Alwalton Introduction The purpose of the CEMA Sluice Gate software at Alwalton is to make the most efficient use of the single sluice gate to maintain a desired upstream river level. The Sluice Gate is controlled via a Rockwell CompactLogix PLC with RSLogix 5000 software utilising a Rotork IQ Actuator to drive the Gate. The CEMA Standard Sluice Gate Control Software has been designed to compare a river retention set-point with an upstream

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