Re: F2 vs Horn button


g_pruss
 

Whether a function key is momentary or not (latching) is dependent on the cab/command station, not the decoder.

A latching function key sends one or more function key packets with a "1" when the key is pressed and released and one or more packets with a "0" when the key is pressed and released a second time.

A momentary function key sends one or more function key packets with a "1" when the key is pressed and one or more packets with a "0" when the key is released.

Some of the DCC controllers allow you to configure the F2 button to be momentary or latching. 

The Horn button in QuantumCVManager TestCabs is momentary: when the Horn button is pressed, packets for F2 = "1" are sent. When the Horn button is released, packets for F2 = "0" are sent. The F2 button is latching: the packets sent have "1" following the odd press/release, and "0" following the even press/release.

Gerry Pruss
QSI

Join QSIndustries@groups.io to automatically receive all group messages.