Siemens SINAMICS G120P, Operating Instructions Manual

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Operation
6.10 Operation with the IOP
Inverter cabinet units
304
Operating Instructions, 12/2014, A5E32923362A
PID wizard
In industrial applications, closed-loop control is deployed in many processes. A simple
closed-loop control is based on an actual value signal of the process (e.g. temperature,
pressure or speed) and a predefined value or setpoint. The closed-loop control system
compares these two values from which it derives a planned-actual difference. This planned-
actual difference is used to regulate the inverter and the motor so that the difference is
reduced.
System delays can make the processing of the planned-actual difference very complex. The
planned-actual difference is processed by a PID closed-loop controller (proportional, integral,
differential) whose parameters can be adapted to achieve an optimum system performance
and stability.
The "PID Wizard" navigates you when setting up the PID control.
6.10.2.1 Wiring diagrams
Overview
Because the IOP wizards prompt the user through the setting and commissioning of
applications, a certain technical competency, qualification and practical experience of the
user is assumed.
The user must be a qualified and experienced drive technician because the commissioning
of an application requires comprehensive knowledge.
The technician must also be familiar with all technologies and protocols of the following
components/elements:
● PLC - setting, programming and communication
● Inverter - setup, wiring and commissioning
● All relevant international and local safety regulations
The provided information applies to the wiring of the application (inverter inputs/outputs and
communications connections).
Prerequisites
Before the IOP wizards are used, the following must be ensured:
● All required units are available and have been installed correctly in accordance with the
relevant circuit diagram of the associated application wizard.
● The inverter, motor and the other units of the application have been wired in accordance
with the attached circuit diagrams.
● All required information (e.g. motor type data) is available.
● All components of the system have been checked for their correctness and proper
installation.