ABB ACS880-x04, Firmware Manual

Page: 311 / 604

Parameters 311
37.41 ULC overload timer Defines the time for which the monitored signal must
continuously stay above the overload curve before the drive
takes the action selected by
37.03 ULC overload actions .
20.0 s
0.0 … 10000.0 s Overload timer. 1 = 1 s
37.42 ULC underload
timer Defines the time for which the monitored signal must
continuously stay below the underload curve before the drive
takes the action selected by
37.04 ULC underload actions .
20.0 s
0.0 … 10000.0 s Underload timer. 1 = 1 s
40
40 Process PID set 1 Parameter values for process PID control.
The drive contains a single active PID controller for process
use, however two separate complete set-ups can be
programmed and stored.
The first set is made up of parameters
40.07 … 40.56 *, the
second set is defined by the parameters in group 41 Process
PID set 2 . The binary source that defines which set is used is
selected by parameter 40.57 PID set1/set2 selection .
See section Process PID control (page 66 ), and the control
chain diagrams on pages 598 and 599 .
*The remaining parameters in this group are common for both
sets.
40.01 Process PID output
actual Displays the output of the process PID controller. See the
control chain diagram on page
599 .
This parameter is read-only. The unit is selected by parameter
40.12 Set 1 unit selection .
-
-32768.00 …
32767.00 Process PID controller output. 1 = 1 unit
40.02 Process PID
feedback actual Displays the value of process feedback after source selection,
mathematical function (parameter
40.10 Set 1 feedback
function ), and filtering. See the control chain diagram on page
598 .
This parameter is read-only. The unit is selected by parameter
40.12 Set 1 unit selection .
-
-32768.00 …
32767.00 Process feedback. 1 = 1 unit
40.03 Process PID
setpoint actual Displays the value of process PID setpoint after source
selection, mathematical function (
40.18 Set 1 setpoint
function ), limitation and ramping. See the control chain
diagram on page 599 .
This parameter is read-only. The unit is selected by parameter
40.12 Set 1 unit selection .
-
-32768.00 …
32767.00 Setpoint for process PID controller. 1 = 1 unit
40.04 Process PID
deviation actual Displays the process PID deviation. By default, this value
equals setpoint - feedback, but deviation can be inverted by
parameter
40.31 Set 1 deviation inversion . See the control
chain diagram on page 599 .
This parameter is read-only. The unit is selected by parameter
40.12 Set 1 unit selection .
-
-32768.00 …
32767.00 PID deviation. 1 = 1 unit
No. Name/Value Description Def / FbEq16