ABB ACQ550-U1-011A-6, User Manual

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ACQ550-U1 User’s Manual 167
Parameters
8117 NR OF AUX MOT
Sets the number of auxiliary motors.
• Each auxiliary motor requires a relay output, which the drive uses to send start/stop signals.
• The Autochange function, if used, requires an additional relay output for the speed regulated motor.
• The following describes the set-up of the required relay outputs.
Relay outputs
As noted above, each auxiliary motor requires a relay output, which the drive uses to send start/stop signals. The
following describes how the drive keeps track of motors and relays.
• The ACQ550 provides relay outputs RO1…RO3.
• An external digital output module (OREL-01) can be added to provide relay outputs RO4…RO6.
• Parameters 1401…1403 and 1410…1412 define, respectively, how relays RO1…RO6 are used – the parameter
value 31
PFC
defines the relay as used for PFC.
• The ACQ550 assigns auxiliary motors to relays in ascending order. If the Autochange function is disabled, the first
auxiliary motor is the one connected to the first relay with a parameter setting = 31
PFC
, and so on. If the
Autochange function is used, the assignments rotate. Initially, the speed regulated motor is the one connected to
the first relay with a parameter setting = 31
PFC
, the first auxiliary motor is the one connected to the second relay
with a parameter setting = 31
PFC
, and so on.
• The fourth auxiliary motor uses the same reference step, low frequency and start frequency values as the third
auxiliary motor.
Code Description
ACQ550
Standard PFC mode PFC with Autochange mode
ACQ550
Relay logic