IAI America XSEL-QX - Manual (Page 448)

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Appendix
 Number of Regenerative Units to be Connected
Regenerative energy produced when a linear movement axis decelerates to a stop or moves downward in
a vertical installation is absorbed by means of the capacitor and resistor in the controller. If the produced
regenerative energy is not fully absorbed internally, an overvoltage error will occur and the controller
cannot operate any more. The specific error that will generate in this condition is “Error No. 60C, Power-
system overheat error.”
Should this error occur, the following measures must be taken:
x Connect an external regenerative unit or units. (Refer to the table below “Guide for Determining
Number of Regenerative Units to be Connected”).
x Increase the cycle time.
x Decrease the speed.
x Shorten the travel distance (in a vertical installation).
x Reduce the load capacity.
x Do not perform synchronous operation (when multiple axes are connected).
An axis produces regenerative energy when it decelerates to a stop in a horizontal installation, or
mainly when it moves downward in a vertical installation. When two or more axes are connected,
therefore, regenerative energy can be reduced by making sure the axes are operated in a manner
not performing the above operations at the same time.
Guide for Determining Number of Regenerative Units to be Connected
SCARA axes (high-speed models)
Type Number of external regenerative unit(s)
IX-NNN2515H/3515H, IX-NNW2515H/3515H,
TNN (UNN) 3015H/3515H, IX-NNC2515H/3515H
1
IX-NNN50 H/60 H, IX-NNW50 H/60 H,
IX-HNN (INN) 50 H/60 H, IX-NNC50 H/60 H
3
IX-NNN70 H/80 H, IX-NNW70 H/80 H,
IX-HNN (INN) 70 H/80 H, IX-NNC70 H/80 H
4
IX-NSN5016/6016 3
SCARA axes (conventional models)
Type Number of external regenerative unit(s)
IX-NNN1205/1505/1805, IX-NNC1205/1505/1805 0
IX-NNN2515/3515, IX-NNW2515/3515, TNN (UNN) 3015/3515,
IX-NNC2515/3515
0
IX-NNN50 /60 , IX-NNW50 /60 ,
IX-HNN (INN) 50 /60 , IX-NNC50 /60
1
IX-NNN70 /80 , IX-NNW70 /80 ,
IX-HNN (INN) 70 /80 , IX-NNC70 /80
1
IX-NSN5016/6016 1
Single axes, orthogonal axes
Vertical installation
(total motor wattage)
Horizontal installation
(total motor wattage)
Number of external regenerative unit(s)
~ 100 W ~ 200 W 0
~ 800 W ~ 1000 W 1
~ 1200 W ~ 1500 W 2
~ 1500 W --- 3
* Conditions for the above guide table
Actuator series: ISA (400 W or below) or ISP (600/750 W)
Stroke: Maximum stroke at which the maximum speed can be output (600 to 800 mm depending on the wattage)
Speed: Rated speed, Acceleration: 0.3 G, Load capacity: Rated load capacity
Operating condition: Synchronous reciprocating operation at a duty of 50%
* The maximum number of external regenerative resistors that can be connected is eight.
* In certain conditions such as when the operating duty is high or acceleration/deceleration is high, more
regenerative resistors may be needed than the applicable number specified in the table above.