【正文】 at switch off of the direction of rotation and upon reaching 0Hz. The braking time is or until the next dire。 the drive should decelerate from 60 Hz to 10 Hz. delta f = 60 Hz 10 Hz = 50 Hz = (100 Hz / 50 Hz) x 5 s = 10 s Scurve time For some applications it is of advantage when the drive starts and stops jerkfree. This is achieved through a straightening of the acceleration and deceleration ramps. The straightening time, also called Scurve time, can be adjusted with . Adjustment range: Resolution: Factory setting: 0,00 (off)...5,00 s 0,01 s 0,00 s (off) In order to drive defined ramps with activated Scurve time, the acceleration and deceleration times ( and ) must be adjusted higher than the Scurve time (). GB 15 Operation of the Unit Ramp adjustment with Scurves +f [Hz] t1 = Scurve time () t2 = Acceleration time () t3 = Deceleration time () t2 t1 t1 t1 t3 t1 t [s] GB t1 t2 t1 t1 t3 t1 GB f [Hz] Boost In the lower speed range a large part of the motor voltage decreases on the stator resistance. To keep the breakdown torque nearly constant over the entire speed range, the voltage decrease can be pensated with the boost. UA Adjustment range: Resolution: Factory setting: 0,0...25,5 % 0,1 % 2,0 % CP. 15 CP. 16 f Adjustment: ? Determine the rate of utilzation in noload operation with rated frequency ? Preset about 10 Hz and adjust the boost, so that about the same rate of utilization is reached as with the rated frequency. When the motor, during continuous operation, drives with low speed and too high voltage it can lead to an overheating of the motor. Rated frequency With the adjusted frequency the inverter reaches a maximal output voltage. The adjustment of the rated motor frequency is typical in this case. Note: Motors can overheat when the rated frequency is UAincorrectly adjusted! Adjustment range: Resolution: Factory setting: 0...400 Hz 0,0125 Hz 50 Hz 100% CP. 16 f GB 16 Operation of the Unit Special Adjustments The following parameters serve for the optimization of the drive and the adaption to certain applications. These adjustments can be ignored at the initial startup. With this parameter a regulated output voltage in relation to the rated frequency can be adjusted. For that reason voltage variations at the input as well as in the intermediate circuit only have a small influence on the output voltage (U/fcharacteristic). The function allows, among other things, an adaption of the output voltage to special motors. Adjustment range: Resolution: Factory setting: Note: 1...650 V (off) 1V 650 V (off) EnterParameter GB Voltage stabilization In the example below the output voltage is stabilized to 230 V (0% boost). UN/UA 250 V =230 V 190 V UA bei UN = 250V unstabilized UA bei UN = 250V stabilized UA bei UN = 190V stabilized UA bei UN = 190V unstabilized UN = mains voltage UA= output voltage =50 Hz f GB 17 Operation of the Unit Carrier frequency The switching frequency with which the power modules are clocked can be changed depending on the application. The employed power stage determines the maximum switching frequency as well as the factory setting (see manual: part2). Refer to following list to learn about influences and effects of the switching frequency. low switching frequency ? less inverter heating ? less discharge current ? less switching losses ? less radio interferences ? improved concentricity with low speed high switching frequency ? less noise development ? improved sinewave simulation ? less motor losses GB GB Adjustment range (dep. on power circuit): 2/4/8/12/16 kHz Factory setting:depending on power circuit Note:EnterParameter At switching frequencies above 4 kHz pay absolute attention to the max. motor line length in the technical data of the power circuit manual (Part 2). Step frequency 1...3 Input I1 Three fixed frequencies can be adjusted. The fixed frequencies are selected with the inputs I1 and I2. Adjustment range: Resolution: Factory : Factory : Factory : 400...400 Hz 0,0125 Hz 5 Hz 50 Hz 70 Hz Input I2 Input I1 and I2 If adjustments are made that are outside the fixed limits of and , then the frequency is internally limited. The negative values are released in application mode. The rotation source of the fixed frequencies is not changed by , it always corresponds to = 2. GB 18 Operation of the Unit DCbraking / Mode With DCbraking the motor is not decelerated by the ramp. Quick braking is caused by . voltage, which is applied onto the motor winding. This parameter determines how the dcbraking is triggered. Value 0 1 Activation DCbraking。 the drive should accelerate from 10 Hz to 60 Hz. delta f = 60 Hz 10 Hz = 50 Hz = (100 Hz / 50 Hz) x 5 s = 10 s GB Deceleration time The parameter determines the time needed to decelerate from 100 Hz to 0 Hz. The actual deceleration time is proportional to the frequency change. 100 Hz –––––– x actual deceleration time = delta f Adjustment range: Resolution: Factory setting: 1。 0,00…300,00 s 0,00 (off)…5,00 s 0,0…25,5 % 0…400 Hz 1…650 V (off) 2/4/8/12/16 kHz 2) 400...400 Hz 400...400 Hz 400...400 Hz 0…9 0,00…100,00 s 0…200 % 0…200 % (off) 0…15 0,00…300,00 s 0…7 0…20 20,00…20,00 0…68 0…68 0,00…177。 – C/C39。10 VDC Ri = 30 k? + Analog Output X2A 1578 22 PE 10...10 VDC 5 mA Relay Outputs In case of inductive load on the relay output a protective wiring must be provided (. freewheeling diode)! X2A 24 25 26 27 28 29 PE + GB 8 Operation of the Unit 2. Operation of the Unit As an accessory to the local or external (option: cable ) programming an operator is necessary. To prevent malfunctions, the inverter must be brought into nOP status before connecting / disconnecting the operato