Stopwatch / Timer Project

This function block provides either a stopwatch or a countdown . Time intervals can be flexibly measured or counted down using start, stop, and reset inputs. The remaining or elapsed time is displayed in minutes and seconds. In countdown mode, a buzzer (optional) provides an audible signal when the target time expires.

Available both as an SCL version and as an FUP block for easy integration into different programming styles.

Note: This module is designed exclusively as a learning and optimization basis and is not approved for live operation. Especially in automation projects, the function must be tested and approved by qualified personnel before productive use.

When the start signal is activated, the current system time is saved as a reference point. Timing begins. A stop signal freezes the running time and holds it until the next start. A reset signal resets all values ​​to zero and deactivates the buzzer.

In countdown mode, the module counts down to the preset target time. As soon as the value reaches 0, the buzzer is triggered. In stopwatch mode, the time counts up continuously, without a limit.

• Programming languages: SCL and FUP (optionally available)
• Measuring modes: Switchable between stopwatch and countdown via parameter
• Control: Start, stop, reset via Boolean inputs
• Time display: Minutes and seconds as INT values ​​for display
• Buzzer output: Active when countdown mode expires
• Timer: Use of a permanent free-running timer (IEC compliant)
• Internal management: start time, accumulated time, difference time, display values

• Test benches and test systems with time measurement
• Break or process time recording in PLC programs
• Teaching and demonstration projects
• Basis for complex time-controlled processes

Thanks to the additional FUP version, the block can also be used in simpler control projects – without SCL knowledge.

• Siemens S7-1200 and S7-1500 controllers
• TIA Portal version V13 or higher (recommended: V16 or newer)
• Tested with PLCSIM
• Available as SCL and FUP module
• Adaptable for other IEC-compliant controllers

• Editable SCL source code including all inputs/outputs and internal variables
• Additionally: FUP variant with the same functions
• Commented structure for easy adaptation
• Example call with typical parameters
• Brief description of commissioning (on request)

Delivery will be digital after purchase.

I support you with:

• Integration into your existing PLC application
• Parameterization and extension of functions
• Individual adjustments for specific requirements
• Simulation with PLCSIM or real commissioning

Support via email ( info@PLC-Code.com ) or shop message. Individual customization possible.