ABB ACQ810 - Page 189

Parameters 189
27.16 PID error inv PID error inversion. When the source selected by this
parameter is on, the error (process setpoint – process actual
value) at the PID controller input is inverted.
Const Bit pointer setting (see Terms and abbreviations on page
109).
-
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
27.30 Pid ref freeze Freezes, or defines a source that can be used to freeze, the
setpoint (reference) input of the process PID controller. This
feature is useful when the reference is based on a process
feedback connected to an analog input, and the sensor must
be serviced without stopping the process.
The setpoint input of the PID controller is frozen as long as
the selected source is 1.
See also parameter 27.31 Pid out freeze.
No Process PID controller input not frozen. 0
Freeze Process PID controller input frozen. 1
DI1 Activation of digital input DI1 (as indicated by 02.01 DI
status, bit 0) freezes process PID controller input.
1073742337
DI2 Activation of digital input DI2 (as indicated by 02.01 DI
status, bit 1) freezes process PID controller input.
1073807873
DI3 Activation of digital input DI3 (as indicated by 02.01 DI
status, bit 2) freezes process PID controller input.
1073873409
DI4 Activation of digital input DI4 (as indicated by 02.01 DI
status, bit 3) freezes process PID controller input.
1073938945
DI5 Activation of digital input DI5 (as indicated by 02.01 DI
status, bit 4) freezes process PID controller input.
1074004481
Const Bit pointer setting (see Terms and abbreviations on page
109).
-
Pointer
No. Name/Value Description FbEq
04.05
27.12
27.01 PID
setpoint sel
27.13
27.14
27.15
27.16
27.18
27.19
PID
Process actual value
(group 28 Procact sel)