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How to calculate Round Trip Time to Beckhoff I/Os

Introduction

My projects deals with very high speed physical inputs. The inputs need to come into Allen-Bradley controller within 20 mili-seconds. Here is the physical set up:

Allen-Bradley CompactLogix 1769-L35E -> Beckhoff CX1100 with real time Ethernet -> Beckhoff PLC Program -> Beckhoff ELxxxx I/Os

Round Trip Time Calculations

Here is how to calculate the […]