Assuming that you previously had at least Config 1 selected, SRS mode would engage when you selected TOGA. Your FMA would read “MAN TOGA / SRS / GA TRK (or NAV) / ATHR (in blue)
At CLB thrust selection your FMA would read “THR CLB / SRS / GA TRK (or NAV) / ATHR (in white)”
Approaching 2000’ your FMA would read “SPEED / ALT* / GA TRK (or NAV) / ATHR (in white)”
At ALT* your magenta target speed would jump from SRS commanded speed to Green Dot, regardless of the Acceleration Altitude programmed in the MCDU.
FCOM DSC-22-30-40 states that "If the managed speed/Mach target is set above VMAX (VFE, VMO, MMO), the FMGES automatically limits the speed to VMAX"
In theory, if the VFE was below G/D speed, the aircraft would accelerate only to VFE, but the magenta speed target would still show Green Dot. That being said in case of very quick acceleration, or environmental disturbance (turbulence, wind shift etc.), I would think it would be quite easy to exceed VFE.
Last edited by ESCAT; 7th Feb 2018 at 12:07.