ABB ACS850 series, Firmware Manual

Page: 142 / 260

142 Parameters
27.15 PID deriv filter Defines the time constant of the 1-pole filter used to smooth
the derivative component of the process PID controller.
0.00 … 10.00 s Filter time constant. 100 = 1 s
27.16 PID error inv PID error inversion. When the source selected by this
parameter is on, the error (process setpoint – process
feedback) at the PID controller input is inverted.
Const Bit pointer setting (see Terms and abbreviations on page 63 ). -
Pointer
27.18 PID maximum Defines the maximum limit for the PID controller output. Using
the minimum and maximum limits, it is possible to restrict the
operation range.
-32768.0 …
32768.0 Maximum limit for PID controller output. 10 = 1
27.19 PID minimum Defines the minimum limit for the PID controller output. See
parameter
27.18 PID maximum .
-32768.0 …
32768.0 Minimum limit for PID controller output. 10 = 1
27.22 Sleep mode Activates the sleep function.
No Sleep function inactive. 0
Internal The sleep function is activated and deactivated automatically
as defined by parameters
27.23 Sleep level and 27.24 Sleep
delay . The sleep and wake-up delays ( 27.24 Sleep delay and
27.26 Wake up delay ) are effective.
1
External The sleep function is activated by the source selected by
parameter
27.27 Sleep ena . The sleep and wake-up delays
( 27.24 Sleep delay and 27.26 Wake up delay ) are effective.
2
27.23 Sleep level Defines the start limit for the sleep function. If the motor
speed is below this value longer than the sleep delay (
27.24
Sleep delay ), the drive shifts to sleep mode.
-32768.0 …
32768.0 Sleep start level. 10 = 1
No. Name/Value Description FbEq
63
%
100
T
t
O = I × (1 - e
-t /T
)
I = filter input (step)
O = filter output
t = time
T = filter time constant
Unfiltered signal
Filtered signal