Omega FUZZY LOGIC CN4800, Manual

Page: 55 / 102

53
2. 2-POINT (ON-OFF) CONTROL
When PID control is specified as the control type, setting P to 0.0
provides the 2-point (ON-OFF) control operation.
(2-point operation hysteresis)
Set the 2-point operation hysteresis
with engineering values. (0~100%
FS D.E.U.)
3. FUZZY CONTROL
Employing Fuzzy Logic control eliminates system overshoot and
effectively suppresses fluction of the process variable due to external
disturbances. See the section describing control type setting (page75).
NOTES
1. The dual output type does not allow use of fuzzy control.
2. Though the fuzzy control also requires setting of parameters P, I,
and D, these values can be set to those being used in PID control.
Auto tuning is also available.
4. DUAL CONTROL
* This function is an option.
If the process heats itself, cooling control is needed in addition to
heating control. The dual control is used for control of that process.
HYS
PV
Set point
Output OFF
Output ON
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