Telemecanique Altivar 56 manual - Northern Industrial

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Bulletin No. 50006-519-01BChapter 5 — ConfigurationDecember 1996 7 → General Configuration MenuControlled Stop CommandMethods (continued)Run Forward10Controlled StopLIx ActiveState low10fFrequency OutputFigure 51: Fast Stop Timing Diagram (2-Wire Command)L1Run Enable10Run Forward10Controlled StopLIx ActiveState low10Frequency OutputfFigure 52: Fast Stop Timing Diagram (3-Wire Command)With fast stop, the drive controller decelerates as quickly as possible withoutcausing a nuisance trip. Figure 51 and Figure 52 illustrate timing sequence for FastStop.DC Injection BrakingWARNINGNO HOLDING TORQUE• DC injection braking does not provide holding torque at zero speed.• DC injection braking does not function during loss of power or drive controller fault.• When required, use separate brake function for holding torque.Failure to follow this instruction can result in death, serious injury, or equipmentdamage.CAUTIONMOTOR OVERHEATING AND DAMAGEApplication of DC injection braking for long periods of time can cause motor overheatingand damage. Protect motor from extended periods of DC injection braking.Failure to follow this instruction can result in injury or equipment damage.With DC Injection Braking, DC current is injected in the stator creating a stationarymagnetic pole which brakes the rotor. This method of braking produces maximumtorque at low frequencies.© 1996 Square D All Rights Reserved83ηττπ://νιχοντρολσ.χοm
Chapter 5 — ConfigurationBulletin No. 50006-519-01B7 →General Configuration Menu December 1996Controlled Stop CommandMethods (continued)Two adjustable parameters, DC Injection Level and DC Brake Time, control theoperation of DC Injection Braking. DC Injection Level sets the current level usedfor injection braking. The level is programmable between 50 and 110% of nominaldrive controller current. Factory setting is 70%. Actual braking torque depends onthe motor characteristics. DC Brake Time can be set between 0 and 30 seconds,preset at 2 seconds. If 30.1 seconds is selected, the drive controller brakes for 30seconds at the adjusted level and then continuously at 50% of rated current.1Run Forward0Controlled Stop 1LIx Active 0State HighFrequency outputf0.1 HzDC injectionIdcTdc
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Telemecanique Altivar 56 manual - Northern Industrial

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