5.4 Details of Function Codes
5-223
Details of
Function Codes
F codes
E codes
C codes
P codes
H codes
A codes
b codes
r codes
J03 to J09
d codes
U codes
y codes
Chapter 5 Function Code
Feedback filter (J06)
J06 specifies the time constant of the filter for feedback signals under PID control.
- Data setting range: 0.0 to 900.0 (sec)
- This setting is used to stabilize the PID control. Setting too long a time constant makes the system
response slow.
To specify the filter for feedback signals finely under PID dancer control, apply filter time constants fo
analog input (C33, C38 and C43).
J08, J09
PID Control (Pressurization Frequency, Pressurizing Time)
Related Function Code: J15 (Slow flowrate level stop operation frequency level)
J16 (Slow flowrate level stop elapsed time)
J17 (Starting frequency)
Slow flowrate stopping function (J15 to J17)
J15 to J17 configure the slow flowrate stopping function in pump control, a function that stops the inverter
when the discharge pressure rises, causing the volume of water to decrease.
When the discharge pressure increases, the reference frequency (output of the PID controller) below the
stop frequency for slow flowrate level (J15) for the period of slow flowrate level stop latency (J16), the
inverter decelerates to stop. However, the PID control itself continues to operate. When the discharge
pressure decreases, increasing the reference frequency (output of the PID controller) above the starting
frequency (J17), the inverter resumes operation.
PID control (Stop frequency for slow flowrate) (J15)
J15 specifies the frequency which triggers slow flowrate stop of inverter.
PID control (Slow flowrate level stop latency) (J16)
J16 specifies the period from when the PID output drops below the frequency specified by J15 until the
inverter starts deceleration to stop.
PID control (Starting frequency) (J17)
J17 specifies the starting frequency. Set J17 to a frequency higher than the stop frequency for slow flowrate
(J15). If the specified starting frequency is lower than the stop frequency for slow flowrate, the latter stop
frequency is ignored; the slow flowrate stopping function is triggered when the output of the PID controller
drops below the specified starting frequency.
Assignment of PID slow flowrate stopping PID-STP (Function code: E20 to E24, E27, data = 44)
While the slow flowrate stopping, PID-STP outputs ON signal as the inverter stops due to the slow flowrate
stopping function during the PID control. When the signal output that indicates the inverter stopping status is
necessary, assignment of
PID-STP is necessary.
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