Siemens S7-300 PLC Programming and Support
Plenty of UK plants still run on S7-300 and Step 7. They work, until they do not.
Bubble Automation supports S7-300 systems with modifications, fault finding and backups, and can plan a migration to S7-1500 when the time is right.
Visit the Bubble Automation website for more information on Siemens S7-300 PLC Programming and Support