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E5jJ
d-u °C/°F Selection
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.
SV
E5jJ with Communications Function
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.
len Data Bit Length
Use this parameter to change the communications data bit length.
s.t b Stable Range (°C/°F)
This parameter is used to decide conditions under which fuzzy self-tuning operates 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
alfa (α) PID Control Type
By adjusting internal parameter α of 2-PID within a range of 0.00 to 1.00, PID control such as derivative preceding PID or proportional 2-PID
(I-PD) control will be possible.
To increase the set point response speed, decrease the value of parameter α. If the value of parameter α is decreased, however, the overshoot-
ing value will increase.
ret Automatic Return of Display Mode (Return Time)
By setting automatic return of display mode, the display will return to the normal operation display (on level 0 displaying the process value or set
point) if no key is operated for the time set with this parameter. The return time can be set within a range of 0 to 99 s. If the return time is set to 0 s,
this function will not work. The return time is set to 0 s before shipping.
SV
c: °C
f: °F
Stable
PID before tuning
α = 0.00 (Derivative preceding PID)
Set point
α = 0.65
α = 1.00
(Proportional preceding PID)
Difference in set point response due to α.
prty Parity Check
Use this parameter to change the communications parity check.
SV
SV
sbit Stop Bit
Use this parameter to change the stop bit length.
It is deemed that the characteristics
of the control device have been
changed so that the response wa-
veform is processed to tune the PID
constants.
Fuzzy self-tuning
PID after tuning
E5jJ
SV
none : None
eUen : even
odd : odd
Stable
range
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