Setting Regenerative Resistor Capacity - YASKAWA Σ-V Series User Manual

3.7.2 Setting Regenerative Resistor Capacity

When an external regenerative resistor is connected, make sure to set the regenerative resistor capacity using
the parameter Pn600.
• If parameter Pn600 is set to 0 while an external regenerative resistor is connected, the generative over-
load alarm (A.320) may not be detected. If the generative overload alarm (A.320) is not detected correctly,
the external regenerative resistor may be damaged and an injury or fire may result.
Regenerative Resistor Capacity
Setting Range
Pn600
0 to SERVOPACK
Be sure to set this parameter when installing an external regenerative resistor to the SERVOPACK.
Set the regenerative resistor capacity within tolerance value.
The set value differs depending on the cooling method of external regenerative resistor:
• For natural convection cooling method: Set the value maximum 20 % of the actually installed regenerative
• For forced convection cooling method: Set the value maximum 50 % of the actually installed regenerative
Example: Set 20 W (100 W × 20 % ) for the 100 W external regenerative resistor with natural convection
cooling method:
Pn600 = 2 (units: 10 W)
Note 1. When the set value is improper, alarm A.320 is detected.
2. When set to the factory setting of "0," the SERVOPACK's built-in regenerative resistor is used.
Unit
10 W
capacity
resistor capacity (W).
resistor capacity (W).
1. When the external regenerative resistors for power are used at the rated load ratio,
the resistor temperature increases to between 200 °C and 300 °C. The resistors must
be used at or below the rated values. Check with the manufacturer for the resistor's
load characteristics.
2. For safety, use the external resistors with thermoswitches.
3.7 Regenerative Resistors Connections
WARNING
Speed Position
Factory Setting When Enabled
0 Immediately
Force
Classification
Set up
3
3-35