Introduction
Incremental encoder interface
The EJ5021 EtherCAT plug-in module is an interface for direct connection of a measuring probe or encoder with sinusoidal, differential voltage output 1 VSS. Input frequencies of max. 250 kHz can be evaluated.
The current counter value can be zeroed (reset) or stored separately via the C track of the encoder, which is also called reference mark.
The encoder is supplied with 5 V directly via the signal distribution board. The 5 V encoder operating voltage is generated from the 24 V Up.
The EJ5021 EtherCAT plug-in module has an amplitude and frequency error detection of the input signals.
The analog input signal is processed, interpolated and made available as a 32-bit counter value. The counter value consists of the number of whole periods, max. 24 bits, and the value within one sine period, with max. 13-bit resolution. Additionally the EJ5021 EtherCAT plug-in module provides an internal frequency measurement.
It supports via the high precision EtherCAT distributed clocks (DC), the synchronous reading of the encoder value together with other input data in the EtherCAT system. The use of encoder profiles allows an easy and fast linking of the process data to the Motion Control application.