ABB ACH550-01 User Manual page 331

Code Description
8125 DEC IN AUX START
Sets the PFA deceleration time for a maximum-to-zero frequency ramp.
This PFA deceleration ramp:
• applies to the speed regulated motor when an auxiliary motor is
switched on.
• replaces the deceleration ramp defined in
• applies only until the output of the regulated motor decreases by an
amount equal to the output of the auxiliary motor. Then the
deceleration ramp defined in
0 = .
NOT SEL
0.1...1800 – Activates this function using the value entered as the
deceleration time.
8126 TIMED AUTOCHANGE
Sets the autochange with timer. When enables, autochange is
controlled with the timed functions.
0 = .
NOT SEL
1 = 1 – Enables autochange when timer 1 is active.
TIMER
2...4 =
TIMER
8127 MOTORS
Sets the actual number of PFA controlled motors (maximum 7 motors,
1 speed regulated, 3 connected direct-on-line and 3 spare motors).
• This value includes also the speed regulated motor.
• This value must be compatible with the number of relays allocated to
PFA if the Autochange function is used.
• If Autochange function is not used, the speed regulated motor does
not need to have a relay output allocated to PFA but it needs to be
included in this value.
8128 AUX START ORDER
Sets the start order of the auxiliary motors.
1 =
EVEN RUNTIME
motors. The start order depends on the run time: The auxiliary motor
whose cumulative run time is shortest is started first, then the motor
whose cumulative run time is the second shortest etc. When the
demand drops, the first motor to be stopped is the one whose
cumulative run time is longest.
2 =
RELAY ORDER
326
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Group 22: ACCEL/DECEL
2...4 – Enables autochange when timer 2...4 is active.
. Evens out the cumulative run time of the auxiliary
– The start order is fixed to be the order of the relays.
ACH550-01 User's Manual
Range
0.0...1800 s
Group 22:
0...4
1...7
1=EVEN RUNTIME
2=RELAY ORDER
Parameter listing and descriptions
ACCEL/DECEL.
applies.