1301 SPEED CONTROLLER F1 POINT 6 (2.6.23.25)
The speed level in Hz above which the speed controller gain is equal to parameter ID613.
From the speed defined by parameter ID1300 to speed defined by parameter ID1301, the
speed controller gain changes linearly from parameters ID1299 to ID613 and vice versa.
1304 WINDOW POSITIVE 6 (2.10.12)
Defines the size of window to positive direction from the final speed reference.
1305 WINDOW NEGATIVE 6 (2.10.11)
Defines the size of window to negative direction from the final speed reference.
1306 WINDOW POSITIVE OFF LIMIT 6 (2.10.14)
Defines speed controller positive off limit when the speed controller brings speed back to
window.
1307 WINDOW NEGATIVE OFF LIMIT 6 (2.10.13)
Defines speed controller negative off limit when the speed controller brings speed back to
window.
1311 SPEED ERROR FILTER TC 6 (2.6.23.33)
Filter time constant for speed reference and actual speed error. Can be used to remove
small disturbances in the encoder signal.
1382 SPEED CONTROL OUTPUT LIMIT 6 (2.10.15)
The maximum torque limit for the speed controller output as a percentage of the motor
nominal torque.
8.11
AUTOMATIC CHANGING BETWEEN DRIVES (APPLICATION 7 ONLY)
The Autochange function allows the starting and stopping order of drives controlled by the
pump and fan automatics to be changed at desired intervals. The drive controlled by AC drive
can also be included in the automatic changing and locking sequence (P2.9.25). The
Autochange function makes it possible to equalize the run times of the motors and to prevent
e.g. pump stalls due to too long running breaks.
•
Apply the Autochange function with parameter 2.9.24, Autochange.
•
The autochange takes place when the time set with parameter 2.9.26, Autochange
interval, has expired and the capacity used is below the level defined with parameter
2.9.28, Autochange frequency limit.
•
The running drives are stopped and re-started according to the new order.
•
External contactors controlled through the relay outputs of the AC drive connect the
drives to the AC drive or to the mains. If the motor controlled by the AC drive is included
in the autochange sequence, it is always controlled through the relay output activated
first. The other relays activated later control the auxiliary drives (see Fig. 98 Example of 2-
pump autochange, main diagram and Fig. 99 Example of 3-pump autochange, main diagram).
VACON · 378
PARAMETER DESCRIPTIONS
8
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