Omron E5GN - Page 81

CHAPTER 5 PARAMETERS
E5GN
5–14
Proportional band
Integral time
Derivative time
The control must be 2-PID control.
This parameter sets the PID parameters. Note that PID is automatically set when AT and ST are
executed.
Proportional action : P refers to control in which the MV is proportional to the deviĆ
ation (control error).
Integral action : I gives a control action that is proportional to the time integral
of the control error. With proportional control, there is norĆ
mally an offset (control error). So, proportional action is used
in combination with integral action. As time passes, this conĆ
trol error disappears, and the set point comes to agree with the
control temperature (process value).
Derivative action : D gives a control action that is proportional to the time derivaĆ
tive of the control error. As proportional control and integral
control correct for errors in the control result, the control sysĆ
tem will be late in responding to sudden changes in temperaĆ
ture. Derivative action enables control that is proportional to
a predicted process output to correct for future error.
Parameter Setting Range Unit Default
Proportional band 0.1 to 999.9 EU 8.0
Integral time 0 to 3999 Second 233
Derivative time 0 to 3999 Second 40
FĂRelated parameter
AT execute/cancel" (adjustment level)
Adjustment Level
Function
Setting
See