#PLC communication
69 articles tagged with #PLC communication. This page is set to noindex per SEO configuration.
Modbus TCP Schneider M340: Unity Pro Setup Guide
Modbus TCP Schneider M340 configuration: CPU embedded port, NOE 0100 and NOC 0401 modules, server and client roles, READ_VAR, WRITE_VAR, and ADDM explained.
Modbus Exception Codes Explained: Complete Reference
Modbus exception codes 01 through 0B in full: Illegal Function, Illegal Data Address, Slave Device Failure, and gateway errors, each with the fix that works.
CIP Object Model Explained: Classes, Instances, Attributes, and Services
Understand the CIP object model used in EtherNet/IP, DeviceNet, and ControlNet. Covers classes, instances, attributes, services, Forward Open, and error codes.
Top 10 Free Modbus Simulators
Top 10 free Modbus simulators for RTU and TCP testing — slave and master tools with setup steps, command-line examples, and download links.
Wireshark EtherNet/IP: Decode CIP Traffic
Wireshark EtherNet/IP capture and decode: CIP services, Forward_Open on TCP 44818, implicit I/O on UDP 2222, status codes, and connection troubleshooting.
Wireshark Modbus RTU: Decode Serial RS-485 Traffic
Wireshark Modbus RTU over RS-485: COM port setup with a serial adapter, DLT 147 configuration, display filters, and how to read framing and CRC errors.
PROFINET TIA Portal Configuration: Step-by-Step Guide
PROFINET TIA Portal configuration step by step: GSD install, device naming, module setup, I/O address mapping, update time, download, and online diagnostics.
Modbus TCP CompactLogix Setup in Studio 5000
Modbus TCP CompactLogix setup with Rockwell's free AOI in Studio 5000: client and server roles, AOI parameters, polling multiple devices, and gateway options.
PROFINET vs EtherNet/IP: Complete Comparison for Industrial Engineers
PROFINET vs EtherNet/IP compared: protocol architecture, real-time performance, GSDML vs EDS, PROFIsafe vs CIP Safety, installed base, and when to choose each.
Wireshark Modbus TCP: Capture, Filter, Troubleshoot
Wireshark Modbus TCP analysis end to end: display filters, MBAP header decoding, exception responses, timeouts, and what each failure looks like on the wire.
Wireshark PROFINET: Decode RT, DCP, and IO Traffic
Wireshark PROFINET capture and decode: RT cyclic frames, DCP discovery, connection setup, alarm frames, LLDP topology checks, and cycle-time troubleshooting.
Modbus Register Map Explained: How to Read Any Device
Modbus register map reading made reliable: the four register types, the zero-based offset trap, data types inside registers, byte order, and scale factors.
Modbus TCP S7-1200: TIA Portal Step-by-Step Guide
Modbus TCP S7-1200 configuration in TIA Portal: MB_SERVER and MB_CLIENT setup, holding register mapping, connection parameters, and reading multiple devices.
SCADA Security: Complete Guide to Protecting Control Systems
Learn how to secure SCADA systems from cyber threats. Covers network segmentation, remote access, IEC 62443 zones, real attacks, and a practical checklist.
Modbus Function Codes Explained with Real Examples
Modbus function codes with real hex frames: FC 01 to 06, FC 15 and 16, FC 23 and 43, plus register type matching and the mistakes that cause exceptions.
Modbus Security Risks and How to Protect Your Network
Modbus security risks in practice: why the protocol has no authentication, real attack techniques on RTU and TCP, plus segmentation, firewalls, and monitoring.
How to Configure Modbus RTU Over RS-485: Step-by-Step
Modbus RTU over RS-485 configured step by step: bus wiring and topology, termination and biasing, addressing, register types, and T1.5 and T3.5 timing.
Modbus TCP/IP Setup: Step-by-Step Configuration Guide
Modbus TCP/IP setup from scratch: IP planning, server and client configuration, MBAP header basics, gateway bridging to RTU, and connection troubleshooting.