Try analog signals only

If you do have an encoder with BISS C interface and analogue signals you may choose a setup without using the digital interface. Choose "Unknown/ 1Vpp..." with the correct sense settings and resolution.

Try analog signals only 1:

If you get errors related to the sense line (e.g. F705, F707, F879,...), please double check the wiring of the sense lines or choose a setting without sense line ("5Vfixed"). If you do not get erros related to the power supply but to the signal amplitude, check wiring of the sine/ cosine signals. If possible you may use a hardware oscilloscope to look at the signals.

Try analog signals only 2:

If the AX5000 senses a feedback error it switches the encoder power supply off!

When you get correct 1Vpp signals, i.e. no error related to that, you may double check the resolution: Does the position count one revolution when you turn the encoder one rev.? Dou you see the correct distance when you move the linear encoder?