22
User Manual
Zenex Pro
PAGE 11 : SUPERVISORY PARAMETERS
Table 9.1
Parameter Description
Settings
Default Value
TUNE / OPTIMIZE COMMAND
(For PID Control Mode only)
Set to ‘Yes’ for initiating Tune / Optimize operation.
TUNE / OPTIMIZE ABORT COMMAND
(For PID Control Mode only)
Set to ‘Yes’ for terminating Tune / Optimize operation in progress.
OVERSHOOT INHIBIT
(For PID Control Mode only)
Set this parameter to ‘Enable’ if the process exhibits unacceptable
overshoot upon start-up or a step change in SP. If enabled, the
controller controls the rate of change of PV to minimize overshoot.
OVERSHOOT INHIBIT FACTOR
This parameter adjusts the effectiveness of the Overshoot Inhibit
feature. Increase the value if the overshoot is curbed but the PV
takes longer to reach the SP. Decreases the value if the overshoot
persists.
1.0 to 2.0
1.2)
(Default :
SELF-TUNE ON SETPOINT CHANGE
Enable
Re-tune the controller if there is a substantial (large) change in the
SP value. The P, I, D values are optimized.
Disable
Ignore any change in SP value and continue with the existing P, I,
D values.
OFFSET FOR PV
This parameter adds positive or negative offset to the measured
PV for removal of thermal gradient or known sensor error.
-1999 to 9999
or
-199.9 to 999.9
(Default :
0)
DIGITAL FILTER FOR PV
0.5 to 25.0 Seconds in
steps of 0.5 Seconds
(Default :
1.0)
This value determines the averaging rate of measured PV and
thus helps removing undesired rapid changes in the measured
PV. The higher the filter value the better the averaging but the
slower the response to actual changes.
Yes
No
(Default :
No)
Yes
No
(Default :
No)
Enable
Disable
(Default :
Disable)
Enable
Disable
(Default :
Disable)
Section 9
