Talk to controllers
directly.

The LINK SDK family complements our OPC UA portfolio for cases where you work not with an open standard but with a specific controller or transport protocol — directly, without middleware.

SDKs at a glance Book a consultation

4.8/5 on Trustpilot · 224 reviews

95,000+

LINK SDK downloads

4,000+

Customers worldwide

2014

In production use since

€0

Runtime fees

Which LINK SDK fits?

Three scenarios — three answers.

Every LINK SDK addresses a different integration case. Find the right one
in 10 seconds.

“I need data from the S7.”

Read and write data blocks, flags and I/O – over TCP/IP, with no extra software on the controller. For .NET, COM and MATLAB.

TLX-S LINK SDKs

“I need NC data from the 840D.”

Axis positions, R parameters, tool data and alarms – live from the CNC. Four tiers up to Production Pro.

TNX-S LINK SDKs

“I need an open transport protocol.”

RFC 1006 (ISO-on-TCP) for vendor-independent raw data exchange. Client & server in a single SDK.

TR1K6 LINK SDKs

The LINK family

Three SDKs. One API design principle.

All LINK SDKs follow the same philosophy: less protocol, more business logic. Royalty-free, with free evaluation and direct developer support.

Direct PLC access

TLX-S LINK SDKs

Direct access to data blocks, flags and inputs/outputs of S7 controllers over TCP/IP. No additional software on the controller. Three language variants for maximum flexibility.

Client .NET · COM · MATLAB 56,000+ downloads S7-200 to S7-1500 · LOGO!

Discover the TLX-S LINK SDKs

CNC data integration

TNX-S LINK SDK

NC data live from the 840D — axis positions, R parameters, GUD variables, tool data and alarms. Four tiers from basic access to Production Pro.

Client .NET 39,000+ downloads 4 tiers 840D SL & PL · One

Discover the TNX-S LINK SDKs

Transport protocol

TR1K6 LINK SDK

Client and server development over RFC 1006 (ISO-on-TCP). Vendor-independent raw data exchange — your own telegrams, your own data structures.

Client & Server .NET ISO-on-TCP Vendor-independent

Discover the TR1K6 LINK SDKs

Customer voice

„We've been using the IP-S7-Link for many years and are thoroughly satisfied with this interface. Every Windows upgrade in the past went off without a single problem."

— Trustpilot review, Verified customer · 4.8 / 5 stars from 224 reviews

What the family shares

Three SDKs, one DNA.

All LINK SDKs follow the same design principles. What you learn once applies to the whole family.

Direct TCP/IP

No OPC server, no HMI, no middleware. Straight from your application code to the controller.

No additional license

No additional licensing package from the controller vendor. One LINK license is all you need.

One API philosophy

Know one LINK SDK, know all three. The same concepts for connecting, reading and writing — regardless of the target protocol.

Industrial-grade reliability

Auto-reconnect, connection pooling, 24/7 operation. In production use for more than 10 years.

„Some projects need a platform, others need a library inside their own code. LINK is built for the latter: your application talks directly to the controller — whether it's an S7, an 840D or a telegram of your own."

Dominik Scharnagl CEO & CTO, Traeger GmbH