ABB ACS320 series, Руководство пользователя

Страница: 263 / 442

Actual signals and parameters 263
8109
START FREQ 1
0.0 … 500.0 Hz 0.1 Hz 60.0
Sets the frequency limit used to start the first auxiliary motor. The first auxiliary motor
starts if:
• No auxiliary motors are run-
ning.
• ACS320 output frequency
exceeds the limit:
8109 START FREQ 1 + 1 Hz.
• Output frequency stays
above a relaxed limit
(8109 START FREQ 1 - 1 Hz)
for at least the time:
8115
AUX MOT START D .
After the first auxiliary motor
starts:
• Output frequency decreases
by the value =
(8109 START FREQ 1) -
(
8112 LOW FREQ 1 ).
• In effect, the output of the speed regulated motor drops to compensate for the input
from the auxiliary motor.
See the figure, where:
A = (8109 START FREQ 1) - (
8112 LOW FREQ 1 )
B = Output frequency increase during the start delay.
C = Diagram showing auxiliary motor’s run status as frequency increases (1 = On).
Note: 8109 START FREQ 1 value must be between:
• 8112 LOW FREQ 1
• ( 2008 MAXIMUM FREQ ) -1.
8110 START FREQ 2 0.0 … 500.0 Hz 0.1 Hz 60.0
Sets the frequency limit used to start the second auxiliary motor.
• See parameter
8109 START FREQ 1 for a complete description of the operation.
The second auxiliary motor starts if:
• One auxiliary motor is running.
• ACS320 output frequency exceeds the limit: 8110 START FREQ 2 + 1.
• Output frequency stays above the relaxed limit (8110 START FREQ 2 - 1 Hz) for at
least the time: 8115 AUX MOT START D .
Group 81: PFA control
Code Description Range Resolution Default S
t
A B
f (Hz)
f
MAX
f
MIN
1
0
t
C
A
8115
8109
8112
( 8109 )+1