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PID controller

€9,90 EUR
€9,90 EUR
Sale Sold out
Description

The FB_PID_Controller function block implements a complete PID controller with anti-windup protection and control output limiting. The code is clearly structured and ready for use in the Siemens TIA Portal – ideal for precise control applications in industry, laboratories, or training.

Note: All modules are designed exclusively as a learning and optimization basis and are not approved for live operation. System modules, in particular, must be finally tested and commissioned by qualified personnel before productive use.

How it works
Calculation of the control value

Once RegelFreigabe is active:

  • Error = Setpoint – Actual value
  • Integral += Error × Cycle Time
  • Differential = (Error – ErrorOld) / Cycle Time
  • StellwertRaw = Kp × Error + Ki × Integral + Kd × Differential
Limit to OutputMax

If StellwertRaw > AusgangMax :

  • Stellwert = OutputMax
  • Integral -= last integral step (anti-windup)
  • StatusText = "Limited to Max"
Limit to OutputMin

If StellwertRaw < AusgangMin :

  • Stellwert = OutputMin
  • Integral += last integral step (anti-windup)
  • StatusText = "Limited to Min"
Normal operation

If StellwertRaw is within the allowed range:

  • Stellwert = Control valueRaw
  • StatusText = “Regulation active”
Save error

At the end of each cycle: FehlerAlt = current error.

Control inactive

If RegelFreigabe is not set:

  • Stellwert = 0
  • StatusText = "Regulation inactive"
Technical details
  • Inputs/Parameters: Setpoint, Actual Value, Kp, Ki, Kd, Cycle Time, OutputMin, OutputMax, Control Enable
  • Internal variables: Error, ErrorOld, Integral, Differential, ControlValueRaw, StatusText
  • Special features: Anti-windup via integral correction; limiting via IF/ELSIF
Possible applications
  • Temperature, pressure, flow or level controls
  • Speed and position controls
  • Didactic examples in laboratory and training
compatibility
  • Siemens S7‑1200 & S7‑1500
  • TIA Portal from V13
  • Recommended: TIA Portal V16+ for HMI & PLCSIM
Scope of delivery

You will receive a fully commented .scl file with:

  • Declaration of all inputs and outputs
  • Internal PID control algorithm with anti-windup

The download link is available immediately after purchase.

Support

I would be happy to help you fine-tune your control parameters, integrate them into HMI layouts, or add additional functions such as auto-tuning or alarm messages.

Contact me via shop message or email.