76
Basic setting of the process controller
Type 8792, 8793 REV.2
15.3
PID
.
PARAMETER
– Parameterizing the process controller
The following control parameters of the process controller are manually set in this menu.
DBND 1.0%
Insensitivity range (dead band) of the process controller
KP 1.00
Amplification factor of the (P portion of the PID controller)
TN 999.0
Reset time (I portion of the PID controller)
TV 0.0
Hold-back time (D portion of the PID controller)
X0 0.0%
Operating point
FILTER 0
Filtering of the process actual value input
The automatic parameterization of the PID controller integrated in the process controller (menu
options
KP, TN. TV
) can be implemented with the aid of the
P.TUNE
function (see chapter
“25.5.
P.TUNE – Self-optimization of the process controller”).
Basic information for setting the process controller can be found in chapters “40. Properties of
PID controllers” and “41. Adjustment rules for PID controllers”.
15.3.1
DBND
– Insensitivity range (dead band)
This function causes the process controller to respond from a specific control difference only. This protects
both the solenoid valves in Type 8792, 8793 and the pneumatic actuator.
Factory setting: 1.0% with reference to the range of the scaled process actual value (setting in the
menu
PV-SCALE
→
PVmin
→
PVmax)
.
Enter the parameters as follows:
→
/ Select
PID.PARAMETER
.
→
Select
ENTER
. The menu for parameterizing the process controller is displayed.
→
/ Select
menu option
.
→
Select
INPUT
. The input screen is opened.
→
/
+
Increase value and
-
reduce value
Set value at
*
DBND X.X%
/
X0 0%
/
FILTER 5
→
Select
OK
. Return to
PID.PARAMETER.
→
Select
EXIT
. Return to
P.CONTROL.
→
Select
EXIT
. Return to the main menu (MAIN).
→
Select
EXIT
. Return to
P.CONTROL.
Switching from setting level
process level.
You have set the parameter.
If the submenu is left by pressing the left selection key
ESC
, the value remains unchanged.
english
Summary of Contents for 8792
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