The S7-300 is probably the most common Siemens PLC still running in UK factories. It has been fitted to everything from automotive lines and packaging machines to water treatment works and process plant.

Bubble Automation programs and supports S7-300 systems every week. We modify existing programs for new products and process changes, add new I/O and functions, and carry out fault finding when things go wrong. Our engineers are conversant in Ladder, FBD, STL and SCL, so whatever language the original programmer chose, we can work with it.

Many S7-300 programs were written in Step 7 Classic. Others have been brought into TIA Portal. We work in both, and can help you decide whether it is worth moving an older Step 7 project into TIA Portal while you are making changes.

Every job starts with a backup. Every job finishes with a documented, working program and a copy for your records. Simple habits, but they make the difference when the next breakdown happens at 3am.