PLC Brands We Program & Integrate
We engineer control solutions across the leading PLC platforms. Each brand brings unique strengths — we help you choose and implement the right one for your application.
Siemens
S7-1200, S7-1500, S7-300/400 legacy
Industry-leading PLCs for process and discrete automation. TIA Portal engineering for seamless integration across all automation components.
Common Use Cases
Rockwell Automation
ControlLogix, CompactLogix, Micro800, PLC-5 legacy
Allen-Bradley ControlLogix and CompactLogix platforms for complex, high-speed control applications with Studio 5000 environment.
Common Use Cases
Delta Electronics
DVP Series, AS Series, AH Series
Cost-effective, reliable PLC solutions ideal for standalone machines and中小规模 automation. Supported by WPLSoft and ISPSoft.
Common Use Cases
Our PLC & Automation Services
From logic design to panel wiring and cloud connectivity — we cover the full lifecycle of industrial control systems.
PLC Programming & Logic Design
Custom ladder logic, FBD, SCL, and ST programming for Siemens, Allen-Bradley, and Delta PLCs. We develop robust, well-documented control logic optimized for your specific process requirements.
HMI & SCADA Development
Operator interface design using Siemens WinCC, Rockwell FactoryTalk View, Delta DOPSoft, and Ignition SCADA. Real-time dashboards, alarm management, trending, and mobile operator access.
Control Panel Design & Wiring
Full electrical panel design, layout, assembly, and wiring per SANS/IEC standards. We integrate PLCs, HMIs, VFDs, breakers, relays, and terminal blocks into clean, maintainable panels.
Industrial IoT & Remote Monitoring
Connect legacy and modern PLCs to cloud platforms via OPC UA, MQTT, and industrial edge gateways. Enable predictive maintenance, production KPIs, and remote troubleshooting from anywhere.
Burner & Process Automation
Specialized burner management systems (BMS) with flame supervision, fuel-air ratio control, and safety interlocks. Process automation for boilers, furnaces, kilns, and dryers using Siemens and Delta platforms.
Fault Diagnosis & System Upgrades
Rapid fault-finding, troubleshooting, and root-cause analysis for malfunctioning control systems. Legacy migration, component replacement, and control system modernization with minimal production disruption.
Industrial Applications We Automate
Our control systems are deployed across diverse industries. Here are the key applications where Cretek delivers measurable impact.
Manufacturing & Production Lines
Automate assembly, filling, labeling, and inspection lines with precise PLC control. Improve throughput, reduce waste, and enable quick changeovers for mixed-product runs.
Boiler & Burner Control Systems
Flame safeguard, fuel-air ratio optimization, burner sequencing, and safety shutdown logic. Compliance with SANS 329 and international burner safety standards.
Water & Wastewater Treatment
SCADA-controlled pump stations, filtration, chemical dosing, and effluent monitoring. Remote telemetry for distributed water infrastructure across municipalities.
Conveyor & Material Handling
Sequencing, speed control, sortation logic, and safety interlocks for conveyor networks. Integration with barcode scanners, weigh scales, and diverters.
Packaging Systems
Cartoners, wrappers, fillers, sealers, and palletizers controlled by Delta and Siemens PLCs with servo-drive synchronization for high-speed packaging lines.
Our Technical Stack
We leverage industry-standard engineering tools and industrial communication protocols to build reliable, future-proof control systems.
Siemens TIA Portal
Engineering framework for S7-1200/1500 PLCs, WinCC HMIs, and drives. One platform for configuration, programming, and diagnostics.
Delta WPLSoft / ISPSoft
Programming environments for Delta DVP, AS, and AH series PLCs. Ladder logic, FBD, and structured text with motion control support.
Studio 5000 (Allen-Bradley)
Rockwell's integrated development environment for ControlLogix and CompactLogix controllers. Logix design, HMI integration, and analytics.
Industrial Protocols
Modbus RTU/TCP, Profibus DP, PROFINET, EtherNet/IP, OPC UA, and MQTT for reliable device communication and IIoT connectivity.
Why Cretek for PLC & Industrial Automation in South Africa?
Cretek is a trusted provider of PLC automation systems and industrial control systems integration across South Africa. Our engineering team delivers end-to-end automation solutions — from concept and design through programming, panel building, commissioning, and ongoing support. Whether you need Siemens PLC programming services for a water treatment plant, Allen Bradley control systems for an automotive assembly line, or Delta PLC solutions for a packaging machine, we have the certified expertise to deliver.
We specialize in SCADA and HMI integration that gives operators real-time visibility and control over their processes. By combining PLC programming with industrial control systems integration, we help South African manufacturers reduce downtime, improve product quality, and achieve Industry 4.0 readiness. Our team is based in Boksburg, Gauteng, and provides on-site services in Johannesburg, Pretoria, Midrand, and across the country.
Every system we build is designed for reliability, safety, and scalability. We use Siemens TIA Portal, Rockwell Studio 5000, and Delta WPLSoft/ISPSoft to program PLC automation systems that meet SANS/IEC standards. Our industrial control systems integration covers communication protocols including Modbus, Profibus, PROFINET, and EtherNet/IP, ensuring seamless connectivity between PLCs, drives, sensors, HMIs, and SCADA platforms.
PLC Automation — Frequently Asked Questions
What is a PLC and how does it work?▼
A Programmable Logic Controller (PLC) is an industrial-grade digital computer that controls machinery and processes. It reads inputs from sensors, executes a programmed logic sequence (ladder logic, FBD, SCL), and controls outputs such as motors, valves, and actuators. PLCs operate in real time and are built to withstand harsh industrial environments including heat, vibration, and electrical noise.
Which PLC brand is best for my application?▼
The right brand depends on your application complexity, budget, and existing infrastructure. Siemens S7-1500 is excellent for process control and mid-to-large systems. Allen-Bradley CompactLogix excels in high-speed discrete control. Delta DVP/AS series offers cost-effective solutions for standalone machines. Our engineers provide a free assessment to recommend the optimal platform.
Can you upgrade or modernize my old control system?▼
Yes. We frequently migrate legacy systems including Siemens S5, Allen-Bradley PLC-5/SLC-500, and Mitsubishi FX/A series to modern platforms. We convert existing ladder logic, replace outdated hardware, upgrade SCADA systems, and commission the new system with minimal production interruption.
Do you support both Siemens and Allen-Bradley systems?▼
Absolutely. Our team holds certifications in both Siemens (TIA Portal, Step 7, WinCC) and Rockwell Automation (Studio 5000, RSLogix 5000, FactoryTalk View). We also program Delta, Schneider, Mitsubishi, and Omron PLCs. Multi-platform expertise means we recommend the best solution — not just the one we know.
How long does a typical PLC programming project take?▼
Timelines vary by complexity. A simple machine control program may take 1-2 weeks, while a multi-PLC SCADA system for a production line can take 6-12 weeks including design, programming, simulation, factory acceptance testing (FAT), site installation, and commissioning. We provide clear timelines during the proposal stage.
Do you provide on-site commissioning and support?▼
Yes. Our engineers travel to your site for installation, wiring verification, loop checking, PLC commissioning, HMI configuration, and SAT (Site Acceptance Testing). We also offer ongoing support contracts, remote monitoring, and 24/7 emergency call-out across Gauteng and South Africa.
Get Your Automation System Designed
Tell us about your project. Our engineering team will assess your requirements and provide a tailored proposal for your PLC, HMI, or control system within 48 hours.