ABB ACS850 - Page 142

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