Modbus TCP PLC

The Modbus TCP PLC is a high-performance programmable logic controller engineered for modern industrial Ethernet environments, combining the simplicity and universal compatibility of the classic Modbus protocol with the speed and reliability of standard TCP/IP networking—making it a vital bridge between OT (Operational Technology) and IT (Information Technology) systems. As one of the world’s most widely adopted industrial communication protocols, Modbus TCP requires no licensing fees, features straightforward configuration, and enjoys exceptional cross-platform support, which explains its prevalence in energy management, water/wastewater treatment, building automation, packaging machinery, OEM equipment integration, and small-to-mid-sized manufacturing lines. Our Modbus TCP PLCs not only integrate a standards-compliant Ethernet port (per RFC 791/793) capable of scan cycles as fast as 50 ms or less but also deliver robust local control functionality—equipped with extensive digital I/O (DI/DO), analog I/O (AI/AO), high-speed counters, and pulse train outputs (PTO/PWM)—enabling them to execute complex logic, PID loops, timing sequences, and data logging independently, without reliance on a host PC. Developed under the IEC 61131-3 standard (typically via CodeSYS or a proprietary IDE), these PLCs support multiple programming languages including Ladder Diagram (LD), Function Block Diagram (FBD), and Structured Text (ST), accelerating development and maintenance. Architecturally, the Modbus TCP PLC can operate simultaneously as both a Modbus TCP Server (slave) and Client (master): as a Server, it allows direct register access from SCADA, HMI, MES, or cloud platforms; as a Client, it actively polls other Modbus TCP devices—such as VFDs, power meters, or temperature controllers—to enable distributed coordination. Built to industrial standards, the series features wide-voltage input (12–24 VDC or 85–264 VAC), extended operating temperature (-25°C to +70°C), IP20 protection, and full compliance with CE, FCC, and IEC 61000-4 EMC requirements for Reliable Performance in demanding environments. Enhanced security models offer basic network safeguards like MAC filtering, IP whitelisting, and port isolation to prevent unauthorized access. Critically, our Modbus TCP PLC is designed for Industry 4.0 readiness—beyond native Modbus TCP, optional dual ports (e.g., RS-485 for Modbus RTU) or internal protocol gateways enable limited interoperability with PROFINET, EtherNet/IP, or CANopen; furthermore, support for OPC UA and MQTT allows seamless data streaming to edge or cloud platforms for energy analytics, predictive maintenance, and digital twin applications. We provide comprehensive engineering resources—including free programming software, GSDML files, Modbus register maps, wiring diagrams, multilingual manuals, and remote technical support—to significantly reduce deployment complexity. Whether you’re building a new automation system or upgrading legacy Modbus RTU installations to Ethernet, choosing our Modbus TCP PLC delivers an open, flexible, cost-effective, and future-proof control core that not only preserves Modbus’ “plug-and-play” heritage but revitalizes it for the smart factory era.