The EnDat story began in 1995 with the introduction of EnDat 2.1. This first EnDat version boasted the following features right from the get-go:
- Automatic system installation
- Electronic ID label
- OEM memory
- Datum shift
- Alarms and warnings
The introduction of EnDat 2.2 in 2003 was marked by the transition to purely serial data transmission and a strong focus on continuity with the previous version. The communication, command sets, and timing conditions of EnDat 2.2 are therefore downward compatible with EnDat 2.1.
For a quick overview:
The Technical Information document “EnDat 2.2: Bidirectional Interface for Position Encoders”