78
Typ EP 501
Start-Up
23.3.2.
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 the device 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)
.
Operating structure:
EXIT
Input value
ENTER
INPUT
OK
ESC
PID.PARAMETER
DBND 1.0 %
FILTER 0
Figure 33:
Operating structure DBND; insensitivity range
Insensitivity range for process control
Process
set-point value
(SP)
Control
difference
Xd2
Process
actual value
(PV)
Xd2
Xd2‘
Xd2‘
to the controller
Dead band
Figure 34:
Diagram DBND; insensitivity range for process control
23.3.3.
KP
– Amplification factor of the process controller
The amplification factor specifies the P-contribution of the PID controller
(can be set with the aid of the
P.TUNE
function).
Factory setting: 1.00
Operating structure:
EXIT
Input value
ENTER
INPUT
OK
ESC
PID.PARAMETER
KP 1.00
FILTER 0
DBND 1.0 %
Adjustment range: 0 ... 99.99
(% / set unit)
Figure 35:
Operating structure KP; amplification factor
The
KP
amplification of the process controller refers to the scaled, physical unit.
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