LocoNet Interface Tab

The interface setup depends on the type of LocoNet connection: RS232, USB or Socket.
An USB LocoBuffer maps on Windows as a virtual COM-port and on Linux as a USB serial device like /dev/ttyUSB0.
The MS100 interface could cause some problems on your serial hardware because of the odd baudrate. A LocoBuffer provide baudrates which are common on all hardware.


The following types of LocNet devices are available:

Throttle updates

Some throttles, like the Uhlenbrock IB and Fleischmann Profi-Boss, do not set a throttle ID in the LocoNet packet.
To enable updates in Rocrail and clients the following option must be set: Allow zero throttle ID

Local IP

LNUDP only
Interface address to use if the computer has more then one network card installed.
In all other cases: Leave empty.

CTS Flow

This option should not be unchecked unless the manufacturer advices this to get things working.
Unchecking this options can lead to buffer overflows and uncontrolled running trains in auto mode and is therefore excluded from any support.

Ignore power commands

Use with dedicated LocoNet segments with only LocoIO connected.
This option prevent sending sub sequential Power OFF/ON commands to avoid unwanted sensor reporting at re-power ON. Specially useful with large layouts.
:!: This option has been moved to Command Stations and must be set again.


Support for the Blücher GBM16xn modified LocoNet OPC_MULTI_SENSE reporting:

  • 8 bit loco addressing only
  • direction flag

LocoNet Options Tab

A list of options depending of the Command Station you selected in the combobox. Check your manual for a detailed explenation of the option switches.
Changes made here can be activated after leaving the RocrailIni Dialog with OK and by checking the Store options checkbox.
Select DCS100 if you have a DCS200 because they share the same options.

LocoNet Details Tab

Reset Lissy/RFID

Reset automatically Lissy and RFID events after 1 second.

Check switch acknowledge

If the CS cannot process a switch command it will respond with a negative acknowledge.
If this option is activated the switch command will be resend after 50ms at a max. of 10 times.
This option is only usable with 100% compatible LocoNet Command Stations. (Won't work with the IB.)


Number of retries to send the switch command successfully.


Number of ms between the retries.

Purge time and Slot ping

After an mobile decoder idle time the LocoNet CS will purge a decoder address automatically. To prevent this Rocrail can ping the respective address before the end of this idle time if the “Slot ping” option is enabled.
A value of zero, the CS is supposed not to purge, will lead to unpredictable situations: Rocrail will not check with the CS if the known slot is purged.
Very small purge time values will cause unnecessary traffic for checking the slots.

A LocoNet CS purges¹ to make room for new addresses which make sense if it has only a small stack for concurrently active mobile addresses.
¹) Purging an address will remove it from the DCC refresh stack; so no more packets are generated for this address.

Query address

The standard query address for getting the current sensor state is 1017.
For Uhlenbrock sensor modules this must be set to 1016.

Wait for slot data

The number of seconds to wait for a reply from the Command Station on a slot request.
Some LocoNet compatible Command Stations need more time to be able to respond on slot requests, and in that case this value should be increased.

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