You can use cc messages to activate/bypass a factor pedal.
Configure your midi controller to send a specific cc message, say 1 with a value of 0 (bypass) or 127 (activate) on the channel that the factor pedal is listening. Then on the factor pedal go to system->MIDI->Rcv Ctl->ACT and assign that cc number there or use the LEARN function while sending the cc from the midi pedal and the factor pedal will pick it up.
If you have more than one factor pedal you can assign different cc messages to ACT[ivate] on each one. In my case I send cc1 to my PF, cc2 to the MF and cc3 to my TF. A value of 0 for these messages will bypass the pedal, a value of 127 (probably anything but 0) activates it.
Hope this helps.
Tommi
