ABBDCS Thyristor Power Converters for DC Drive Systems 25 to 5150 A Operating Instructions DCS 600 MultiDrive

armature-circuit current since EMF control is active.

If the unit aborts the auto-tuning routine with the signal 15.02 = -1, the probable

cause of this can be read out of Parameter 6.02 and has to be eliminated as far

as possible (supply, switching sequence etc.).

Afterwards repeat the auto-tuning routine.

If necessary, perform manual balancing.

Switch OFF power!

Read out values of:

41.11 = ......... 41.12 = ......... 43.02 = ......... 43.03 = ............ 43.06 = .........

Use values of 41.11 and 43.06 from the first auto-tuning routine.

Re-activate the field unit used by entering:

a) 15.05 = 1

or

b) 15.05 = 2

and install the supply fuses removed before

2.5 Speed feedback balancing

Activate EMF speed feedback:

50.03 = CALC BY EMF

Select no field weakening mode:

15.06 = FIX

50.01 = Desired speed / or motor rating plate

Scale speed control circuit to maximum speed.

Switch ON power.

DANGER: System components now energized!

Start drive.

Increase reference value in LOCAL mode to 10 % of the maximum speed.

Drive should run up to 10 % of the rated voltage.

Continue with one of the following sections:

• Only when an analog tacho is being used!

• Only when an encoder (pulse encoder) is being used!

• Only when the EMF signal is being used as speed feedback!

Only when an analog tacho is being used!

Connect measuring instrument:

- to X3: 1... 3 or X1: 1... 3

+ to X3: 4 or X1: 4

Check to make sure that the tacho voltage does not exceed the input voltage range

selected with maximum speed.

Turn Potentiometer R2716 [on SDCS-CON-2 board] or R9 [on PS5311 board; if

SDCS-IOB-3 board is used with PS5311] to minimum (left-hand stop).The

measured value must have a positive sign; if necessary interchange tacho cables.

Stop the drive and switch OFF power!

50.03 = ANALOGUE TAC

Analog tacho is used for speed control.

Switch ON power.

DANGER: System components now energized!

Start drive.

Increase reference value in LOCAL mode to 10 % of the maximum speed.

Drive should run up to 10 % of the rated voltage.

Use Potentiometer R2716 [on SDCS-CON-2 board] or R9 [on PS5311 board] to

set the tacho voltage to 10 % of the maximum tacho voltage.

Stop the drive and switch OFF power!

Only when an encoder (pulse encoder) is being used!

3.07 = Content of pulse counter *)

If the shape of the curve corresponds to the diagram below, this means

the wiring is correct and the pulses will be correctly evaluated [see

also documentation entitled “Technical Data”, Chapter I/O boards].

*) This Parameter must be transmitted from the SDCS-CON-2 board to the SDCS-AMC-DC board!

Fig.: Curve shape of the encoder’s pulse counter for sense of rotation "forwards”

Switch OFF power, thus stopping the drive; drive coasts.

50.04 = Number of encoder pulses

As specified on the encoder’s rating plate

50.03 = CON- ENCODER

The encoder connected to the SDCS-CON-2 board is used for speed control.

Switch ON power.

DANGER: System components now energized!

Start drive.

Increase reference value in LOCAL mode to 10 % of the maximum speed

Drive should run at 10 % of the desired speed;

if possible, check with manual tacho.

Stop the drive and switch OFF power!

Only when the EMF signal is being used as speed feedback!

Drive should run at 10 % of the desired speed;

if possible, check with manual tacho.

Stop the drive and switch OFF power

Balancing the field supply unit and the EMF controller

When matching the field supply unit to the system conditions, differences in the procedures must be taken into account; these different procedures result from the operating

mode used. Only the work of that section has to be performed which deals with

the operating mode actually used in your system!

Constant field current control ⇒ Section 2.6.1

Field weakening control with setting range smaller than 1 : 1.5 ⇒ Section 2.6.2

Field weakening control with setting range larger than 1 : 1.5 ⇒ Section 2.6.3

2.6.2 Field weakening control with setting range < 1 : 1.5

CAUTION: Not permitted when Chapter 2.5 was quit with EMF control!

15.06 = EMF CON

Field weakening function activated

99.05 = Speed at field weakening point according to motor rating plate

41.19 = ? reference armature voltage scaled to Supply voltage

Switch ON power.

DANGER: System components now energized!

Start drive.

Measure motor voltage with the ARM_VOLT_ACT signal, Parameter 1.14 *).

Increase speed reference value in LOCAL mode slowly while observing the

motor voltage.

The motor voltage must not exceed the recommended motor voltage; see General

notes at the beginning of this chapter.

Check that field is being weakened.

Do not exceed the maximum motor speed permitted. When an analog tacho is being

used, the display at the CDP 312 panel is not yet necessarily correct.

The motor voltage must not exceed the recommended motor voltage; see General

notes at the beginning of this chapter.

If the field is not being properly weakened, or not being weakened at all, perform the

work of section "Field weakening control with setting range larger than 1 : 1.5” !

*) This Parameter must be transmitted from the SDCS-CON-2 board to the SDCS-AMC-DC board!

Measure speed with manual tacho;

check rated speed when an analog tacho is being used;

if necessary, correct with Potentiometer R2716 [on SDCS-CON-2 board] or