ABB ACQ80, Firmware Manual

Page: 196 / 390

196 Parameters
40.35 Set 1 derivation
filter time
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
40.36 Set 1 output min
Defines the minimum limit for the process PID
controller output. Using the minimum and
maximum limits, it is possible to restrict the
operation range.
0.00
-100.00...100.00 Minimum limit for process PID controller output. 1 = 1
40.37 Set 1 output max
Defines the maximum limit for the process PID
controller output. See parameter
40.36 Set 1
output min
.
100.00
-100.00...100.00 Maximum limit for process PID controller output. 1 = 1
40.38 Set 1 output
freeze enable
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
enable
.
Not
selected
Not selected Process PID controller output not frozen. 0
Selected Process PID controller output frozen. 1
DI1 Digital input DI1 (
10.02 DI delayed status
, bit 0). 2
DI2 Digital input DI2 (
10.02 DI delayed status
, bit 1). 3
DI3 Digital input DI3 (
10.02 DI delayed status
, bit 2). 4
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