Number: 4 (coarse) 36 (fine)
Whatever the musician sets this controller to affect. Often, this is used to control the a parameter such as what Aftertouch can. This foot pedal is a continuous controller (ie, potentiometer). If a MultiTimbral device, then each Part usually has its own Foot Pedal value.
14-bit coarse/fine resolution. 0x0000 to 0x3FFF where 0 is minimum effect.