2Nd Block Parameter; [P] Proportional Band (030); [I] Integral Time (031); [D] Derivative Time (032) - Fuji Electric Micro-Controller X Socket type Operation Manual

Parameter functions and setting procedure

3-2 2nd block parameter

Proportional band (030)
P
Integral time (031)
i
Derivative time (032)
d
[Description] –––––––––––––––––––––––––––––––––––––––––––––––––––––––
Allows you to set PID (Proportional Band, Integration Time, Differential Time).
Setting range
P: 0.0 to 999.9%
i: 0 to 3200 seconds
d: 0.0 to 999.9 seconds
The following control methods are available with PID settings.
●
ON/OFF control
(2-position control)
PID control
PI control
P control
Running auto-tuning automatically sets the optimal PID. (see page 25)
●
The PID settings configured by auto-tuning are generally considered to be optimal settings. If you want to change
●
the responsiveness, adjust PID manually.
Generally, control becomes unstable when [P] is set too small. On the other hand, setting it too big makes the
●
response slow.
If you set [P] to " 0.0 ," the control method parameter [CtRL] automatically turn to " oNoF. "
●
Set the hysteresis for the ON/OFF (2-position) control with the parameter [HyS]. (see page 32)
●
Related parameters: Control algorithm [CtRL] (see page 36)
Do not perform auto tuning during ON/OFF control.
When [P] = " 0 " or the control method [CtRL] is set to " oNoF ," ON/OFF control is
used. Use this function when you want to run simple control without worrying about the
controllability.
Use this function when you want to control with high controllability.
[P], [i], and [d] should be adjusted to optimal values for the control target, although Pid
can be activated by setting the control method [CtRL] to " Pid ," and [P] ≠ " 0.0 ," [i] ≠ " 0 ,"
[d] ≠ " 0.0 ."
In normal situations, run auto-tuning to optimally adjust P, I, and D before using this
function.
When the control method [CtRL] is set to " Pid " and [P]≠" 0.0 ", [i]≠" 0 ", [d]=" 0.0 ," D
control is turned off and PI control is used.
When the control method [CtRL] is set to " Pid " and [P]≠" 0.0 ", [i]=" 0 ", [d]=" 0.0 ,"
I and D controls are turned off and P control is used. In principle, P control generates
offset and PV does not agree with SV. In this case, adjust the output convergence value
[bAL].
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