Omron E5AJ-A2HB Operation Manual page 57

Engineering Level Parameters
rd u C/ F Selection
E5jJ with
Communications Function
len Data Bit Length
prty Parity Check
sbit Stop Bit
s.t-b Stable Range ( C/ F)
alfa (α) PID Control Type
To change the temperature display unit from C to F, press the Up Key so that f
will be displayed in the set value display.
The communications specifications of the E5jJ are as follows:
Data bit length: ASCII 7- (set before shipping) or 8-bit code
Parity check: None, even (set before shipping), or odd
Stop bit length: 1 or 2 (set before shipping)
Use the following parameters to change the above setting.
Use this parameter to change the communications data bit length.
Use this parameter to change the communications parity check.
SV
Use this parameter to change the stop bit length.
This parameter is used to decide conditions under which fuzzy self-tuning oper-
ates and can be set within a range of 0.1 to 999.9. If the absolute value of the
deviation (the difference between the process value and set point) is within the
stable range, temperature control operation is deemed smooth and fuzzy self-
tuning will not start.
Set point
PID before tuning
By adjusting internal parameter α of advanced PID within a range of 0.00 to 1.00,
PID control such as derivative preceding PID or proportional preceding PID (I-
PD) control will be possible.
Set point
Difference in set point response due to α.
To increase the set point response speed, decrease the value of parameter α. If
the value of parameter α is decreased, however, the overshooting value will in-
crease.
SV SV
c: C
f: F
SV
SV
It is deemed that the characteristics
of the control device have been
changed so that the response wave-
form is processed to tune the PID
constants.
Stable
Fuzzy self-tuning
α = 0.00 (Derivative preceding PID)
α = 0.65
α = 1.00
(Proportional preceding PID)
Section 9-3
none : None
eUen : even
odd : odd
Stable
range
PID after tuning
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