5.3 C: TuningYASKAWA ELECTRIC SIEP C710616 27C YASKAWA AC Drive A1000 Technical Manual 177Parameter Details5■ C5-37, C5-38: Motor 2 Inertia, Motor 2 Load Inertia RatioThese parameters function for motor 2 in the same way that C5-17 and C5-18 function for motor 1.These parameters are set automatically when Inertia Tuning and ASR Tuning are performed for motor 2 in CLV andCLV/PM control modes. Refer to Auto-Tuning on page 109 for details on Auto-Tuning or enter the data manually.◆ C6: Carrier Frequency■ C6-01: Drive Duty Mode SelectionThe drive has two different “duty modes” to select from based on the load characteristics. The drive rated current,overload capacity, and maximum output frequency will change depending upon the duty mode selection. Use parameterC6-01 to select Heavy Duty (HD) or Normal Duty (ND) for the application. The default setting is ND. Refer to HeavyDuty and Normal Duty Ratings on page 388 for details about the rated current.Table 5.15 Differences between Heavy and Normal DutyNote: By changing the Duty Mode selection, the maximum size motor the drive can run changes, and the E2- parameters areautomatically set to appropriate values (E4- for motor 2). Parameters settings determined by motor capacity are recalculatedautomatically when the Duty Mode selection is changed. This includes b8-04, L2-03, n5-02, L3-24, C5-17, and C5-37.■ C6-02: Carrier Frequency SelectionParameter C6-02 sets the switching frequency of the drive’s output transistors. Changes to the switching frequency helpslower audible noise and also reduces leakage current.Note: Increasing the carrier frequency above the default value automatically lowers the drive’s current rating. Refer to Rated CurrentDepending on Carrier Frequency on page 179.Note: The default setting for the carrier frequency differs based on the type of motor and the Duty Mode selection. The default is 2 kHzwhen the drive is set for Heavy Duty performance, and defaulted to “Swing PWM1” when set for Normal Duty performance.When using a PM motor, the default carrier frequency is 5.0 Hz.No. Parameter Name Setting Range DefaultC5-37 Motor 2 Inertia 0.0001 to 600.00 kgm 2 Determined by C6-01 and o2-04C5-38 Motor 2 Load Inertia Ratio 0.0 to 6000.0 1.0No. Parameter Name Setting Range DefaultC6-01 Duty Mode Selection 0 or 1 0 (HD)Characteristics Heavy Duty Rating (HD) Normal Duty Rating (ND)C6-01 0 1PerformanceApplicationUse Heavy Duty Rating for applications requiring a high overloadtolerance with constant load torque. Such applications include extrudersand conveyors.Use Normal Duty Rating for applications in which the torque requirementsdrop along with the speed. Examples include fans and pumps where a highoverload tolerance is not required.Over load capability (oL2) 150% of drive rated Heavy Duty current for 60 s 120% of drive rated Normal Duty current for 60 sStall Prevention duringAcceleration (L3-02) 150% 120%Stall Prevention during Run (L3-06) 150% 120%Default Carrier Frequency 2 kHz 2 kHz Swing PWMNo. Parameter Name Setting Range DefaultC6-02 Carrier Frequency Selection 1 to F Determined by A1-02, o2-04.Reset when C6-01 is changed.100%100%0 Motor SpeedRated LoadOverload150%Motor Speed0100%100%120%Rated LoadOverload
