Setting The Regenerative Resistor Capacity - YASKAWA SGD7S-1R9D Product Manual

5.17

Setting the Regenerative Resistor Capacity

The Regenerative Resistor consumes regenerative energy that is generated by the Servomotor,
e.g., when the Servomotor decelerates.
If an External Regenerative Resistor is connected, you must set Pn600 (Regenerative Resistor
Capacity) and Pn603 (Regenerative Resistor Resistance).
 If you connect an External Regenerative Resistor, set Pn600 and Pn603 to suitable values.
If a suitable value is not set, A.320 alarms (Regenerative Overload) will not be detected cor-
rectly, and the External Regenerative Resistor may be damaged or personal injury or fire may
result.
 When you select an External Regenerative Resistor, make sure that it has a suitable capac-
ity.
There is a risk of personal injury or fire.
Regenerative Resistor Capacity
Pn600
Setting Range
(2600
0 to SERVOPACK's
hex)
maximum applica-
ble motor capacity
Regenerative Resistor Resistance
Pn603
(2603 Setting Range
hex)
0 to 65,535
Set the Regenerative Resistor capacity to a value that is consistent with the allowable capacity
of the External Regenerative Resistor. The setting depends on the cooling conditions of the
External Regenerative Resistor.
• For self-cooling (natural convection cooling): Set the parameter to a maximum 20% of the
capacity (W) of the actually installed Regenerative Resistor.
• For forced-air cooling: Set the parameter to a maximum 50% of the capacity (W) of the actu-
ally installed Regenerative Resistor.
For a self-cooling 100-W External Regenerative Resistor, set Pn600 to 2 (×10 W) (100 W ×
Example
20% = 20 W).
Note: 1. An A.320 alarm will be displayed if the setting is not suitable.
2. The default setting of 0 specifies that the SERVOPACK's built-in regenerative resistor or Yaskawa's Regen-
erative Resistor Unit is being used.
1. When an External Regenerative Resistor is used at the normal rated load ratio, the resistor
temperature increases to between 200°C and 300°C. Always apply derating. Consult the
manufacturer for the resistor's load characteristics.
Important
2. For safety, use an External Regenerative Resistor with a thermoswitch.

5.17 Setting the Regenerative Resistor Capacity

WARNING
Setting Unit Default Setting
10 W 0
Setting Unit Default Setting
Ω
10 m 0
Speed Position Torque
When Enabled Classification
Immediately Setup
Speed Position Torque
When Enabled Classification
Immediately Setup
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