Chapter 6 – Parameters6-16ACH 500 Programming ManualGroup 10.8 ExtCommunicationFor external communication parameter settings, refer to the Remote PanelManual (SAGS700PAN-04) or the DMT 500 PC Manual (DMT500PC-US-04)for information on the GS protocol parameters, or the ACS 500 ModbusManual (ACS500MODBUS-US-04) for information on the Modbus protocolparameters.Main 20Drive ParametersGroup 20.1Freq/Current LimitsThese parameter values can be altered with the ACH 500 running, except thosemarked with (O). The Range/Unit column in Table 6-10 shows parametervalues. The text following the table explains parameter values in detail.Table 6-10 Group 20.11 MINIMUM FREQUENCY Represents the minimum output frequency.2 MAXIMUMFREQUENCYRepresents the maximum output frequency.3 FREQUENCY RANGE To use the ACH 501 for frequencies higher than 120 Hz, you must first changethis parameter.This parameter sets the range for all frequency parameters.0 – 120 HzDefault frequency range. Output frequency display to 0.01 Hz.0 – 500 HzExtended frequency range. Available for ACH 501 only. Output frequencydisplay to 0.1 Hz.CAUTION: Special application considerations must be taken into account forhigh frequency operation.Parameter Range/Unit Description1 MINIMUM FREQUENCY 0 – 500 Hz (ACH 501)0 – 120 Hz (ACH 502)Operating range minimumfrequency.2 MAXIMUM FREQUENCY 0 – 500 Hz (ACH 501)0 – 120 Hz (ACH 502)Operating range maximumfrequency.3 FREQUENCY RANGE (O) 0 – 500 Hz or0 – 120 HzFrequency Range.(ACH 501 only)4 CURRENT LIMIT 0.5 – 2.0 timesACH 500 current (IN)Output current limit.