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Model Railway Control Unit
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5. Operation on control centres from other manufacturers
INFORMATION: When using control centres from other manufacturers, set the turnout addressing of the Z21 switch DECODER
to “RCN-213”! To congure the addressing mode, see section Option 3 – Set addressing mode.
The Turnout addressing denes the method used to calculated the turnout numbers from the switch decoder address: Each switch
decoder address is assigned precisely 4 turnout numbers. The 10836 Z21 switch DECODER even occupies two switch decoder ad-
dresses internally to be able to control 2 x 4 = 8 turnouts.
Most user interfaces only display the turnout numbers and not the actual switch decoder address. This switch decoder address is still
only used in the background for communication between the DCC control centre and the turnout decoder, however. For this to function
without problems, however, both sides, control centre and decoder, must use the same type of turnout addressing. Unfortunately, due
to a weak spot in the older DCC specications over time, different methods for calculating the turnout numbers from the switch decod-
er address have arisen. Only the RailCommunity standard RCN-213 (“DCC protocol operating commands for accessory decoders”)
has dened since 2014 the calculation of the turnout number from the decoder address in an unique way.
To be backwards-compatible with existing systems, as well as conform to the standard RCN-213, the Z21 switch DECODER offers ad-
justable turnout addressing:
• Turnout addressing “ROCO” for the purposes of backwards compatibility with Z21, multiZENTRALEpro and multiMAUS with
booster. This is the factory setting.
TIP: Visual inspection on the 10836: The green “Data” LED is switched off in normal operation and only lights up briey
whilst the switch decoder is receiving data or commands.
• Turnout addressing “RCN-213” for the purposes of better compatibility with the current standard RCN-213 and with control
centres from other manufacturers.
TIP: Visual inspection on the 10836: The green “Data” LED is inverted, meaning in normal operation it remains switched on
and only goes out briey whilst the switch decoder is receiving data or commands.
TIP: This setting also even functions with the Z21 if it has also been set to “RCN-213” in advance using the “Z21 Maintenance
Tool” (PC) or wlanMAUS.
The setting of the turnout-addressing relates primarily to …
• … switch commands: correct and consistent allocation of the turnout numbers to switch decoder address and output.
• … POM configuration commands: the POM programming commands function correctly for switching accessory decoders
with control centres from other manufacturers when the “RCN-213” setting is used.
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