CLS200 Series User’s Guide
Chapter 7: Turning and Control
138
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 7.4 shows general PID constants by application.
Table 7.4 — General PID Constants
APPLICATION
PROPORTIONAL
BAND
INTEGRAL DERIVATIVE FILTER
OUTPUT
TYPE
CYCLE
TIME
ACTION
Electrical heat
with solid
state relays
50° 60 15 4 DZC – Reverse
Electrical heat
with electro-
mechanical
relays
50° 60 15 6 TP 20 Reverse
Cool with
solenoid valve
70° 500 90 4 TP 10 Direct
Cool with fans 10° Off 10 4 TP 10 Direct
Electric heat
with open
heat coils
30° 20 Off 4 DZC – Reverse
Gas heat with
motorized valves
60° 120 25 8 Analog – Reverse
Gas heat with
motorized valves
Setpoint > 1200
100° 240 40 8 Analog – Reverse
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