ABB ACS880-07 - Implementing a Bypass Connection; Implementing the Functions Provided by the FSO Safety Functions Module; Implementing the Power Loss Ride-Through Function

Implementing the functions provided by the FSO safety
functions module
You can order the drive with an FSO-12 safety functions module (option +Q973) or
FSO-21 safety functions module (option +Q972). An FSO module enables the
implementation of functions such as Safe brake control (SBC), Safe stop 1 (SS1), Safe
stop emergency (SSE), Safely limited speed (SLS) and Safe maximum speed (SMS).
The settings of the FSO module have default values when delivered from the factory.
The wiring of the external safety circuit and configuration of the FSO module are the
responsibility of the user.
The FSO module reserves the standard Safe torque off (STO) connection of the drive
control unit. STO can still be utilized by other safety circuits through the FSO module.
See the appropriate manual for more information.
Note: The UCU control unit does not support options +Q973 and +Q972.
CodeName
3AXD50000015612FSO-12 safety functions module user's manual
3AXD50000015614FSO-21 safety functions module user's manual
Implementing the power loss ride-through function
If the incoming supply voltage is cut off, the drive will continue to operate by utilizing
the kinetic energy of the rotating motor. The drive will be fully operational as long as
the motor rotates and generates energy to the drive.
If the drive is equipped with a main contactor or breaker, it restores the drive input
power after a short break. The contactor re-connects after the break automatically.
If the drive is equipped an external uninterruptible auxiliary power supply (option
+G307), it keeps the main contactor closed in power-loss situations
Note: If the power loss lasts so long that the drive trips on undervoltage, a fault reset
and a fresh start command is required to continue operation.
Implement the power-loss ride-through function as follows:
1. Enable the power-loss ride-through function of the drive (parameter 30.31).
2. Enable the automatic restart of the motor after a short power supply break:
• Set the start mode to automatic (parameter 21.01 or 21.19, depending on the
motor control mode being used).
• Define the automatic restart time (parameter 21.18).
WARNING!
Make sure that a flying restart of the motor will not cause any danger. If you
are in doubt, do not implement the power loss ride-through function.
Implementing a bypass connection
If bypassing is required, employ mechanically or electrically interlocked contactors
between the motor and the drive and between the motor and the power line. Make
sure with interlocking that the contactors cannot be closed simultaneously. The
110 Guidelines for planning the electrical installation