FujiFilm PXG4, Operation Manuals

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4
Chapter
Proportional Band, Integration Time, Derivative Time
Specifies PID (Proportional Band, Integration Time,
Derivative Time)
• Range P : 0.0% to 999.9%
I : 0 sec to 3200 sec
D : 0.0 sec to 999.9 sec
The following control methods are available with PID settings.
Setting PID
The following steps will explain how to set PID values, using
as an example P=10.0%, I=100 sec and D=20 sec.
ON/OFF
(2 position)
control When PID parameter P = 0, ON/OFF control is
used, regardless of the values for I and D. Use
this function when you want to add simple
controls without worrying about the
controllability.
PID Control Use this function when you want to control with
high controllability. Operates when P
≠ 0, I ≠ 0,
and D ≠ 0, but P, I, and D must be adjusted to
optimal values for the control target. In normal
situations, run auto-tuning to optimally adjust P,
I, and D before using this function.
PI Control When P ≠ 0, I ≠ 0, and D = 0, D control is turned
off and PI control is used.
P Control In principle, P control generates no offset and
PV does not always equal SV. In this situation,
adjust the output convergence value "bAL".
Point
• Running auto-tuning automatically sets PID.
See "Auto-Tuning" (p. xx) for more information.
• The PID settings used during auto-tuning are the
optimal settings. If you wish to change the
responsiveness, adjust PID manually.
• Control normally becomes unstable when "
P
" is set too
small. On the other hand, setting it too big makes the
response slow.
• Set the hysteresis for the on/off control (2 state) with
the parameter "
hyS
".
Caution
Do not activate auto-tuning when using ON/OFF (2 state)
control.
1
Press and hold the key to display "
MMM Mvvvv1111
".
MV1 of the monitoring mode is displayed.
2
Press and hold the key to display the setup
mode channel menu ("
ooo oPPPPEEEE CCCChhhh 1111
"), then use the
keys to display Pid ("
PPP
Piiiidddd CCCChhhh 2222
").
Specify the PID.
3
Press and hold the key, then use the
keys to display P ("
PPP P
").
Specify P (Proportional Band)
4
Press the key, then use the keys to
set P to "10.0".
when the bottom part of the display begins to blink.
5
Press the key to confirm the setting.
6
Repeat steps 3-5 (excluding pressing and holding
the key) for I and D.
7
Press the key to return to the operation mode
PV/SV display.
Operation mode