Software Development
PLC & HMI Programming
Reliable, maintainable control logic and intuitive operator interfaces built on industry-standard platforms.
The Challenge
Poor programming creates operational headaches for years
Control logic written without clear standards becomes increasingly difficult to understand, modify, and troubleshoot over time. When PLCs are programmed by multiple contractors with different coding styles and naming conventions, the result is a maintenance nightmare—no single person can navigate the entire program, and simple modifications require extensive reverse-engineering.
HMI displays suffer from similar problems. Screens that were designed for visual appeal rather than operational effectiveness overwhelm operators with unnecessary graphics, bury critical information in nested menus, and use color coding schemes that make it difficult to distinguish between normal operation, alarm conditions, and equipment status.
Legacy programs on obsolete platforms compound these issues. When the original PLC hardware reaches end-of-life, the entire control program must be migrated to a new platform—a task that's far more complex and expensive when the original code is poorly documented and poorly structured.
Our Approach
Standards-based programming that's built to maintain
Our PLC programs are developed using structured programming practices with consistent naming conventions, modular code organization, and comprehensive documentation. Every program includes a standard library of tested function blocks for common operations—pump control, valve sequencing, PID loops, and alarm handling—so that behavior is predictable and consistent across your entire facility.
Our HMI development follows ISA 101 high-performance graphics principles. Screens are designed for situational awareness—operators can assess the state of a process at a glance without hunting through multiple screens. We use color strategically (to indicate abnormal conditions, not to decorate normal states), consistent navigation patterns, and layered information architecture.
Before any program reaches the job site, it undergoes thorough simulation testing in our office using hardware-in-the-loop and software simulation tools. This catches logic errors, timing issues, and display problems before they affect your operations.
Capabilities
PLC & HMI Programming Capabilities
What we deliver.
PLC Programming
Structured control logic for Allen-Bradley ControlLogix/CompactLogix, Schneider Modicon M340/M580, and Siemens S7 platforms using ladder logic, structured text, and function block programming.
HMI/SCADA Development
Operator interface development on AVEVA InTouch, Rockwell FactoryTalk View, and Inductive Automation Ignition with ISA 101 high-performance graphics.
Program Standards
Consistent coding standards, naming conventions, and modular program architecture that make programs understandable and maintainable by your staff.
Simulation & Testing
Hardware-in-the-loop and software simulation testing to validate control logic and HMI displays before field deployment.
Legacy Program Migration
Migration of PLC programs from obsolete platforms (PLC-5, SLC 500, Modicon Quantum) to current hardware with program restructuring and documentation.
Industries
Industry Applications
How plc & hmi programming applies across sectors.
Water & Wastewater Treatment
Process control programming for filtration, disinfection, aeration, chemical feed, and solids handling systems with regulatory compliance monitoring.
Pump Stations & Infrastructure
Pump sequencing, wet well level control, VFD management, and remote telemetry programming for water and sewer pump stations.
Industrial Automation
Process control, batch management, and operator interface development for manufacturing, food processing, and marine terminal operations.
FAQ
PLC & HMI Programming FAQ
Common questions about this service.
What PLC platforms does Industrial Systems program?
What HMI/SCADA platforms do you work with?
What is ISA 101 high-performance graphics?
Can you migrate our existing PLC programs to new hardware?
Explore More
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