As it seems you are using version 1.20 of the ctrlX OS. In this version you need to add the axis in reference bit (S-0-0403 bit 0) to the cyclic data to have it available in the ctrlX CORE and read it e.g. via the data layer realtime node in the PLC.
From version 2.6 on the information can be found in the CXA_MotionInterface: arAxisStatus_gb[1].Data.DeviceStatus.Homed
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