Hitachi WJ200-001L, Инструкция по эксплуатации, Страница: 116 / 680

3

31
PID Control
When enabled, the built-in PID loop calculates an ideal inverter output value to cause a
loop feedback process variable (PV) to move closer in value to the set point (SP). The
frequency command serves as the SP. The PID loop algorithm will read the analog input
for the process variable (you specify the current or voltage input) and calculate the
output.
“A” Function
Run
Mode
Edit
Defaults
Func.
Code
Name Description Initial data Units

PID enable Enables PID function,
three option codes:

 PID Disable

 PID Enable


PID Enable with reverse
output
Proportional gain has a range
of 0.00 to 25.00

00



PID proportional gain
 1.0



PID integral time constant Integral time constant has a
range of 0.0 to 3600 seconds
Derivative time constant has a
range of 0.0 to 100 seconds

1.0 sec

PID derivative time constant
 0.00

sec

PV scale conversion Process Variable (PV), scale
factor (multiplier), range of
0.01 to 99.99

1.00 

PV source Selects source of Process
Variable (PV), option codes:


[OI] terminal (current in)

 [O] terminal (voltage in)

 ModBus network


Pulse train input

 Calculate function output

00



Reverse PID action Two option codes:


PID input = SP-PV

 PID input = -(SP-PV)

00



PID output limit Sets the limit of PID output as
percent of full scale,
range is 0.0 to 100.0%

0.0 %

PID feed forward selection Selects source of feed forward
gain, option codes:

 Disabled


[O] terminal (voltage in)

 [OI] terminal (current in)

00



PID sleep function action
threshold Sets the threshold for the
action, set range 0.0~400.0 Hz

0.00 Hz

PID sleep function action
delay time Sets the delay time for the
action, set range 0.0~25.5 sec

0.0 sec
NOTE: The setting

for the integrator is the integrator’s time constant Ti, not the
gain. The integrator gain Ki = 1/Ti. When you set

= 0, the integrator is disabled.