Lifecycle stage and what an EOL listing actually means
The 1FK7011-5AK71-1AG3: The part is recorded with lifecycle stage EOL/HOT, which means the manufacturer has flagged it as reaching end of production while the remaining demand is met through last-time-buy deliveries and the independent distribution channel rather than a normal reorder against the standard catalogue. For a Siemens 1FK7 compact servo, an EOL/HOT status is the usual signal that the firmware-side drive compatibility (SINAMICS S110 / S120 parameter set) and the resolver or encoder feedback option have been frozen at the last shipped revision, so any replacement axis must match the resolver/encoder code in the order string exactly to drop onto the existing commissioning without re-parameterisation.