ABB RCNA-01 Manuel d'utilisateur télécharger pdf (Page 306)

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101

302 Parameter listing and descriptions

ACH550-01 User's Manual

8111 START FREQ 3 0.0…500 Hz

Sets the frequency limit used to start the third auxiliary motor.

• See 8109

START FREQ 1 for a complete description of the operation.

The third auxiliary motor starts if:

• two auxiliary motors are running.

• ACH550 output frequency exceeds the limit 8111 + 1 Hz.

• output frequency stays above the relaxed limit (8111 - 1 Hz) for at

least the time 8115

AUX MOT START D.

8112 LOW FREQ 1 0.0…500 Hz

Sets the frequency limit used to stop the first auxiliary motor. The first

auxiliary motor stops if:

• the first auxiliary

motor is running

alone.

• ACH550 output

frequency drops

below the limit:

8112 - 1.

• output frequency

stays below the

relaxed limit

(8112 + 1 Hz) for

at least the time:

8116

AUX MOT

STOP D.

After the first

auxiliary motor

stops:

• Output frequency

increases by the value

(8109

START FREQ 1) - (8112 LOW FREQ 1).

• In effect, the output of the speed regulated motor increases to

compensate for the loss of the auxiliary motor.

See figure, where:

• A = (8109

START FREQ 1) - (8112 LOW FREQ 1)

• B = Output frequency decrease during the stop delay.

• C = Diagram showing auxiliary motor’s run status as frequency

decreases (1 = On).

• Grey path = Shows hysteresis – if time is reversed, the path

backwards is not the same. For details on the path for starting, see

the diagram at 8109

START FREQ 1.

Note: 8112

LOW FREQ 1 value must be between:

• (2007 MINIMUM FREQ) +1 and 8109 START FREQ 1

Code Description Range

P 8116

(P 8112)-1

f (Hz)

MAX

MIN

P 8112

P 8109

1 2 ... 301 302 303 304 305 306 307 308 309 310 311 ... 473 474

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ABB RCNA-01 Manuel d'utilisateur Page 306

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