Entering The Parameters For The Pid Function - Burkert 8619 Operating Instructions Manual

INVERSION: Used to invert (choose "ON") or not (choose "OFF") the operating direction of the output
depending on the indication of the difference between setpoint (SP) and measurement (PV). This function is
used in particular in an acid-base regulation.
Fx: (CMD)
100%
0%
Fig. 76: Operating direction of the output, non-inverted or inverted
9.18.2

Entering the parameters for the PID function

Refer to section 8.10 to access the Parameters menu.
Parameters Functions
This is
when the
device is be-
ing parame-
tered............
....................
1) If "SP Type"= "Internal", see section 9.18, page 116.
SAMPLE TIME: Define the sampling time (0.1...60 s).
SP: Enter the setpoint value.
PV FILTER: Choose the level of attenuation of the chosen process variable. See Fig. 53: Filtering curves.
DEADBAND: Define the percentage (0...100 %) of the deadband around the setpoint value.
KP: Define the proportional gain applied to the difference between the setpoint value and the measured
value.
TN: This parameter represents the integral part of the PID module used to eliminate the static error between
the measurement and the setpoint. Enter a value of 0.1...9999 seconds (default value: 9999 s).
TV: This parameter represents the drift part of the PID module used to react quickly to variations in meas-
urement or setpoint and anticipate variations on the controller. Use this variable on slow processes. Enter a
value of 0.0...9999 seconds (default value: 0.0 s).
118
Non-inverted mode
Process measurement
Setpoint (SP)
F1...F12:
This is
when the
device is be-
ing parame-
tered............
....................
Parameters
English
Fx: (CMD)
100%
0%
Setpoint (SP)
PID
Sample time: ENTERING
PV filter: None
Fast
Slow
SP-PV: ENTERING
Channel 1/2 Dead band:
Kp:
Tn:
Tv:
Advanced
Type 8619
Parameters menu
Inverted mode
Process
measurement
1)
ENTERING
ENTERING
ENTERING
ENTERING
X0: ENTERING
Lim-: ENTERING
Lim+: ENTERING
State OFF: ENTERING