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5.6.1 External Regenerative Resistors
EXAMPLE
A
"
IMPORTANT
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* 1. The average regenerative power that can be handled is 20% of the rated capacity of the regen-
erative resistor built into the Servopack.
* 2. The values in parentheses are for the optional JUSP-RA04 Regenerative Resistor Unit.
* 3. The values in parentheses are for the optional JUSP-RA05 Regenerative Resistor Unit.
* 4. The values in parentheses are for the optional JUSP-RA18 Regenerative Resistor Unit.
* 5. The values in parentheses are for the optional JUSP-RA19 Regenerative Resistor Unit.
When installing an external regenerative resistor, make sure that the resistance is the same as that of
the Servopack's built-in resistor. If combining multiple small-capacity regenerative resistors to in-
crease the regenerative resistor capacity (W), select resistors so that the resistance value including
error is at least as high as the minimum allowable resistance shown in the above table.
When installing an external regenerative resistor, a user constant setting must be changed as
shown below.
Pn600
Regenerative Resistor
Capacity
The factory setting of "0" in the above table is the set value used when the Servopack's built-in
resistor is used or when a Servopack without a built-in resistor is used.
When installing an external regenerative resistor, set the regenerative resistor's capacity (W).
When the external regenerative resistor's actual consumable capacity is 100 W, set the user
constant to "10."
1.
In general, when 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. Use resistors at no more than 20% of the rated load ratio
with natural convection cooling, and no more than 50% of the rated load ratio with forced air cooling.
2. For safety's sake, it is recommended that resistors with thermoswitches be used.
Unit:
Setting
Range:
10 W
0 to
Servopack
capacity
5 -81
5.6 Selecting a Regenerative Resistor
Factory
Speed/Torque
Setting:
Control,
Position Control
0
5
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