ABB ACS 800 Series, Firmware Manual

Page: 203 / 340

Actual signals and parameters
203
60.03 WINDOW SEL ON Activates the Window control function. The Window control, together with
selection ADD at parameter
60.02 , forms a speed supervision function for a
torque-controlled drive. The parameter is visible only when Master/Follower is
active (See Par.
60.01 ). External control location 2 (EXT2) must be active to
enable window control.
NO Inactive 0
YES Window control is active. Selection YES is used only when parameter 60.02
has value ADD. Window control supervises the speed error value (Speed
Reference - Actual Speed). In the normal operating range, window control
keeps the speed controller input at zero. The speed controller is evoked only if:
- the speed error exceeds the value of parameter
60.04 or
- the absolute value of the negative speed error exceeds the value of
parameter
60.05 .
When the speed error moves outside the window, the exceeding part of the
error value is connected to the speed controller. The speed controller produces
a reference term relative to the input and gain of the speed controller
(parameter
23.01 ) which the torque selector adds to the torque reference. The
result is used as the internal torque reference for the drive.
Example: In a load loss condition, the internal torque reference of the drive is
decreased to prevent an excessive rise of the motor speed. If window control
were inactivated, the motor speed would rise until a speed limit of the drive
were reached.
65535
60.04 WINDOW WIDTH
POS Defines the supervision window width above the speed reference. See
parameter
60.03 . The parameter is visible only when Master/Follower is active
(See Par. 60.01 ).
0 … 1500 rpm Positive window width 0… 20000
60.05 WINDOW WIDTH
NEG Defines the supervision window width below the speed reference. See
parameter
60.03 . The parameter is visible only when Master/Follower is active
(See Par. 60.01 ).
0 … 1500 rpm Negative window width 0… 20000
Index Name/Selection Description FbEq