User`s manual

86 • Vacon apfiff09 marine
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6
7.2.3 Power Reference
The Power reference mode allows the motor to operate at constant power while speed and torque
are changing giving steady load for the generators in changing conditions.
This also gives a fast response for thrusters as torque is increased rapidly after increase of power
reference thus making speed of the thrusters to speed up fast to new reference.
Pure speed control where ramp times are tuned slow to limit fast power changes on higher speeds
makes response slow especially when starting from zero speed where thrusters do not create
thrust.
The change between power reference mode and speed controller mode is made by changing motor
control modes between speed and torque control.
Note: Do not change between open loop and closed loop control modes while the drive is run state.
- P2.8.1 Motor Control Mode; Speed control modes
- P2.8.2 Motor Control Mode 2; Torque control modes
- DI Motor Control mode 1/2; Selection between speed and power control mode
- P2.2.9.1 Torqu
In power reference mode the drive is operating in torque control mode. Therefore, the torque
reference selector needs to be set to value 10 (Power reference) where given power reference is
converted to torque reference for the motor control.
MUX
K
IN 0
IN 1
IN 2
IN 3
IN 4
IN 5
IN 6
IN 7
IN 8
IN 9
P Power Ref. Sel
F Analogue Input 1
F Analogue Input 2
F Analogue Input 4
F Analogue Input 3
V
Power Reference
F FieldBusReference
F Keypad Referece
F AI2 Joustck
F AI1 Joystick
V Power Reference
Selection 7 and 8 do not use Max
Scaling
MUL
X
X
P Power Ref. Max
RAMP10
STOP OUT
SET
DATA
SPEED
IN
LT
IN 1
IN 2
P PowerRefInc.Rate
Power_Reference_Final