Wiznet makers

Overview

Lingkong LK3U and ZK3U are FX3U-compatible PLC families whose user manual exposes W5500 directly in the Ethernet register and fault-code interface. The evidence is not only a marketing phrase: M8404 reports W5500 reset readiness, D8413 is assigned to W5500 program version, and error codes 6392 and 6394 identify W5500-related Ethernet failures.

Generated compact overview: the LK3U/ZK3U PLC families use a W5500-backed ENET path for Ethernet programming and Modbus TCP functions.

Lingkong describes itself as an industrial automation company based in Huizhou, China, focused on cost-effective PLC products and expansion modules. The LK3U/ZK3U manual is machine-translated from Chinese to English, so this article uses it as technical evidence but avoids over-interpreting wording that may come from translation.

System Configuration

The LK3U/ZK3U line includes shell-type and panel-type PLC models with 14, 20, 32, 48, and 64 I/O options. The manual describes DC 24 V operation, built-in RS232 and RS485 ports, CAN expansion, analog I/O, 32,000 step capacity, and compatibility with GX Works2-style FX3U programming workflows.

System Architecture and Data Flow

The Ethernet section describes eight independent ports, default MELSOFT connection channels, a Modbus TCP server channel, SNTP support, and Modbus TCP/UDP client behavior. The PLC can be searched from GX Works2 over Ethernet, while the W5500-related special relays and D registers expose the Ethernet adapter state to troubleshooting and ladder-program logic.

Generated technical diagram: W5500-backed ENET connects the PLC runtime to Modbus TCP, SNTP, and GX Works2 Ethernet access.

Manual Evidence for W5500

Manual excerpt: the M8404 relay indicates normal W5500 reset and readiness in the Ethernet register map.

Manual excerpt: the fault table includes W5500 timeout and disturbance errors for Ethernet troubleshooting.

Role of the WIZnet Chip

W5500 is the wired Ethernet controller exposed by the LK3U/ZK3U ENET function. Its role is visible through maintenance objects rather than source code: reset readiness, program version, Ethernet connection state, destination IP/port registers, and fault codes all refer to the W5500-backed adapter path. For WIZnet, that makes the manual a useful commercial PLC adoption example.

Product Family and Availability

LK3U is presented as a shell-type PLC line and ZK3U as a panel-type line, with multiple I/O counts across each family. The public Lingkong store and manual do not show a stable MSRP for every configuration, so availability should be treated as vendor or reseller dependent. The important product-family point is that Ethernet is part of the FX3U-compatible control environment rather than a separate maker add-on.

Where It Fits

This product family fits small-machine control, factory retrofit, and training environments where Mitsubishi FX3U compatibility and Ethernet programming are useful. It also links W5500 to real PLC maintenance workflows: if Ethernet does not work, the user manual points technicians to W5500 reset, timeout, and disturbance fault evidence. The limit is that no schematic or firmware source is public.

Related WIZnet Maker Projects

• FX3U-32MT-6AD-2DA with w5500 is related because it is another FX3U-compatible W5500 PLC product-family case.
• AMX-FX3U-26M series PLC controller is related through W5500, FX3U compatibility, RJ45 Ethernet, and Modbus support.
• STM32 + W5500 Modbus TCP Server is related as a firmware-level Modbus TCP reference for what these PLCs expose as finished product behavior.

FAQ

Q. What proves that LK3U/ZK3U uses W5500? The manual lists W5500 reset readiness, W5500 program version, and W5500-specific Ethernet fault codes in the ENET register and troubleshooting sections.

Q. Is LK3U/ZK3U a PLC product or a maker project? It is a commercial PLC product family, so this Maker entry should be treated as a VAR adoption case.

Q. Which protocols are relevant? The Ethernet section covers MELSOFT access, Modbus TCP/UDP server and client behavior, SNTP, and GX Works2 Ethernet search workflows.

Q. Does the manual show source code? No. The evidence is from user-facing registers, features, and fault-code tables rather than firmware source.

Q. Why is this useful for WIZnet? It shows W5500 appearing in a PLC product line where Ethernet troubleshooting and industrial protocol compatibility are part of normal user documentation.

The source manual, official vendor pages, WIZnet W5500 product page, and related Maker references are attached in the Documents panel.

