exactly four

consecutive turnout numbers, beginning with 1 to 4, 5 to 8, 9 to 12, 13 to 16 etc. The last programmable group of four ranges from

2037 to 2040.

roco Z21 Signal Decoder User Manual

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