3.3 Selecting PID Control or ON/OFF Control
3-5
Basic
Operations
3.3 Selecting PID Control or ON/OFF Control
Two control methods are supported: 2-PID control and ON/OFF control. Switching between 2-PID control
and ON/OFF control is performed using the control mode switch 1. When this parameter is set to ON,
2-PID control is selected, and when it is set to OFF, ON/OFF control is selected. The default is OFF
(ON/OFF control).
● 2-PID Control
PID control is set by AT (auto-tuning), ST (self-tuning), or manual
setting.
For PID control, set the PID constants in the “proportional band” (P),
“integral time” (I), and “derivative time” (D) parameters.
● ON/OFF Control
In ON/OFF control, the control output is turned ON when the process
value is lower than the current set point, and the control output is
turned OFF when the process value is higher than the current set
point (reverse operation).
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