DEVICE AND METHOD FOR GENERATING A TRIGGER SIGNAL IN A POSITION-MEASURING DEVICE AND CORRESPONDING POSITION-MEASURING DEVICE

摘要

A method generates an asynchronous trigger signal in a position-measuring device having a position-sensing unit, a processing unit and an interface unit. The position-measuring device is connectable via the interface unit and a bidirectional data channel to subsequent electronics for communication purposes. A synchronous data stream is generated from an asynchronous data stream arriving at the position-measuring device from a direction of the subsequent electronics by sampling the asynchronous data stream in a time pattern of a clock signal. A gate signal is generated upon an enable condition for outputting the trigger signal being detected by evaluating the synchronous data stream. The asynchronous trigger signal is generated upon the gate signal being present and a signal edge of the asynchronous data stream occurring.

主权项

1. A method for generating an asynchronous trigger signal in a position-measuring device having a position-sensing unit, a processing unit and an interface unit, the position-measuring device being connectable via the interface unit and a bidirectional data channel to subsequent electronics for communication purposes, the method comprising:
generating a synchronous data stream from an asynchronous data stream arriving at the position-measuring device from a direction of the subsequent electronics by sampling the asynchronous data stream in a time pattern of a clock signal; generating a gate signal upon an enable condition for outputting the trigger signal being detected by evaluating the synchronous data stream; and generating the asynchronous trigger signal upon the gate signal being present and a signal edge of the asynchronous data stream occurring.