ABB DCS 500B Description

Also see for DCS 500B: Operating instructions Service manual Service manual

Contents

ABB DCS 500B Description Manual pdf 47 page image

Functional Software descriptionDCS 500 Software Description 39The function can be graphed using the 5 points determined by theparameter settings.Within the next figure there are 3 possibilities shown together withthe outlooking of the curve and the parameter setting.... _LIM_N120000Speed1/4 2/4 3/4CURRENT LIMIT2309P8 40002310P9 40952311P10 28002312P11 19002313P12 13502314P13 800... _LIM_N2... _LIM_N3... _LIM_N4... _LIM_N5... _LIM_SPEEDcurve 1P8 4000P9 430P10 600P11 1250P12 2250P13 4500curve 1curve 2curve 2P8 4000P9 1150P10 3800P11 4750P12 3800P13 2000curve 3curve 3Figure 20 Speed dependant current limitation (example)In default condition the parameters _LIM_Nx are set to 4 timesnominal current and _LIM_SPEED is set to 20000 = 100% speed todisable the function. The values of the parameters P2310 to P2314don´t need to be in a specific order (e.g. not constantly increasing /decreasing, see above). Dependend on the function of the arma-ture current over speed range the following steps should be ap-plied:- specify the MAX_CURR_LIM_SPEED (2309)- set the ARM_CURR_LIM_N1 (2310); the converter will use thisvalue for the speed range between zero speed and P2309;please keep in mind, that all other limitations have to be in-creased, if more than nominal motor current is demanded(scale: 4095 = nominal current of motor)- the speed range between the speed specified via P2309 andtop speed (100% or 20000) is splitted into 4 even parts- set the ARM_CURR_LIM_N2 (2311); to a current value,needed at point 1/2- do the same with the other pairsGear BacklashCompensationThe gear backlash compensation function can be used for back-lash-affected drives. When the torque reference is changing direc-tion, the torque limit is reduced for a while. ParameterGEAR.START TORQ (2315) defines the torque limit after thetorque direction change. Scale: 4000 = nominal torque of motor