West Control Solutions ProVU 4 - Manual (Page 58)

ProVU4 Controller, Profiler & Recorder/Controller - Product Manual
59407, Issue 1 – March 2008 Configuration & Use Page 57
Resetting To Defaults
Table 18. Reset To Defaults Sub-Menu Screen
Reset To Defaults:
Reset To Defaults Sets all parameters to their factory default values.
If the instrument is to be used in a new or changed application, it is possible to reset all of the
instruments parameters back to their factory default settings. The Easy Setup Wizard runs
automatically whenever a Reset To Defaults is performed.
CAUTION:
User must reconfigure all required settings before using the instrument in a live
application.
Automatic Tuning Menu
The Automatic Tune Menu is used engage the Pre-tune and Self-tune facilities to assist the
user in setting up Proportional band(s), Integral and Derivative parameter values.
Pre-tune can be used to set PID parameters approximately. Self-tune may then be used to
optimise the tuning if required.
Pre-tune can be set to run automatically after every power-up by enabling Auto Pre-Tune.
The TUNE indicator (LED 3)* will flash while pre-tune is operating, and is continuously on
whilst Self-tune is operating. If both Pre-tune and Self-tune are engaged the AT indicator will
flash until Pre-tune is finished, and is then continuously on.
Note:
Self-Tune will not engage if either primary or secondary control outputs are set for On-Off
control.
Pre-Tune will not engage if either primary or secondary control outputs are set for On-Off
control, during setpoint ramping, if a profile is running or if the process variable is less than
5% of the input span from the setpoint.
Navigating Automatic Tuning Menu
Press

to move forward or

to move backwards through selections.
Press

or

to engage or disengage the tuning as required.
Hold down

and press

to return to the Main Menu
Scrolling “Help Text” is shown at the bottom of the screens to aid navigation.
*Provided the function of LED3 has not been changed.