3 Wiring and Connection3.8.3 Setting Regenerative Resistor Capacity3-383.8.3 Setting Regenerative Resistor Capacity(1) Using a Regenerative Resistor Unit Specified by Yaskawa Using a Specified CombinationIf you use a regenerative resistor unit specified by Yaskawa in one of the specified combinations, use the fac-tory setting for Pn600. Using a Non-Specified CombinationIf you use a non-specified combination, refer to (2) Using a Non-Specified Regenerative Resistor Unit.(2) Using a Non-Specified Regenerative Resistor UnitIf you use a non-specified regenerative resistor unit or if you use a regenerative resistor unit specified byYaskawa but do not use it in the specified combination, set the capacity of the resistor in Pn600 (RegenerativeResistor Capacity).Be sure to set the regenerative resistor capacity (Pn600) to a value that is in accordance with the allowablecapacity of the actual regenerative resistor unit being used.Note: If Pn600 is not set to the optimum value, alarm A.320 will occur.The setting will vary with the cooling method of external regenerative resistor:• For natural convection cooling: Set the value to a maximum 20% of the actually installed regenerativeresistor capacity (W).• For forced convection cooling: Set the value to a maximum 50% of the actually installed regenerativeresistor capacity (W).Example: Set 20 W (100 W × 20%) for the 100-W regenerative resistor unit with natural convectioncooling method:Pn600 = 2 (unit: 10 W)WARNING• If you set Pn600 to 0 when a non-specified regenerative resistor unit is connected or when a regenerativeresistor unit specified by Yaskawa is connected in a non-specified combination, regenerative overloadalarms (A.320) may not be detected. If the regenerative overload alarm (A.320) is not detected correctly,the regenerative resistor may be damaged and an injury or fire may result. Always set Pn600 to a suitablevalue.Pn600Regenerative Resistor Capacity ClassificationSetting Range Unit Factory Setting When Enabled0 to SERVOPACKcapacity 10 W 0 Immediately SetupWhen the regenerative resistor unit for power are used at the rated load ratio, the resis-tor temperature increases to between 200°C and 300°C. The resistors must be used ator below the rated values. Check with the manufacturer for the resistor’s load character-istics.Speed Position Torque
