{"id":24,"date":"2026-11-01T20:32:55","date_gmt":"2026-11-01T12:32:55","guid":{"rendered":"https:\/\/readcell.com\/blog\/?p=24"},"modified":"2026-11-01T20:32:56","modified_gmt":"2026-11-01T12:32:56","slug":"profinet-vs-ethernet-ip-vs-modbus-tcp-barcode-reader","status":"publish","type":"post","link":"https:\/\/readcell.com\/blog\/profinet-vs-ethernet-ip-vs-modbus-tcp-barcode-reader\/","title":{"rendered":"PROFINET vs EtherNet\/IP vs Modbus TCP Barcode Readers: Which PLC Connection Fits Your Line?"},"content":{"rendered":"

Plant engineering managers, controls integrators, and procurement teams in electronics, packaging, automotive, and general manufacturing can use this comparison when a new barcode reader must connect to an existing PLC network. The PROFINET vs EtherNet\/IP vs Modbus TCP barcode reader<\/strong> decision affects more than the communication label: it can shape PLC configuration, data handling, diagnostics, commissioning work, and the number of devices that can access the reader. Short answer: use the protocol your PLC network already runs. Siemens lines usually mean PROFINET, Omron and other EtherNet\/IP lines mean EtherNet\/IP, and Modbus TCP suits any PLC with a Modbus TCP client. ReadCell VS110R, VS210 and VS600E support all three.<\/p>\n

Protocol fit for PLC-connected barcode readers<\/h2>\n

See the PROFINET technology overview<\/a> and ODVA's EtherNet\/IP overview<\/a> for protocol background.<\/p>\n

\n\n\n\n\n\n\n\n
Comparison dimension<\/th>\nPROFINET<\/th>\nEtherNet\/IP<\/th>\nModbus TCP<\/th>\n<\/tr>\n
Communication model<\/td>\nCyclic industrial Ethernet I\/O with device diagnostics<\/td>\nImplicit and explicit industrial Ethernet messaging<\/td>\nClient\/server transactions using mapped registers<\/td>\n<\/tr>\n
Typical PLC fit<\/td>\nSiemens lines; ReadCell has an S7-1200 \/ TIA Portal example<\/td>\nOmron and other EtherNet\/IP lines; ReadCell has an NX1P2 \/ Sysmac Studio example<\/td>\nAny PLC with a Modbus TCP client<\/td>\n<\/tr>\n
Integration material<\/td>\nGSDML device description files<\/td>\nEDS device description files<\/td>\nRegister and block mapping<\/td>\n<\/tr>\n
Concurrent master access<\/td>\n\u2014<\/td>\n\u2014<\/td>\nOne Modbus TCP master per reader<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/figure>\n

Native Protocol Support by Reader Type<\/h2>\n

Native support for all three protocols is limited to three fixed-mount models: ReadCell VS110R, ReadCell VS210 and ReadCell VS600E. ReadCell VS95 and ReadCell VS90 are fixed-mount readers too, but they do not support these PLC protocols, so check the model before writing it into a PLC network design. The fixed-mount reader range<\/a> lists them side by side, and the protocol integration information<\/a> shows each model's interfaces.<\/p>\n

Match the Protocol to Your PLC Network<\/h2>\n

Start with the PLC platform and the network already used on the line. A matching native protocol usually gives the clearest path for reader-to-PLC communication, while a different protocol may require a separate connection plan. Select the protocol that matches the PLC network already installed, rather than choosing a reader first and solving the PLC connection later.<\/p>\n

A mixed connection environment may need more than the standard industrial Ethernet choices. ReadCell VS110R also supports Mitsubishi MC protocol and Modbus RTU, making it the listed option with these added interfaces. The Ethernet version of ReadCell VS320-DPE is another choice for a handheld installation, with PROFINET, EtherNet\/IP, and Modbus support.<\/p>\n

Not every ReadCell model uses the PLC protocols in the comparison. ReadCell VS95 has none of these PLC protocols and connects through a TCP\/IP socket over Ethernet or RS232C. The ReadCell VS90 compact reader, the ReadCell VS80 embedded module, and the other handhelds connect over RS232 or USB. These models may fit a line whose control architecture already uses those connection methods, but they should not be treated as native PROFINET, EtherNet\/IP, or Modbus TCP readers.<\/p>\n

For procurement and integration records, the certification boundary matters: ReadCell supports PROFINET and EtherNet\/IP, but ReadCell does not claim conformance certification. Confirm the PLC platform, the active factory network, and any required legacy interface before selecting the reader model.<\/p>\n

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Data Blocks, Files, and PLC Setup Materials<\/h2>\n

All supported protocols use the same three data blocks: control<\/strong>, status<\/strong>, and decode results<\/strong>. This shared structure gives the PLC program a consistent place for commands, operating feedback, and decoded barcode data, regardless of the selected connection method.<\/p>\n

For a triggered Modbus TCP read, the PLC polls the three blocks in turn. The program uses one MB_CLIENT call for each block. In continuous mode, only the decode-results block is needed. This distinction matters during PLC planning because the trigger method changes the required read sequence and program structure.<\/p>\n

For device description and project work, PROFINET integration can start with the PROFINET PLC integration details<\/a>. The available supporting files include PROFINET GSDML files and EtherNet\/IP EDS files. Siemens and Omron PLC example projects are also available, along with IDManager or ScanSet configuration software, depending on the model. These materials are sent by email on request rather than provided as direct website downloads.<\/p>\n

The initial technical review does not require an account. Datasheets for all 14 models are available as PDF files from the Downloads page<\/a>. Use the datasheets to check the exact model documentation before requesting project files or software, since the applicable configuration tool depends on the reader model.<\/p>\n

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Illustration: ReadCell VS110R above a PCB conveyor<\/figcaption><\/figure>\n

Plan Around Single-Master Modbus TCP Access<\/h2>\n

One ReadCell reader accepts one Modbus TCP master connection at a time. If a PLC is using that connection as the Modbus TCP master, a second PLC, HMI, or PC cannot connect to the same reader alongside it. This is a connection-concurrency limit, not a question of how many devices are present on the wider Ethernet network.<\/p>\n

Before selecting the reader and PLC interface, document the intended ownership of the connection. If the reader will serve one PLC only, the single-master arrangement may fit the line design. If operators, an HMI, or a PC also need direct access to the reader, do not assume they can share that Modbus TCP connection. Record those access requirements early and define a separate system architecture for them, rather than treating one reader as a direct endpoint for multiple PLC, HMI, and PC connections. This check belongs in the network design and purchasing specification, before hardware quantities and interface responsibilities are finalized.<\/p>\n

Prepare the Details for a Reader Recommendation<\/h2>\n

Before requesting a reader recommendation, gather the application details in one place. The most useful submission starts with the actual part and the PLC planned for the line, rather than a general description of the project.<\/p>\n