Telemecanique Altivar 56 manual - Northern Industrial

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Bulletin No. 50006-519-01BChapter 5 — ConfigurationDecember 1996 7 →General Configuration MenuCAUTIONMOTOR OVERHEATINGRepeated reset of the thermal state after a thermal overload can result in thermal stressto the motor.When faults occur, promptly inspect motor and driven equipment for problems (lockedshaft, mechanical overload, etc.) prior to restarting. Also check power supplied to motorfor abnormal conditions (phase loss, phase imbalance, etc.).Failure to follow this instruction can result in damage to the motor.When a thermal overload fault occurs, a screen appears which asks “Do you wantto clear the thermal state?” If NO is selected, the motor overload fault cannot bereset until the thermal state of the motor, as calculated by the motor overloadalgorithm in the drive controller, is less than 100%.If YES is selected, the motor overload fault is restrained. The motor overload faultcan be reset and the drive controller restarted. The restraint of the motor overloadtrip will last for approximately one minute. At the end of one minute, the restraintwill clear and a motor overload trip will occur. This function can be used to allowmaintenance personnel to perform an orderly shut-down of a process in the eventof a motor overload fault. Subsequent restraint is possible, if required. However,repeated use of the restraint function can ultimately lead to motor damage.Input Phase FailureInput Phase Failure is used to detect loss of one or all input phases. When set toYes, if one input phase is lost, the drive controller will trip. If the phase is restoredand the drive controller is in 2-wire command with the Run Enable and directioninputs high, the drive controller will automatically restart the motor, regardless ofthe setting of Automatic Restart. If the phase is restored and the drive controller isin 3-wire command, the drive controller will be reset, but the motor will not start.If more than one phase is lost, the drive will trip on undervoltage.Input phase failure can be inhibited by selecting No when a line contactor is usedwith the drive controller and control power is supplied separately to CL1-CL2, orin special applications when a common DC bus tie is used. When set to No, inputphase loss will be ignored, however undervoltage will be displayed if the DC busvoltage is less than the undervoltage level but sufficient to maintain the drivecontroller power supply. The Fault State relay R1 will remain energized whenevervoltage is present on CL1 and CL2, as long as there are no other faults. Theundervoltage condition must be cleared prior to the drive controller recognizing arun command.Loss of FollowerLOSS FOLLOWERNoGo to:####HzFaultLoss of follower is used with the AI2 input and occurs when the 4-20 mA or 20-4mA reference input is less than 3 mA. The drive controller can be programmed tofault, to run at a preset speed (programmable from Low Speed to High Speed), orto ignore the fault condition (factory preset) when loss of follower is detected.When “Go to ### Hz” is selected, AI2 must be the only assigned speed reference.All other speed references must be de-selected (see “Speed Reference” on page 79).The adjustment range of “Go to ### Hz” is 0.1 to 72 Hz.© 1996 Square D All Rights Reserved107ηττπ://νιχοντρολσ.χοm
0.0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0fnChapter 5 — ConfigurationBulletin No. 50006-519-01B7 →General Configuration Menu December 1996Fold BackPercent of preset current limit100 %fn= nominal frequencyFigure 66: Fold BackFold Back is displayed only if the drive controller is configured for variable torque(page 67). Fold Back tapers the current limit curve as shown in Figure 66. Fold Backcan be activated or deactivated from the keypad display.Fault ResetFAULT RESETNOYES,LOGIC IN: ---,† & ENT to modifyESC to quitEnabling Fault Reset allows the drive controller to be reset when in TerminalCommand mode after tripping on certain faults when an assigned logic input ishigh. To enable Fault Reset, select Yes and assign a logic input. The faults resettablewith this function are: Overvoltage, DC-Bus Overvoltage, Output Phase Loss,Drive Overtemperature, Motor Overload, Loss of Follower, Sequence time-outfault, and Process time-out fault. When in Keypad Command mode (page 65) afunction key can be programmed for Fault Reset.Dynamic Brake FaultOutput Phase FaultDB Fault is available on drive controllers with dynamic braking. Enabling thefunction allows the drive controller to protect the resistor and connection bygenerating a fault if the DB resistor connection is open.Output Phase Fault is used to detect a loss of output phase. The fault can beinhibited by setting to No for troubleshooting or when the motor connected to thedrive controller is less than 45% of drive controller power. Output Phase Fault isautomatically disabled when the Bypass function is used or the drive controller isoperated at less than 33% of nominal frequency.NOTE: Output Phase Fault should be left enabled, except for the reasons stated above. If itmust be disabled (either <strong>manual</strong>ly or by the selection of the Bypass function), always supplyan external motor overload relay. Operation with the presence of an Output Phase Faultcan affect the calibration of the Motor Overload Protection function of the drive controller.108 © 1996 Square D All Rights Reservedηττπ://νιχοντρολσ.χοm
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