Yaskawa FSP Amplifier - Manual (Page 140)

FSP Amplifier User’s Manual Chapter 5: Parameter Settings and Functions
5-73
When installing an external regenerative resistor, make sure that the resistance is
the same as that of the servo amplifier’s built-in resistor. If you combine multiple
small-capacity regenerative resistors to increase the regenerative resistor capacity
(W), select the resistors in a way that the resistance value including error is at
least as high as the minimum allowable resistance shown in the table above. See
Appendix E for additional external regenerative resistor specifications.
5.6.1. External Regenerative Resistor
When installing an external regenerative resistor, a parameter setting must
be changed as shown below.
Parameter Signal Setting (10 W) Control Mode
Pn600
Regenerative
Resistor Capacity Range: 0 to 65535
Default Setting: 0
Speed, Torque,
Position Control, and
Programming
The default setting of “0” in the above table is the set value when the servo
amplifier’s built-in resistor is used or when a servo amplifier without a
built-in resistor is used.
When installing an external regenerative resistor, set the regenerative
resistor’s capacity (W).
Example: When the external regenerative resistor’s actual consumable capacity is 100 W, set the parameter to “10” (10
x 10 W = 100 W)
Note: 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. Parameter Pn600 must be set for the derated resistor.
2.
Use of resistors with thermal switches is recommended as a safety precaution.
„ Connecting Regenerative Resistors
The method for connecting regenerative resistors is as follows.
Disconnect the wire between the servo amplifier’s B2 and B3 terminals and
connect an external regenerative resistor between the B1 and B2 terminals.
Regenerative resistor
B1
B2
FSP Amplifier
*The user must provide the regenerative
i
B3
Be sure to take out the lead wire
between theB2 and B3 terminals.