You can set acceleration and deceleration ramps for the Auto-cleaning function withparameters P3.21.1.8 and P3.21.1.9.Zero FrequencyOutputFrequencyCleaningForward FrequencyCleaningReverse FrequencyCleaningForwardTimeCleaning ActivationCleaningReverseTimeCleaning FunctionCycle1 Cycle2Cleaning CyclesFig. 91: The Auto-cleaning function10.22.2 JOCKEY PUMPP3.21.2.1 JOCKEY FUNCTION (ID 1674)Use this parameter to control the Jockey pump function.A Jockey pump is a smaller pump that keeps the pressure in the pipeline, when the mainpump is in the sleep mode. This can occur, for example, in the night.The Jockey pump function controls a jockey pump with a digital output signal. You can use ajockey pump if a PID controller is used to control the main pump. The function has 3operation modes.Selectionnumber Selection name Description0 Not used1 PID sleepThe jockey pump starts when the PID Sleep of the mainpump activates. The jockey pump stops when the main pumpwakes up from the sleep mode.2 PID sleep (level)The jockey pump starts when the PID Sleep activates, andthe PID feedback signal is less than the level set by parame-ter P3.21.2.2.The jockey pump stops when the PID feedback signal is morethan the level set in parameter P3.21.2.3 or the main pumpwakes up from the sleep mode.PARAMETER DESCRIPTIONS VACON · 327LOCAL CONTACTS: HTTP://DRIVES.DANFOSS.COM/DANFOSS-DRIVES/LOCAL-CONTACTS/ 10
