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Selecting PID Control or ON/OFF Control Section 3-4
3-4 Selecting PID Control or ON/OFF Control
The E5AZ/E5EZ supports two control methods, 2-PID control and ON/OFF
control. The control method is selected by the “PID ON/OFF” parameter in the
“initial setting level”. When this parameter is set to “pid”, 2-PID control is set,
and when set to “onof”, ON/OFF control is set (default).
2-PID control
PID control is set by AT (auto-tuning), ST (self-tuning) or manual setup.
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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