Siemens 6RA70 specifications Field data, Selection of basic technological functions

6Field data

6.1Field control

P082 = 0: Internal field is not used and field functions are not used. (e.g. with permanent-field motors)

P082 = 1: The field is switched together with the line contactor

(field pulses are enabled/disabled when line contactor closes/opens)

P082 = 2: Automatic connection of standstill field set by P257 after a delay parameterized by P258, after operating status o7 or higher has been reached

P082 = 3: Field current permanently connected

6.2Field weakening

P081 = 0: No field weakening as a function of speed or EMF

P081 = 1: Field weakening operation as a function of internal EMF control so that, in the field weakening range, i.e. at speeds above motor base speed, the motor EMF is maintained constant. Note: Rated EMF = Rated Terminal voltage – IratedxRarmature

EMFsetpoint (K289) = P101 – P100 * P110.

7Selection of basic technological functions

7.1Current limits

P171 Motor current limit in torque direction I (in % of P100, default value = 100%)

US setting P171 = 150%

P172 Motor current limit in torque direction II (in % of P100, default value = -100%)

US setting P172 = -150%

7.2Ramp-function generator

P303 Acceleration time 1 (in seconds, default value = 10)

P304 Deceleration time 1 (in seconds, default value = 10)

P305 Initial rounding 1 (in seconds, default value = 0)

P306 Final rounding 1 (in seconds, default value = 0)

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