DCS 500 Field weakening control with setting range 1, If the field time constant is not known

Chapter 2 - Start-Up Instructions

2.6.3Field weakening control with setting range > 1 : 1.5

CAUTION: Not permitted when Chapter 2.5 was quit with e.m.f. control!

Only when unit is fitted with an SDCS-CON-1 control board!

If the field time constant is known, e.g. from the motor data sheet!

1308 = leave as it is; if appropriate vary between 1...5. P-gain of the field current controller

1309 = Enter value of field time constant, if necessary increase by factor 1...2. I-gain of the field current controller

If possible, check controller behaviour with oscilloscope or CMT tool

11202 = SAVE MOT1 SET

Save the altered values in the non-volatile memory!

If the field time constant is not known!

1201 = 7 Panel display: FEXC2/3 MAN. TUNIN Drive Mode: manual balancing of the field current controller

1204 = 4095

1205 = 1000

Ref. value jumps of field current between 25 % and 100 % with POT1 and POT2

11209 = 3

Change between POT1 and POT2 activated

12516 = 0

Switch ON power.

DANGER: System components now energized!

1308 = Match P-gain to field circuit.

1309 = Match I-gain to field circuit.

Oscillograph field current feedback via D/A output, or if one is to hand, use CMT tool to depict it via the TRENDING menu and Parameter 11302.

B

CD E F

A

t

Fig.: Transient response of controller

A:reference value jump

B:undercompensated; reset time and P-gain too small

C:undercompensated; P-gain too small

D:normal

E:slightly overcompensated; when a higher dynamic response is required

F:overcompensated; short reset time and a high P-gain

IV A 2 - 16 DCS 500B / DCP 500B Operating Instructions

3ADW000055R0401_DCS500B_Operating Instruction_e_d