TCP
4 articles tagged "TCP" on the Modbus Poll blog.
This collection brings together every TCP article published on the Modbus Poll blog. "Modbus RTU to TCP Gateway: Bridge Serial Devices onto Ethernet", "Modbus TCP Security Risks: Why It Is Not Safe and How to Protect It", "Modbus TCP Tool for macOS: Test and Debug Devices Without Windows (2026)" — each one is a practical, hands-on guide written for engineers and system integrators who work with Modbus Poll in real industrial deployments. Whether you are choosing between protocols, troubleshooting a connection, or planning an integration, these articles cover the concepts, the trade-offs, and the step-by-step details you need.
Modbus RTU to TCP Gateway: Bridge Serial Devices onto Ethernet
Modbus RTU to TCP gateway explained. Why bridge RS-485 serial devices onto Ethernet, how a gateway routes TCP requests to RTU slaves, latency, hardware vs software gateways.
Read articleModbus TCP Security Risks: Why It Is Not Safe and How to Protect It
Modbus TCP has no authentication, encryption, or integrity — anyone on the network can read and write every register. Segment, firewall, and tunnel it; never expose TCP/502.
Read articleModbus TCP Tool for macOS: Test and Debug Devices Without Windows (2026)
Need a Modbus TCP tool on macOS? MacTools Modbus Poll is a native Mac app for testing and debugging Modbus TCP devices. Read/write registers, simulate slaves, verify register maps.
Read articleModbus RTU vs TCP: Which Variant Should You Use?
Modbus RTU and Modbus TCP use the same protocol but different transports. Frame format, speed, device limits, and when to choose each variant.
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