ABB ACS560 Firmware Manual page 302

302 Parameters
No. Name/Value
40.34 Set 1 derivation
time
0.000...10.000 s
40.35 Set 1 derivation
filter time
0.0...10.0 s
40.36 Set 1 output min
-200000.00
...200000.00
40.37 Set 1 output max
-200000.00
...200000.00
40.38 Set 1 output freeze
Not selected
Selected
DI1
DI2
DI3
DI4
Description
Defines the derivation time of the process PID controller. The
derivative component at the controller output is calculated on
basis of two consecutive error values (E
to the following formula:
PID DERIV TIME × (E
K
T = 2 ms sample time
S
E = Error = Process reference - process feedback.
Derivation time.
Defines the time constant of the 1-pole filter used to smooth
the derivative component of the process PID controller.
%
Unfiltered signal
100
63
Filtered signal
T
-t/T
O = I × (1 - e
I = filter input (step)
O = filter output
t = time
T = filter time constant
Filter time constant.
Defines the minimum limit for the process PID controller
output. Using the minimum and maximum limits, it is possible
to restrict the operation range.
Minimum limit for process PID controller output.
Defines the maximum limit for the process PID controller
output. See parameter 40.36 Set 1 output
Maximum limit for process PID controller output.
Freezes (or defines a source that can be used to freeze) the
output of the process PID controller, keeping the output at the
value it was before freeze was enabled. This feature can be
used when, for example, a sensor providing process
feedback must to be serviced without stopping the process.
1 = Process PID controller output frozen
See also parameter 40.30 Set 1 setpoint freeze
Process PID controller output not frozen.
Process PID controller output frozen.
Digital input DI1 (10.02 DI delayed
Digital input DI2 (10.02 DI delayed
Digital input DI3 (10.02 DI delayed
Digital input DI4 (10.02 DI delayed
and E
K-1
- E )/T , in which
K-1 S
t
)
min.
status, bit 0).
status, bit 1).
status, bit 2).
status, bit 3).
Def/FbEq16
0.000 s
) according
K
1000 = 1 s
0.0 s
10 = 1 s
0.0
1 = 1
100.0
1 = 1
Not selected
enable.
0
1
2
3
4
5