Qelectrotech Siemens Library ^new^ 【PRO – ANTHOLOGY】

Mastering QElectroTech: How to Build and Use a Siemens PLC Library

1. Official QET Element Repository

• The main QET installation includes many standard IEC symbols, but Siemens-specific components are often in the user-contributed section.
• Visit: https://qelectrotech.org → Elements section.

4. Manual Creation / Import

• You can create your own Siemens symbols using the QET element editor, then save them into custom libraries.

How to Install the Siemens Library for QET

Since QET does not have a built-in "App Store" for vendor parts, you must source the community files:

Method A: The Git Repository (Recommended)

1. Search GitHub for "QElectroTech Siemens" (e.g., user qelectrotech or joshua-sch repositories).
2. Download the .elmt and .qet collection files.
3. In QET, go to File -> Import -> Collection and select the downloaded file.

Method B: Manual Element placement

1. Download individual .elmt files.
2. Navigate to your QET user directory (~/.qelectrotech/elements/ on Linux, %APPDATA%\qelectrotech\elements\ on Windows).
3. Paste them into the siemens subfolder.

Part 8: Troubleshooting Common Siemens Library Issues

Even with a good library, problems arise.

| Problem | Likely Cause | Solution in QElectroTech | | :--- | :--- | :--- | | Terminal numbers disappear when copied | The terminal text was not set as a "dynamic label" | In element editor, select text → Check Dynamic text box. | | The PLC symbol is huge/small | Mismatched grid scale (QET default: 10px per unit) | Re-edit element; set Grid to 5 or 10 mm. | | Wires don't connect to terminals | Terminal contact point is 1mm off the wire grid | Use Snap to grid and move the terminal node precisely. | | Part number doesn't show in BOM | Missing manuf or ref info fields | Right-click element → Properties → Add manufacturer = Siemens AG. | qelectrotech siemens library

Part 5: Working with Siemens PLCs – Dynamic Function Blocks

The most powerful feature of qelectrotech siemens library is the ability to create "Intelligent Elements" that mirror TIA Portal addressing.

Example: Simulating an S7-1200 digital input card. Mastering QElectroTech: How to Build and Use a

Create a Master element (the card) with n child elements (input channels). In QET, use the "Conductors" linking feature.

1. Draw the SM1221 8x 24V DC module.
2. For each input (I0.0 to I0.7), create a terminal link to a generic input symbol placed elsewhere in the schematic.
3. Add dynamic formula: %autotext to auto-increment tags (I0.0, I0.1...).
4. Save the library.

Now, dragging one SM1221 from your library instantly places 8 connected inputs on your drawing, with correct Siemens DB/bit addressing. The main QET installation includes many standard IEC

Pros & Cons of using the Siemens Library

| Pros | Cons | | :--- | :--- | | Free & Open Source: No licensing fees for Siemens symbols. | Not Official: Siemens AG does not endorse or certify these symbols. | | Fast Drafting: Drag-and-drop S7-1200 CPU saves hours. | Part Number accuracy: Double-check MLFB numbers; community data may lag behind new Siemens releases. | | Lightweight: Runs on a $200 laptop. | PLC I/O mapping: You must manually link text fields to your project’s terminal strip. | | XML editable: You can bulk-edit pin labels via text editor. | No auto-panel layout: Unlike EPLAN, QET does not auto-generate cabinet layouts from the library. |

2. QET Community GitHub / GitLab

• Many users share their custom Siemens libraries on GitLab (the official QET repo host). Search for:
  QElectroTech elements Siemens

9. BOM and Export Strategy

• Use symbol metadata to auto-generate BOM CSVs with columns:
  • Tag, PartNumber, Description, Quantity, ReferenceSheet, Location
• Export options:
  • CSV for procurement systems
  • PDF for panel layout documentation
  • DXF/DWG if needed for mechanical layout (export symbol outlines or panel cutouts)
• Include revision control: BOM should include symbol Revision metadata.