B.3 Parameter TableYASKAWA ELECTRIC SIEP C710616 27C YASKAWA AC Drive A1000 Technical Manual 439Parameter ListB◆ n: Special AdjustmentThe n parameters are used to adjust more advanced performance characteristics such as Hunting Prevention, speedfeedback detection, High Slip Braking, and Online Tuning for motor line-to-line resistance.■ n1: Hunting PreventionL8-18(4BEH) Software Current Limit Selection0: Disabled1: EnabledDefault: 0Min: 0Max: 1272L8-19(4BFH)Frequency Reduction Rate duringOverheat Pre-Alarm Specifies the frequency reference reduction gain at overheat pre-alarm when L8-03 = 4.Default: 0.8Min: 0.1Max: 0.9270L8-27(4DDH) Overcurrent Detection GainSets the gain for overcurrent detection as a percentage of the motor rated current. Overcurrent isdetected using the drive’s overcurrent level or the value set to L8-27, whichever is lower.Default: 300.0%Min: 0.0%Max: 300.0%272L8-29(4DFH)Current Unbalance Detection(LF2) 0: Disabled1: EnabledDefault: 1Min: 0Max: 1272L8-35(4ECH) Installation Method Selection 0: IP00 enclosure drive1: Side-by-Side mounting2: NEMA Type 1 enclosure3: Finless model drive or external heatsink installationDefault: <3> <9>Min: 0Max: 3273L8-38(4EFH)Carrier Frequency ReductionSelection 0: Disabled1: Enabled below 6 Hz2: Enabled for the entire speed rangeDefault: <16>Min: 0Max: 2273L8-40(4F1H)Carrier Frequency ReductionOff-Delay Time Sets the time that the drive continues running with reduced carrier frequency after the carrierreduction condition is gone. Setting 0.00 s disables the carrier frequency reduction time.Default: <10>Min: 0.00 sMax: 2.00 s273L8-41(4F2H) High Current Alarm Selection 0: Disabled1: Enabled. An alarm is triggered at output currents above 150% of the drives rated current.Default: 0Min: 0Max: 1273L8-55(45FH)Internal Braking TransistorProtection 0: Disabled. L8-55 should be disabled when using a regen converter or an optional braking unit.1: Protection enabled.Default: 1Min: 0Max: 1274<3> Parameter setting value is not reset to the default value when the drive is initialized.<9> Default setting is determined by the drive model (o2-04) and duty selection (C6-01).<10> Default setting is determined by the control mode (A1-02).<16> Default setting is determined by the control mode (A1-02) and the drive model (o2-04).No. (Addr.) Name Description Setting Pagen1: Hunting Preventionn1-01(580H) Hunting Prevention Selection0: Disabled1: EnabledDefault: 1Min: 0Max: 1275n1-02(581H) Hunting Prevention Gain SettingIf the motor vibrates while lightly loaded, increase the gain by 0.1 until vibration ceases. If themotor stalls, decrease the gain by 0.1 until the stalling ceases.Default: 1.00Min: 0.00Max: 2.50275n1-03(582H) Hunting Prevention Time ConstantSets the time constant used for Hunting Prevention.Default: <6>Min: 0 msMax: 500 ms275No. (Addr.) Name Description Setting PageOLV/PM AOLV/PMCLVV/f w/PGCLV/PMV/f OLV common_TMonlyAll Modes common_TMonlyOLV/PM AOLV/PMCLVV/f w/PGCLV/PMV/f OLV common_TMonlyOLV/PM AOLV/PMCLVV/f w/PGCLV/PMV/f OLV common_TMonlyAll Modes common_TMonlyOLV/PM AOLV/PMCLVV/f w/PGCLV/PMV/f OLV common_TMonlyOLV/PM AOLV/PMCLVV/f w/PGCLV/PMV/f OLV common_TMonlyAll Modes common_TMonlyAll Modes common_TMonlyOLV/PM AOLV/PMCLVV/f w/PGCLV/PMV/f OLV common_TMonlyOLV/PM AOLV/PMCLVV/f w/PGCLV/PMV/f OLV common_TMonlyOLV/PM AOLV/PMCLVV/f w/PGCLV/PMV/f OLV common_TMonly
