Digital drive systems and feedback loops with position encoders for measured value acquisition require
fast data transfer
with
high
transmission reliability from the encoders.
Further data, such as
drive-specifi c parameters, compensation tables,
etc. must also be
made available. For high system reliability, the encoders must be integrated in routines for error detection and have
diagnostic
capabilities.
The EnDat interface from HEIDENHAIN is a digital, bidirectional interface for encoders. It is capable both of transmitting position values
from incremental and absolute encoders as well as transmitting or updating information stored in the encoder, or saving new information.
Thanks to the serial transmission method, only four signal lines are required. The data are transmitted in synchronism with the clock
signal from the subsequent electronics. The type of transmission (position values, parameters, diagnostics, etc.) is selected through
mode commands that the subsequent electronics send to the encoder. The EnDat 2.2 interface, a purely serial interface, is also suited for
safety-related applications.
Technical Information
EnDat 2.2 – Bidirectional Interface for Position Encoders
Power supply
CLOCK
16 MHz
DATA
Position values, parameters, datum shifts,
electronic ID label, diagnostics, warning, etc.