Watlow CLS200 - Manual (Page 177)

CLS200 Series User’s Guide Chapter 8: Tuning and Control
Doc.# 0600-3050-2000 Watlow Anafaze 161
NOTE! While the basic PID algorithm is well defined
and widely recognized, various controllers
implement it differently. Parameters may not
be taken from one controller and applied to
another with optimum results even if the
above unit conversions are performed.
General PID Constants by Application
This section gives PID values for many applications. They
are useful as control values or as starting points for PID
tuning.
Proportional Band Only (P)
Set the proportional band to 7% of the setpoint.
(Example: Setpoint set to 450, proportional band set to 31).
Proportional with Integral (PI)
• Set the proportional band to 10% of setpoint.
(Example: Setpoint set to 450, proportional band set to
45).
• Set integral to 60.
• Set derivative to Off.
• Set the output filter to 2.
PI with Derivative (PID)
• Set the proportional band to 10% of the setpoint.
(Example: Setpoint set to 450, proportional band set to
45).
• Set the integral to 60.
• Set the derivative to 15% of the integral.
(Example: Integral set to 60, derivative set to 9).
• Set the output filter to 2.
Table 8.4 on page 162 shows general PID constants by ap-
plication.