Packaging machines

Description

This function block controls a complete packaging station—including conveyor belt, pusher, and heat-sealing module—in a compact, well-structured SCL code. With integrated safety checks, start/stop control, and step-by-step process logic, it can be implemented immediately in the Siemens TIA Portal.

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

The process begins with a safety check: An active emergency stop immediately switches off all outputs, resets the controller to step 0 and prevents any further action – safety comes first.

In automatic mode, the cycle starts with the start button. A stop command brings everything to a safe stop and resets the controller. Once the cycle is active, a defined sequence of steps runs:

1. Start conveyor belt – the product is approached
2. Conveyor time expires – belt continues to run for a defined period
3. Extend the slider – until the limit switch is reached
4. Heat sealing – the sealing module is operated exactly for the specified time
5. Back to step 0 – cycle ends or starts again

If the cycle is deactivated, all components automatically switch to safe sleep mode.

Technical details

• The sequence control is based on an integer step counter (FSM)
• Time controls such as conveying time or sealing time are controlled via an IEC timer (TON)
• Limit switches ensure mechanical safety for the slider
• Emergency stop and stop signals have top priority and always lead to immediate shutdown
• A status variable shows the operating status and is perfect for visualization in the HMI or for connection to the SCADA system

Possible applications

Whether in food packaging, cosmetics production, or pharmaceutical filling lines, this functional module is versatile. It also impressively demonstrates how practical step-chain logic can be combined with safety functions in training courses and demo systems.

compatibility

• Compatible with Siemens S7-1200 and S7-1500
• Ready for use in TIA Portal from version V13
• Version V16 or higher is recommended for simulations, testing and HMI integration
• Fully simulated with PLCSIM – no hardware required

Scope of delivery

• .scl file with all input and output declarations
• Complete timer and step chain logic
• Clearly documented safety and limit switch functions
• Notes on emergency stop, cycle times and parameterization in the header area
• Download link available immediately after purchase

Support

I am happy to support you with:

• the adjustment of conveying and sealing times
• the extension with additional sensors or security functions
• integration into existing control systems or visualizations

Simply contact us by email or via shop support – and together we will implement your requirements.