Motion controller directly reads absolute encoder signals

beyond_笑谈

Motion controller directly reads absolute encoder signals [Copy link]

I would like to ask if there are any experts who use motion controllers to directly read absolute encoder signals, such as Heidenhain's absolute encoders, as shown in the attached

The motion controller is based on Linux and has a SoftPLC runtime ported to it. The hardware is ARM

lugl4313820

I have only used ordinary encoders. Don’t manufacturers provide drivers for multiple systems now?

ZSZhangSan

Theoretically, it is possible, it depends on whether the hardware conditions are met. According to different Heidenhain protocols, the hardware is configured and the position is read through the instruction set it provides. Logically, it is the same as the servo drive reading the motor encoder. For motion controllers, more IO modules that support communication protocols are developed, such as supporting PN or EtherCAT, treating the encoder as an IO device, developing specific IO modules, and reading the position signal through the module. Then transmit it to the controller through communication. It depends on the planning and design architecture.

beyond_笑谈

The motion controller directly reads the absolute encoder, which means that bus conversion is not required (there are encoders that support the EtherCAT bus on the market, but no additional Ethercat slave is used here), and the encoder signal is directly connected to the motion controller. It is easier to run bare metal or RTOS through a microcontroller, but how to do the motion controller (SoftPLC)? Is the encoder signal reading part made into a dynamic library called by the application or how is it handled?