한국어 (Korean)

개요

Lingkong LK3U/ZK3U는 FX3U 호환 PLC 제품군이며, 사용자 매뉴얼에는 W5500이 Ethernet register와 fault-code 인터페이스에 직접 드러납니다. M8404는 W5500 reset readiness, D8413은 W5500 program version, 6392와 6394는 W5500 관련 Ethernet fault로 설명됩니다.

생성 개요 이미지: the LK3U/ZK3U PLC families use a W5500-backed ENET path for Ethernet programming and Modbus TCP functions.

Lingkong은 중국 Huizhou 기반의 산업 자동화 회사로, 비용 효율적인 PLC와 확장 모듈을 제공한다고 설명합니다. 이 매뉴얼은 중국어 원문을 영어로 기계 번역한 문서이므로, 글에서는 확인 가능한 기술 항목만 근거로 사용했습니다.

시스템 구성

LK3U/ZK3U 제품군은 14, 20, 32, 48, 64 I/O 옵션의 shell-type 및 panel-type PLC를 포함합니다. 매뉴얼은 DC 24 V, RS232, RS485, CAN 확장, 아날로그 I/O, 32,000 step, GX Works2 계열 FX3U 프로그래밍 흐름을 설명합니다.

시스템 아키텍처와 데이터 흐름

Ethernet 섹션은 8개 독립 포트, 기본 MELSOFT 연결, Modbus TCP 서버 채널, SNTP, Modbus TCP/UDP client 동작을 설명합니다. GX Works2에서 Ethernet으로 PLC를 검색할 수 있고, W5500 관련 M/D register는 Ethernet adapter 상태와 troubleshooting에 쓰입니다.

생성 기술 다이어그램: W5500-backed ENET connects the PLC runtime to Modbus TCP, SNTP, and GX Works2 Ethernet access.

W5500 근거

매뉴얼 발췌 이미지: the M8404 relay indicates normal W5500 reset and readiness in the Ethernet register map.

매뉴얼 발췌 이미지: the fault table includes W5500 timeout and disturbance errors for Ethernet troubleshooting.

WIZnet 칩의 역할

W5500은 LK3U/ZK3U ENET 기능의 유선 Ethernet controller로 드러납니다. reset readiness, program version, connection state, destination IP/port register, fault code가 W5500 경로를 보여주므로 상용 PLC 채택 사례로 의미가 있습니다.

제품군과 구매 가능성

LK3U는 shell-type, ZK3U는 panel-type PLC 라인으로 보이며 여러 I/O 수량을 제공합니다. 공식 매뉴얼과 스토어에서 모든 구성의 고정 MSRP는 확인되지 않아 가격은 판매처와 구성에 따라 달라질 수 있습니다.

적용 위치

이 제품군은 소형 장비 제어, 공장 retrofit, FX3U 호환 교육 환경에 적합합니다. W5500은 Ethernet 기능뿐 아니라 현장 troubleshooting에서 reset, timeout, disturbance fault로 노출된다는 점이 중요합니다.

관련 WIZnet Maker 프로젝트

• FX3U-32MT-6AD-2DA with w5500는 FX3U 호환 W5500 PLC 제품군이라는 점에서 직접 관련됩니다.
• AMX-FX3U-26M series PLC controller는 W5500, FX3U 호환성, RJ45 Ethernet, Modbus 지원이 겹칩니다.
• STM32 + W5500 Modbus TCP Server는 firmware 레벨의 Modbus TCP 참고 사례입니다.

FAQ

LK3U/ZK3U가 W5500을 쓴다는 근거는 무엇인가요? - 매뉴얼의 ENET register와 fault code 섹션에 W5500 reset, W5500 program version, W5500 관련 Ethernet fault가 나옵니다.

이건 maker 프로젝트인가요? - 아닙니다. 상용 PLC 제품군이므로 VAR 채택 사례로 보는 것이 맞습니다.

관련 프로토콜은 무엇인가요? - MELSOFT 접속, Modbus TCP/UDP 서버와 클라이언트, SNTP, GX Works2 Ethernet 검색 흐름이 관련됩니다.

소스 코드가 있나요? - 없습니다. 사용자 매뉴얼의 register, 기능, fault code 근거로만 설명합니다.

WIZnet 관점에서 왜 유용한가요? - W5500이 PLC 제품군의 일반 사용자 문서와 troubleshooting 항목에 드러나는 상용 채택 사례이기 때문입니다.

원본 매뉴얼, 공식 벤더 페이지, WIZnet W5500 제품 페이지, 관련 Maker 참고 글은 Documents 패널에 첨부했습니다.