Auto-Zone Control Systems Auto-Zone CV-C Controller Installation Guide (Version 01A) - Manual (Page 40)

Section 2 Auto-Zone CV-C
2-30 Sequence of Operation
The Integrating Interval ( TimeSP ) controls how many times per minute the calculations
are made. The default number of times per minute is set to 12
( 60 Seconds / 5.0 Seconds = 12 Times Per Minute ). This allows for a rapid reaction to
changes in temperature. If the default Constants and this TimeSP cause unstable
operation, they can be adjusted to bring the valve positioning under control.
NOTE: It is not possible to recommend which variables to change or how much to
change them without firsthand observation of the valve operation.
It is recommended that the default setpoints be used until you can observe actual heating
control and determine if any changes need to be made. Changes made to the PID
Constants should be made in small increments and one at a time. The results should then
be studied before making any further changes.