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Parameters 285
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
K-1
and E
K
) according
to the following formula:
PID DERIV TIME × (E
K
- E
K-1
)/
T
S
, in which
T
S
= 2 ms sample time
E = Error = Process reference - process feedback.
0.000 s
0.000…10.000 s
Derivation time.
1000 = 1 s
Defines the time constant of the 1-pole filter used to smooth
the derivative component of the process PID controller.
0.0 s
0.0…10.0 s
Filter time constant.
10 = 1 s
Defines the minimum limit for the process PID controller
output. Using the minimum and maximum limits, it is possible
to restrict the operation range.
0.0
-32768.0…
32767.0
Minimum limit for process PID controller output.
1 = 1
Defines the maximum limit for the process PID controller
output. See parameter
100.0
-32768.0…
32767.0
Maximum limit for process PID controller output.
1 = 1
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
.
Not selected
Process PID controller output not frozen.
0
Selected
Process PID controller output frozen.
1
DI1
Digital input DI1 (
, bit 0).
2
DI2
Digital input DI2 (
, bit 1).
3
DI3
Digital input DI3 (
, bit 2).
4
DI4
Digital input DI4 (
, bit 3).
5
No.
Name/Value
Description
Def/FbEq16
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
ACS580 FW.book Page 285 Wednesday, September 21, 2016 9:48 PM
Содержание ACS580 Series
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Страница 444: ...440 Fieldbus control through a fieldbus adapter ACS580 FW book Page 440 Wednesday September 21 2016 9 48 PM ...
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