Telemecanique Altivar 56 manual - Northern Industrial

Bulletin No. 50006-519-01BChapter 5 — ConfigurationDecember 1996 7 →General Configuration MenuTable 37: Fault Stop and Restart MethodsResettable OnlyBy Manual Reset(Removal Of Power)Fault Reset by LI,Function Key, orManual ResetCan be AutomaticallyResetNon-LatchingFaults [1]Fault CausingFreewheel StopShort circuitGround faultPrecharge failureInternal faultMemory failureDynamic brake faultDynamic brake resistor faultAuto-test failureTransistor short circuitOpen transistorLink FaultAC line overvoltageDC bus overvoltageSequence time-out faultOverspeedOutput phase lossDrive overtemperatureMotor overloadLoss of followerProcess time-out faultSerial link faultAC line overvoltageDC bus overvoltageSequence time-out faultOverspeedOutput phase lossDrive overtemperatureMotor overloadLoss of followerProcess time-out faultUndervoltageinput phasefailure[1] When the fault condition is no longer present, the drive controller will automatically restart the motor if theCommand Type is set for 2-wire and the Run Enable and direction inputs are maintained, regardless of the settingof Automatic Restart.The following sections describe the faults programmable from the 7.4→FaultManagement menu.Power Loss7.4‘FAULT MANAGEMENTFAULT STSTOP TYPEPOWER LO FREEAUTO-RES RAMPCATCH ON†, & ENT to modifyDuring loss of input power, certain actions are taken by the drive controller toenable recovery once power is restored. This is possible since the drive controllerlogic remains active for a least one second after power is lost. The actions takendepend on the settings of Power Loss and Input Phase Failure (see page 107).With Power Loss set to FREE (factory setting), the following sequence occurs whenpower is lost or there is a phase failure while the drive controller is running:• The drive controller freewheel stops (independent of the setting of Input PhaseFailure).• The control logic remains active for at least one second by using the powerstored on the drive controller DC bus.• If input power is restored while the control logic is still active, the drivecontroller automatically restarts independent of the Command type (in the6→Drive Configuration menu) selected. If input power is restored when thecontrol logic is no longer active, the drive controller will follow a normalpower-up sequence. Restart of the drive controller requires a run commandand the absence of faults.With power loss set to RAMP, the following sequence occurs when power is lost orthere is a phase failure while the drive controller is running:• When the DC bus voltage reaches 80% of its initial value, the drive controlleris commanded to decelerate following a ramp. The deceleration attempts torecover inertial energy stored in the load to enable the drive controller tooperate the motor for as long as possible during loss of power.• The control logic remains active for at least one second by using the powerstored on the drive controller DC bus.© 1996 Square D All Rights Reserved101ηττπ://νιχοντρολσ.χοm