Fuji Electric FRENIC-HVAC User Manual page 539

J510 External PID Control 1
J511
J512 P (Gain)
J513 I (Integral time)
D (Differential time)
(Feedback filter)
P (Gain)
I (Integral time)
D (Differential time)
(Feedback filter)
The table below lists function codes to be used for setting the P (gain), I (integral time), D
(differential time) and feedback filter for external PID controls.
External PID control 1
External PID control 2
External PID control 3
For details of P action, I action, D action, as well as their coordinated controls and adjusting
method, see the description of J110, J111, J112, J210, J211, and J212. Note that the P (gain)
of External PID (J510, J610, J660) correspond to J110 and J210. Also, I (integral time) (J511,
J611, J661) correspond to J111 and J211, and the D (differential time) (J512, J612, J662)
correspond to J112 and J212.
 P gain (External PID control 1: J510, External PID control 2: J610,
External PID control 3: J660)
J510/J610/J660 specifies the gain for the external PID processor.
- Data setting range: 0.000 to 30.000 (times), ON/OFF
P (Proportional) action (0.000 to 30.000 times)
An operation in which the MV (manipulated value: output frequency) is proportional to the
deviation is called P action, which outputs the MV in proportion to deviation. However, the P
action alone cannot eliminate deviation.
Gain is data that determines the system response level against the deviation in P action. An
increase in gain speeds up response, but an excessive gain may oscillate the inverter output. A
decrease in gain delays response, but it stabilizes the inverter output.
J515 (PID Control 1 (ON/OFF control hysteresis width)
J610 (PID Control 2 (P (Gain))
J611 (PID Control 2 (I (Integral time))
J612 (PID Control 2 (D (Differential time))
J613 (PID Control 2 (Feedback filter))
J615 (PID Control 2 (ON/OFF control hysteresis width)
J660 (PID Control 3 (P (Gain))
J661 (PID Control 3 (I (Integral time))
J662 (PID Control 3 (D (Differential time))
J663 (PID Control 3 (Feedback filter))
J665 (PID Control 3 (ON/OFF control hysteresis width)
I
P (gain) (integral
time)
J510 J511
J610 J611
J660 J661
6-229
6.3 Details of Function Codes
D
(differential time) Feedback filter
J512 J513
J612 J613
J662 J663