Hitachi SJ Series User Manual page 256

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12.10 Process Control Conforming to

Use PID Control

• We want to perform process-control for flow rate,

air flow, pressure and others.

• We want to switch PID control and normal control.

• We want to set soft-start for prevention of water

hammer of the pump.

• We want to conserve energy by stopping the motor

when the flow rate, air flow, pressure and others

exceed a certain output.

• SJ-P1 is equipped with 4 independent PID

functions, and each PID can be set independently.

• Four PID functions can be used for motor control by

switching the [PIO1]/[PIO2] terminals.

• PID not used for motor control can be used for

operation of exterior PID not related to inverter

control freely.

This helps to save space and cost because there is

no need to install a separate PID controller.

• PID1 can be controlled based on 3 deviations.

• Connecting PID1 and PID2 can make 2-layer PID

control possible.

Pressure gauge

Inverter Functions

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