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3.4 Connecting Regenerative Resistors
3-41
3
Wiring and Connection
3.4.2
Setting the 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
.
Set the regenerative resistor capacity within tolerance
value. The set value differs depending on the cooling method of external
regenerative resistor:
• For natural air cooling method: Set the value maximum 20% of the actually
installed regenerative resistor capacity (W).
• For forced air cooling method: Set the value maximum 50% of the actually
installed regenerative resistor capacity (W).
(Example)100 W external regenerative resistor with natural cooling method
100 W
20% = 20 W, therefore, Pn600 = 2 (units: 10 W)
Note: 1.
When the set value is improper, the generative overload alarm (A.320) is detected.
2.
The factory setting of “0” is the value when the SERVOPACK’s built-in regenerative
resistor is used.
WARNING
• If 0 is set to the parameter Pn600 while an external regenerative resistor is con-
nected, the generative overload alarm (A.320) may not be detected. If the gen-
erative overload alarm (A.320) is not detected correctly, the external
regenerative resistor may be damaged and an injury or fire may result. Be sure
to set the parameter Pn600 to the capacity of the connected external regenera-
tive resistor.
Pn600
Regenerative Resistor Capacity
Setting Range
Unit
Factory
Setting
When Enabled
Classification
0 to SERVOPACK
capacity
10 W
0
Immediately
Setup
Speed
Position
Force
• 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 charac-
teristics.
• For safety, use the external resistors with thermoswitches.
