PLC automation engineers and IEC 61131-3 developers

Digiventi provides PLC automation engineers who join your team to develop industrial control software for new machinery or extend existing programs. Start with control requirements and an assessment of the installed application to identify sequencing gaps and recovery requirements.

• IEC 61131-3 developers: Write Structured Text and Ladder Diagram, with reusable function blocks and explicit fault states.
• Platform-specific programming: Modify applications in Siemens TIA Portal or Rockwell Studio 5000, matching controller capabilities and the site's coding conventions.

Connect machine control to the interfaces operators and production systems rely on. HMI developers configure screens and alarm handling in platforms such as Siemens WinCC, with clear indications of machine state and permitted operator actions.

Industrial control software engineers implement OPC UA data exchange or PROFINET device communication. They define signal mappings and test handshake logic against interface specifications. For intermittent communication faults, they investigate timeout behavior and connection recovery rather than masking failures with repeated retries.

Bring in a commissioning engineer when control software needs validation before equipment acceptance or a production change. Testing follows the agreed functional specification, with traceable defects and repeatable checks.

• Factory and site acceptance testing: Prepare test cases, verify I/O mappings, exercise operating sequences and record deviations for correction.
• Fault diagnosis: Trace interlock failures and unexpected state transitions using controller diagnostics and online monitoring. Check recovery behavior after interrupted cycles; safety-related changes require separate validation under the applicable machinery safety process.

Keep installed controls maintainable as equipment requirements change. PLC support engineers investigate recurring stops and modify existing applications without replacing working logic unnecessarily. They reconcile online programs with stored source files before making changes.

For controller obsolescence or software upgrades, specialists review hardware compatibility and identify unsupported instructions. Work can include program conversion and HMI adjustments, followed by regression testing. Version-controlled source and verified backups support controlled releases, with rollback steps agreed before a planned shutdown.