39
Rev. 1.1
2018/04
400-820-9661
M2DC Series Hardware Manual
4.6 Regeneration Resistor
In M2DC-6D5 or M2DC-10D servo drives, there is a pre-installed 20W regeneration resistor. In some
applications, the pre-installed regeneration resistor might not be enough to absorb all foldback current and
get a over-voltage fault. In these cases, a larger wattage regeneration resistor needs to be connected to
P3 connector port externally, to prevent drive over voltage warnings.
4.6.1 Recommended external resistor
Unit
Range
Resistance R
Ω
5≤R≤10
Power
W
>100
There is no pre-installed regeneration absorbing resistor internally in M2DC-20D drive. Pleas do connect
an external absorbing resistor to P3 port.
4.6.2 Regeneration ResistorConfiguration
The following steps show how to configure the regenerration resistor.
1. Run the M Servo Suite softwar
2. Click the Drive button of the menu and select Misc.Setting
3. Enter the parameters of the regen-resistor
Wattage:
The regeneration resistor wattage. M2DC drives
calculate the continuous wattage induced into an external
regeneration resistor and must know the continuous wattage rating
of the regen resistor to do this effectively.
Resistor:
The regeneration resistor value.M2DC drives
dynamically calculate the continuous wattage induced into an
external regeneration resistor and must know the value of the
regen resistor to do this effectively.
Peak Time:
The regeneration resistor time constant. Calculates
the peak time that the resistor can tolerate full regeneration
voltage. The time is scaled as period count. One period is 250us.