servodrive pin assignment

Hello friend,
I'm facing a problem with a servo drives controlled by s7-300 PLC and aSIPRO SIAX 300 panel..
I need to know the meaning the pin assignment of the panel side which controlling the servo drives.The attached image showing the pin symbols and I need to help me to understand these symbols to try to test it !..
Waiting for kind help...

https://www.posital.com/en/products/communication-interface/incremental/incremental-encoders.php

What you have is an incremental encoder. The above link should help you understand the A, B and Z outputs as will as the 90 degree shifting of the outputs.
Regards,