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Set decoder functions or set PWM frequency¶

Serial command to turn loco decoder functions ON or OFF or set the DC PWM frequency of a track.

Commands¶

loco Required
Loco to set the function or PWM frequency
If function plus state are supplied - To set the function on or off
- *function: Function to set. 0-68 (Support for the RCN-212 Functions)
- state - one of:
  - 1 = on
  - 0 = off
If DCCFREQ plus «freqValue» are supplied - to set the PWM frequency
- «freqValue» = one of:
  - TODO = Mid frequency - 490Hz
  - TODO = High frequency - 3400Hz
  - TODO = Supersonic - 62500Hz

The following are not a direct response, but rather a broadcast that will be triggered as a result of any track manager changes.

<l «loco» «reg» «speedByte» «functMap»>

loco = DCC Address of the decoder/loco. The short (1-127) or long (128-10293) address of the engine decoder (this has to be already programmed in the decoder)
reg not used. We no longer use this but need something here for compatibility with legacy systems. Enter any single digit.
speedbyte:** Speed in DCC speedstep format
- reverse - 2-127 = speed 1-126, 0 = stop, 1 = Emergency Stop
- forward - 130-255 = speed 1-126, 128 = stop, 129 = Emergency Stop
FunctMap individual function states represented by the bits in a byte

Setting requests are transmitted directly to mobile loco decoder.
Current state of loco functions (as known by commands issued since power on) is stored by the CommandStation - All functions within a group get set all at once per NMRA DCC standards.
The EX-CommandStation knows about the previous settings in the same group and will not, for example, unset F2 because you change F1. If, however, you have never set F2, then changing F1 WILL unset F2
<f «loco» «byte1»> is a depricated version of the command. It is not documented here.
<f «loco» «group» «byte2»> is a depricated version of the command. It is not documented here.