Hitachi SJ300-037HFE 사용자 설명서

“A” Group: Standard Functions

Configur

ing Dr

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P

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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 setpoint (SP). The current 
frequency command serves as the SP. The PID loop algorithm will read the analog input for the 
process variable (you specify either current or voltage input) and calculate the output.

• A scale factor in A075 lets you multiply the PV by a factor, converting it into engineering 

units for the process.

•  Proportional, integral, and derivative gains are all adjustable.

• Optional – You can assign an intelligent input terminal the option code 23, PID Disable. 

When active, this input disables PID operation. See 

.

• See 

 for more information.

NOTE: The setting A073 for the integrator is the integrator’s time constant Ti, not the gain. 
The integrator gain Ki = 1/Ti. When you set A073 = 0, the integrator is disabled.

A071 PID Enable

Enables PID function,
two option codes:
00 PID operation OFF
01 PID operation ON

✘ ✔

00

00

00

—

>A071 PID

SW           OFF

A072 PID proportional gain

Proportional gain has a 
range of 0.2 to 5.0

✔ ✔

1.0

1.0

1.0

—

>A072 PID

P            1.0

A073 PID integral time 

constant

Integral time constant has a 
range of 0.0 to 3600 seconds

✔ ✔

1.0

1.0

1.0

sec.

>A073 PID

I        0001.0s

A074 PID derivative time 

constant

Derivative time constant has 
a range of 0.0 to 100 seconds

✔ ✔

0.0

0.0

0.0

sec.

>A074 PID

D         000.00

A075 PV scale conversion

Process Variable (PV) scale 
factor (multiplier), range of
0.01 to 99.99

✘ ✔ 1.00 1.00 1.00

—

>A075 PID

CONV      001.00

A076 PV source setting

Selects source of Process 
Variable (PV), option codes:
00 [OI] terminal (current 

input)

01 [O] terminal (voltage 

input)

✘ ✔

00

00

00

—

>A076 PID

INPUT         OI