| Key | Function | Soundslots | Volume CVs | Volume value | 
|---|---|---|---|---|
| Light | front light on/off | 22 | 427 | 15 | 
| F1 | sound on/off | 1, 2, 24 | 259, 267, 443 | 128, 128, 120 | 
| F2 | long whistle | 3 | 275 | 128 | 
| F3 | short whistle signal | 16 | 379 | 128 | 
| F4 | coal shoveling | 5 | 291 | 60 | 
| F5 | air pump (slow) | 6 | 299 | 75 | 
| F6 | shunting mode | |||
| F7 | curve squeal sound on/off | 15 | 371 | 95 | 
| F8 | AUX1 | |||
| F9 | cylinder blow out | 9 | 323 | 128 | 
| F10 | conductor's signal | 10 | 331 | 60 | 
| F11 | coupler clank | 8 | 315 | 100 | 
| F12 | sanding valve | 11 | 339 | 80 | 
| F13 | set/release brake | 13 | 355 | 90 | 
| F14 | station announcement #1 | 7 | 307 | 100 | 
| F15 | air pump (fast) | 21 | 419 | 75 | 
| F16 | safety valve | 12 | 347 | 128 | 
| F17 | rail clank on/off | 17 | 387 | 85 | 
| F18 | station announcement #2 | 14 | 363 | 100 | 
| F19 | injector | 20 | 411 | 45 | 
| F20 | sound fader | |||
| F21 | disable brake squeal sound |