15 Special functions15.1 Changing the Clock frequencyThe factory setting of the frequency converter’s clock frequency depends on the size and the motortype:Size Synchronous motor Asynchronous motorZETADYN 3xx011ZETADYN 3xx013ZETADYN 3xx017ZETADYN 3xx023ZETADYN 3xx032ZETADYN 3xx040ZETADYN 3xx050ZETADYN 3xx062ZETADYN 3xx074Clock frequency 16 kHz auto(Parameter M_PWM=Auto)Clock frequency 16 kHz auto(Parameter M_PWM=Auto)InformationIf necessary the clock frequency can be changed continuously between 2.5 …. 16 kHz in thePower section menu.For release the ESC key must be pressed for approx. 5 s. until ZIEHL-ABEGG-Intern FREIGABEappears in the display.InformationOnly change the clock frequency after consultation with the ZIEHL-ABEGG hotline. Consulta-tion can clarify the effect of changing the clock frequency on the service life of the frequencyinverter.CAUTION!Caution!Increasing the clock frequency causes• a performance reduction of the frequency inverter (see Technical Data chapter)• a greater power loss and thus increased heating of the frequency inverterThe service life of the frequency inverter is negatively influenced by the higher temperatures.15.1.1 Fixed presetting of the clock frequency (Menu Power sectionl/M_PWM=Fix f_PWM)The cycle frequency of the frequency inverter is 8 kHz after setting at the factory. This can bechanged, if necessary, in the Power Unit/f_PWM menu continuously between 2.5 ... 10 kHz.15.1.2 Automatic adjustment if the clock frequency (Menu Power sectionl/M_PWM=Auto)The inverter works with the clock frequency which is configured in the the enuPower section/f_PWM_H.If required the inverter switches to the switching frequency set in the menu "Power section/f_PWM".15.2 Encoder offset-alignmentCAUTION!Caution!Make sure you perform an encoder alignment if you operate a synchronous motor. Operatingthe motor without encoder-offset alignment can cause uncontrolled motor movements.Traveling is prohibited before an absolute encoder offset alignment has been performed!InformationIn ZIEHL-ABEGG motors, the absolute value encoder is already calibrated to the offset value"0" ex works.It is no longer necessary to perform an absolute encoder offset alignment!Original operating instructionsZETADYN 3C Special functionsR-TBA08_03-GB 1619 Part.-No. 00163322-GB155/204
