3 Wiring and Connection
3.7.2 Setting Regenerative Resistor Capacity
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3.7.2
Setting Regenerative Resistor Capacity
When a non-Yaskawa external regenerative resistor is connected, always set Pn600 (Regenerative Resistor
Capacity) to the resistor capacity.
Be sure to set the regenerative resistor capacity (Pn600) to a value that is in accordance with the allowable
capacity of the actual external regenerative resistor being used.
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 regenerative
resistor capacity (W).
• For forced convection cooling: Set the value to a maximum 50% of the actually installed regenerative
resistor capacity (W).
Example: Set 20 W (100 W
×
20%) for the 100-W external regenerative resistor with natural convection
cooling method:
Pn600 = 2 (unit: 10 W)
Note 1. If Pn600 is not set to the optimum value, alarm A.320 will occur.
2. When set to the factory setting (Pn600 = 0), the SERVOPACK’s built-in resistor or Yaskawa’s regenerative resis-
tor unit has been used.
WARNING
• If Pn600 is set to 0 when a non-Yaskawa external regenerative resistor is connected, regenerative over-
load alarms (A.320) may not be detected. If the regenerative overload alarm (A.320) is not detected cor-
rectly, the external regenerative resistor may be damaged and an injury or fire may result.
Pn600
Regenerative Resistor Capacity
Classification
Setting Range
Unit
Factory Setting
When Enabled
0 to SERVOPACK
capacity
10 W
0
Immediately
Setup
• When the external regenerative resistors for power are used at the rated load ratio,
the resistor temperature increases to between 200 and 300
°
C. The resistors must be
used at or below the rated values. Check with the manufacturer for the resistor’s load
characteristics.
• For safety, use the external regenerative resistors with thermoswitches.
Speed
Position
Torque
