PLC Programming Services for Industrial Process Equipment
Custom PLC logic for industrial process equipment — from thermal oxidizers, RTOs, furnaces, atmosphere generators and boilers to supporting process systems. Clean, documented code on Allen-Bradley, Siemens, Mitsubishi, Schneider, Omron, Beckhoff, and more — built for maintainability and commissioning handoff.
Platforms We Program
Broad platform expertise across major PLC families — from common industrial platforms to legacy controls retrofits and specialized process systems. Our PLC-in-oxidizer-controls guide shows how that logic fits into thermal processing systems:
Allen-Bradley (Rockwell)
ControlLogix, CompactLogix, Studio 5000, FactoryTalk. Legacy PLC-5 and SLC-500 migration expertise.
Siemens
TIA Portal, S7-1500, S7-300/400 (legacy). PROFINET, MPI, PROFIBUS networks.
Mitsubishi Electric
MELSEC iQ-R, iQ-F, Q/L Series. GX Works programming environment.
Schneider Electric
Modicon M340/M580, EcoStruxure Machine Expert, Unity Pro.
Automation Direct
Click Plus, Do-more. Cost-effective retrofits and small process systems.
Omron
NJ/NX Series, CJ Series. Sysmac Studio. Process and packaging applications.
Beckhoff
TwinCAT 3 (IEC 61131-3). PC-based control for high-speed and precision applications.
CODESYS-Based Platforms
Phoenix Contact, Wago, and other CODESYS runtime environments.
Other Industrial PLCs
Existing controls are reviewed against available software, documentation, I/O, and supportability before any retrofit path is recommended.
What We Deliver
Every program is built around clear sequence structure, tag organization, comments, and startup support for your maintenance team. We develop in IEC 61131-3 languages where appropriate, and many projects continue into our HMI/SCADA development and controls integration work:
Ladder Logic (LD)
Industry-standard relay logic for discrete control
Structured Text (ST)
High-level language for calculations and data handling
Function Block Diagram
Graphical programming for process and PID control
Sequential Function Charts
Step-based programming for batch and sequencing operations
Safety System Interface Support
PLC interface work for existing safety relays, safety controllers, and trip status signals as defined by the project safety basis.
Motion and Drive Control
Servo, VFD, and drive integration for positioning, airflow, speed, and coordinated process control.
Industrial Equipment We Program
Our PLC programming services are strongest where process equipment, temperature control, combustion interfaces, and operator visibility need to work together. Common project paths include RTO and thermal oxidizer controls, furnace and kiln controls, atmosphere generator controls, and HMI/SCADA development:
Our Process
A structured approach keeps scope, schedule, test expectations, and commissioning needs visible before code changes reach the plant floor:
Scope
Define requirements, I/O lists, and functional specifications with your team.
Design
Architecture selection, tag structure, and program outline for review before coding begins.
Program
Write clean, documented PLC code aligned with your standards and naming conventions.
Test
Offline simulation and desktop testing to validate logic before going on-site.
Commission
On-site startup, I/O checkout, loop tuning, and operator handoff support.
Support
Planned remote and on-site support for future changes, troubleshooting, and documentation updates.
Indiana-Based Controls Integrator Support
VIR Automation is based in Fishers, Indiana and supports industrial PLC programming projects across Indiana, Ohio, the Midwest, and selected nationwide sites. If you need a control systems integrator in Indiana for process equipment, thermal systems, or PLC/HMI retrofits, we can help define the next step.