Yaskawa Sigma-5 User Manual: Design and Maintenance - Rotary Motors - Manual (Page 78)

3 Wiring and Connection
3.7.2 Setting Regenerative Resistor Capacity
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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.
Be sure to set this parameter when installing an external regenerative resistor to the SERVOPACK.
When set to the factory setting of “ 0, ” the SERVOPACK’s built-in resistor has been used.
Set the regenerative resistor capacity within tolerance value. When the set value is improper, alarm A.320 is
detected.
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
resistor capacity (W).
• For forced convection cooling method: Set the value 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 (units: 10 W)
WARNING
• 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.
Pn600
Regenerative Resistor Capacity
Classification
Setting Range Unit Factory Setting When Enabled
0 to SERVOPACK
capacity
10 W 0 Immediately Set up
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.
Speed Position Torque