11.9 L: Protection Function854 YASKAWA ELECTRIC SIEP C710617 01B YASKAWA AC Drive GA700 Technical ManualSets the speed detection width or motor speed detection width when H2-01 to H2-04 = 13, 14, 15, 16 [MFDOFunction Select = Speed Agree 2, User-set Speed Agree 2, Frequency Detection 3, Frequency Detection 4].■ L4-05: FreqReference Loss Detect SelectNo.(Hex.) Name Description Default(Range)L4-05(049D)FreqReference LossDetect Select Selects the operation when a loss of the frequency reference is detected.0(0, 1)Enables the detection of a loss of an analog frequency reference when the frequency reference is input from theMFAI terminals (A1, A2, and A3). Set H2-01 to H2-04 = C [MFDO Function Select = Frequency ReferenceLoss] to enable this function.Frequency reference loss is detected when the frequency reference drops below 10% within 400 ms.Figure 11.133 Detection of Frequency Reference Loss0 : StopThe drive follows the frequency reference and stops the motor.1 : Run@L4-06PrevRefThe drive will continue operation at the frequency reference value set to L4-06 [FreqReference at ReferenceLoss]. When the external frequency reference value is restored, the operation is continued with the frequencyreference.■ L4-06: FreqReference at Reference LossNo.(Hex.) Name Description Default(Range)L4-06(04C2)FreqReference atReference Loss Sets the frequency reference as a percentage that is applicable when notstopping the drive so that it continues to operate after a loss of the frequencyreference value is detected. The value is set as a percentage of the frequencyreference before the loss was detected.80.0%(0.0 - 100.0%)This parameter is enabled when L4-05 = 1 [FreqReference Loss Detect Select = Run@L4-06PrevRef].■ L4-07: Speed Agree Detection SelectionNo.(Hex.) Name Description Default(Range)L4-07(0470)Speed AgreeDetection Selection Selects the condition for activating speed detection.0(0, 1)0 : No detection during baseblockDetects the frequency while the drive is operating. The frequency is not detected when the drive shuts off itsoutput.1 : Detection always enabled◆ L5: Auto RestartThe Auto Restart function attempts to keep machines from stopping when a transient fault is detected.The drive can perform a self-diagnostic check and resume the operation after a fault has occurred. If the cause ofthe fault has disappeared, the drive restarts by first performing Speed Search instead of stopping. A fault history isnot recorded. Use L5-02 [AutoRestartFaultOutputOpeSelect] to select the operation of fault relay signals duringAuto Restart operation.V/f CL-V/f OLV CLV AOLV OLV/PMOLV/PM AOLV/PM CLV/PM EZOLVV/f CL-V/f OLV CLV AOLV OLV/PMOLV/PM AOLV/PM CLV/PM EZOLVV/f CL-V/f OLV CLV AOLV OLV/PMOLV/PM AOLV/PM CLV/PM EZOLV
