5.3 Description of Function Codes
5-211
FUNCTION CODES
Chap 5
■ PID control (Wakeup level of PID error) (J23)
■ PID control (Wakeup timer) (J24)
When both of the two conditions below are satisfied (AND), the inverter is restarted.
• The discharge pressure has decreased, increasing the frequency (output of the PID processor) to or above the
wakeup frequency (J17) and the wakeup timer (J24) has elapsed.
• The absolute error of the PV (feedback value) against to the SV (command value) is equal to or higher than the
wakeup level of PID error (J23), and the wakeup time (J24) has elapsed.
Figure 5.3-14
J18, J19
PID Control (Upper limit of PID process output, Lower limit of PID process output)
The upper and lower limiters can be specified to the PID output, exclusively used for PID control. The settings are
ignored when PID cancel “Hz/PID” is enabled and the inverter is operated at the reference frequency previously
specified. ( Function codes E01 to E05 data = 20)
■ PID Control (Upper limit of PID process output) (J18)
J18 specifies the upper limit of the PID processor output limiter in %. If the value of “999” is specified to J18, the
setting of the frequency limiter (Upper) (F15) will serve as the upper limit.
■ PID Control (Lower limit of PID process output) (J19)
J19 specifies the lower limit of the PID processor output limiter in %. If the value of “999” is specified to J19, the
setting of the frequency limiter (Lower) (F16) will serve as the lower limit.
J57
PID Control (Dancer position set point)
J57 specifies the dancer position set point in the range of -100% to +100% for dancer control. If J02 = 0 (keypad) is
selected, this function code is applied for the dancer position set point.
It is also possible to modify the set point (PID command) with the / keys on a keypad. If it is modified, the
new set point value is stored as J57 data automatically.
For the setting procedure of the set point (PID command), refer to Chapter 3 “3.3.5 Setting up PID commands from
the keypad.”
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