KEYENCE KV COM+ Library 1.4

KEYENCE KV COM+ Library by KEYENCE Corporation

The KEYENCE KV COM+ Library is a Windows COM/ActiveX automation library designed to simplify communication between PC applications and KEYENCE KV-series programmable logic controllers (PLCs). It provides a straightforward, high-level API for establishing connections and exchanging data with KV PLCs, allowing developers to build monitoring, control, and data-collection solutions without implementing low-level protocols.

Key features:

• COM automation interface for easy integration with languages and tools that support COM (for example, VB/VBA, C++/MFC, C#/VB.NET via interop, and common scripting environments)
• Simple methods to connect to compatible KV-series PLCs over supported interfaces (such as Ethernet or serial/USB, depending on PLC options)
• Read and write access to PLC devices and memory areas (for example, I/O, coils/contacts, data registers, timers, and counters)
• Support for common operations such as status monitoring and batch reads/writes
• Clear error reporting through standard COM return codes to aid diagnostics and recovery
• Documentation and example code to accelerate development and integration

Typical use cases:

• Building PC-based HMIs, dashboards, or maintenance tools
• Integrating KV PLCs with MES/SCADA or data historians for logging and analytics
• Automating test, inspection, and production equipment
• Rapid prototyping of machine control and supervisory functions

Benefits:

• Reduces development time by abstracting communication details
• Enables reuse across multiple projects and development environments
• Backed by KEYENCE’s PLC expertise and ecosystem

System considerations:

• Requires a supported Windows environment with COM capability
• Requires a compatible KEYENCE KV-series PLC and appropriate communication interface/module
• Licensing, supported OS versions, and detailed feature support may vary; consult KEYENCE documentation or your local KEYENCE representative for specifics

KEYENCE KV COM+ Library is developed by KEYENCE Corporation. The most popular versions of this product among our users are: 1.0, 1.1, 1.2, 1.3 and 1.4.

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