Closed-Loop Compressor; Closed-Loop Pump - Siemens Sinamics G120 Operating Instructions Manual

The analog input is used to set the frequency setpoint.
The system comprises the following components:
● Control Module
● Power Module
● Motor
● Pump
● Motor temperature sensor (optional)
● Level sensor (dry run protection - optional).

Closed-loop compressor

A constant pressure is required to be maintained within a system utilizing the minimum use
of energy.
The pressure in the system is monitored using the PID controller and if the pressure remains
constant then the Inverter will run the system at the minimum frequency to maintain the
pressure.
The setpoints are controlled by analog input 0.
The feedback from the system are received from the pressure sensor utilizing analog input 1.
This feedback is then used by the Inverter to react to changes in the system pressure.
The on/off and reset commands are controlled using digital inputs 0 and 1 respectively.
The general monitoring of the condition of the Inverter is achieved using digital outputs 0, 1
and 2 for drive failure, drive ready and drive running respectively.
The system will comprise of the following components:
● Control Module
● Power Module
● Motor
● Compressor
● Pressure sensor
● Motor temperature sensor (optional).

Closed-loop pump

The closed-loop application allows for the fluid in a tank to be directly monitored using the
PID control function.
The system comprises the following components:
● Control Unit
● Power Module
● Motor
● Pump
Intelligent Operator Panel (IOP)
Operating Instructions, 03/2013, FW V1.4, A5E00110011A4 AB
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