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Entry type: Application example Entry ID: 103526819, Entry date: 08/15/2019
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Single and Multi Loop Controller Structures (Cascade Control) with PID_Temp

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  • Associated product(s)
You get a TIA Portal project for multi loop controlling using the example of a “chocolate water bath”. The cascade control is realized with the technology object "PID_Temp". The application example is described in detail.

Task
SIMATIC S7-1200 and S7-1500 offer beside an integretad controller a special temperature controller. It is suitable for heating or heating/cooling applications and can be easily cascaded.

Using the example of a “chocolate water bath” scenario, this application shows the realization of a controller-based control for tempering the chocolate temperature. In order to obtain good product properties (e.g. gloss, consistency, and taste), the process needs to be warmed up and cooled down again in several steps.

Solution
This application realises a simulated water bath with three metering points. The simulated process gets controlled by a triple loop control with the integrated controller “PID_Temp”. For comparison reasons a single-loop control with one “PID_Temp” is also realised.



Advantage
The application provides the following advantages:

  • Illustrative example project for the adjustment to own requirements for controlled multi-loop systems (cascade control).
  • Step-by-step instructions for programming and commissioning a triple-loop control system in master-slave interconnection.
  • Direct comparison of control behavior of a single-loop and a controlled triple-loop system via the WinCC user interface.

Downloads

  Documentation (1,9 MB)
 Registrierung notwendig  STEP 7 project for TIA Portal V15.1 (9,0 MB)

Further information
Function manual "SIMATIC S7-1200, S7-1500 PID control"
Application example "Controlling simulated controlled systems in S7-1500 with PID_Compact V2"
Application example "3-Point Stepper Control with SIMATIC S7-1500"
Application example "PID Control with PID_Compact (S7-1200)"
Application example "3-Point Stepper Control with SIMATIC S7-1200 (Set 2)"
Application example "Micro Automation: PI Controller with LOGO! for Simple Applications - Optimum Motor Speed Control (Set 23)"

Security information
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https://www.siemens.com/cybersecurity#Ouraspiration.