多摩川17bit绝对值编码器的NRG协议文档，配合上传的解码源程序，采用半双工的通信模式。,Tamagawa 17bit absolute encoder NRG agreement documents, with the upload source decoder, using half-duplex communication mode.

海德汉最新的ENDAT2.2协议规范，用于单圈和多圈的绝对值编码器上。-Heidenhain ENDAT2.2 the latest protocol specification for single-loop and multi-ring on the absolute value encoder.