Beckhoff EL5032, Документация

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Basics of EnDat 2.2 technology
EL5032, EL5032-0090 30 Version: 2.4
4.2 Connection technology
EnDat02 encoder connection**
EnDat02 encoders can feature a pluggable cable assembly. In choosing the version of the adapter
cable, the customer also decides whether the encoder will be operated with
incremental signals
[
}
28] or without them.**
If an adapter cable without incremental signals is selected for the EnDat-02 measuring device, the
clock frequency of 8 MHz can be implemented and the EL5032 can be used.
**) Source: Dr. Johannes HEIDENHAIN GmbH
Data transfer from incremental or absolute sensors to the EL5032 can take place with a simple shielded 8-
wire cable (Fig.
Connection of measuring sensors and EL5032 ).
Fig. 20: Connection of measuring sensor and EL5032
4.3 Compatibility
The extended interface version EnDat 2.2 is compatible to the previous version 2.1 as regards
communication, the instruction sets and time conditions, but offers considerable advantages. For sample, it
is possible to transmit so-called additional information with the position value without having to start a
separate query for this. To this end the interface protocol has been extended and the time conditions
optimized as follows:
• Increased clock frequency (CLOCK)
• Optimized computing time (determination of position value within 5 µs)
• Minimized dead time (recovery time) (1.25 to 3.75 µs)
• Extended voltage supply range (U
P
= 3.6 to 5.25 V or 3.6 to 14 V at the measuring device)
Fig. Illustration of instruction set for EnDat 2.2 and 2.1** shows the instruction set for the extended EnDat 2.2
interface: