P9 ASD Installation and Operation Manual 135
Regenerative Power Ridethrough Mode
Program Protection Under-Voltage/Ridethrough
This parameter determines the motor control response of the ASD in the event
of a momentary power outage or under-voltage condition.
During a Ridethrough, regenerative energy is used to maintain the control
circuitry settings for the duration of the Ridethrough; it is not used to drive the
motor. The motor(s) of the system is/are stopped and then restarted
automatically if so configured.
In a multiple-motor application, there will be a requirement to synchronize the
stopping and restarting of the motors as not to cause breakage in the product
being processed (e.g., wire spools, bobbin winder for textile machines, etc.).
F317 and F318 must be set up to synchronize motor operation as to avoid
breakage in these types of applications.
Note: If used to restart the motors, the Retry setup of F301 is required.
Note: The Jog function will not operate while in the Synchronized
Decel/Accel mode.
Settings:
0 — Off
1 — Ridethrough On
2 — Decel Stop
3 — Synchronized ACC/DEC (TB)
4 — Synchronized ACC/DEC (TB + Power Off)
Ridethrough Setup Requirements
1. Select the Ridethrough Mode at F302.
2. Select the Ridethrough Time at F310.
3. Select the Synchronized Stop/Start Times at F317/F318 (if required).
Note: F317 and F318 are not functional while operating in the Torque
or Position control modes, or for the Jog Run function (F260).
4. Set a discrete input terminal to Power Failure Synchronized Signal and
activate the terminal to enable the Synchronized Accel/Decel function.
5. Select the Ridethrough Control Level at F629.
Direct Access Number — F302
Parameter Type — Selection List
Factory Default — Off
Changeable During Run — Yes
F302 F302
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