Ethercat Servo+Glas scale = clods loop

Hello, I'm currently facing a small problem. I want to monitor my servos (Stepperonline A6 750w), which are operated via EtherCAT, using a closed loop. Currently, I only get feedback from the motor encoders, but I already have glass scales installed. Now I'm trying to link them so that the glass scales work together with the servos via PID (the scales are triggered by the Beckhoff EL5101).
Regards, Tom

I think your motor encoder feedback needs to go into your motor driver while the glass scale quadrature signals into linux CNC PID module.