Chapter 5: Control Modes; Pid Control - Automationdirect.com SOLO Basic User Manual

Chapter 5: Control Modes

The SOLO Basic controller can be configured for any of the following control modes.

PID Control

Auto Tuning
The SOLO Basic controllers support an Auto Tuning feature to set up the
following PID parameters automatically.
p
i
d
pdof
To start the Auto Tuning, set the parameter Auto Tuning (
controller automatically controls the output to change the PV as shown below.
Once the Auto Tuning process is completed, the SOLO Basic controller
calculates the above PID parameters and starts the PID control with the new
parameter values immediately.
Deadband
The range around the PV in which the heating/cooling outputs remain off. A
negative deadband has the opposite effect allowing both outputs to be on in the
area around the PV.
Output
5–2
SOLO Basic Temperature Controller User Manual
• PID control
• On / Off control
• Manual control
Proportional Band
Integral Time
Derivative Time
Integral Offset
Control output
turns off
SV
SV- 2
dead
Dead band: dead
band width=positive
Heating Cooling
0
Set point
Dual control with PID
positive deadband
Cycle
Amplitude
The Auto Tuning ends and
Control output
the PID control starts
turns on
Output
Heating
PV
0
Dual control with PID
negative deadband
) to On. The
AT
Time
dead
Dead band: dead
band width=negative
Cooling
PV
Set point