January 2012 2.4 General Information 81
The MC is connected to the CC controller unit, the MB machine operating
panel and the PL 6xxx PLC input/output systems via HSCI (HEIDENHAIN
Serial Controller Interface). The connection of the various control components
via HSCI offers numerous benefits, including:
Simple and uncomplicated wiring
High noise immunity
Simple commissioning
Comprehensive yet straightforward possibilities for diagnostics
The TNC 620 is prepared for the connection of incremental and absolute
position and shaft-speed encoders. EnDat 2.2, which is purely digital and
compatible to version 2.1, makes it possible to very rapidly transmit highly
resolved position values over long cable lengths. An overview of EnDat 2.2:
DATA
DATA
CLOCK
CLOCK
5
5 V
U
N
U
P
*)
U
N *)
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