The Fieldbus Foundation ( released its enhanced H1 Interoperability Test Kit (ITK) 5.1. The test kit has been updated from previous versions to support Temperature Transducer Blocks, Device Description (DD) 5.1 functionality, and Field Diagnostics Profiles for improved organization and integration of device diagnostics within FOUNDATION fieldbus systems.

The test kit is designed to verify the functionality of an H1 (31.25 kbit/s) device and its conformity with the FOUNDATION fieldbus Function Block and Transducer Block specifications. A tool for troubleshooting and debugging devices, the test kit includes hardware and software required to ensure a manufacturer”s complete device interoperability as specified by the foundation”s official registration testing procedure.

By using the H1 ITK 5.1, device developers can run tests identical to those used by the Fieldbus Foundation before submitting their device for official registration. Enhancements include a Cross-block Device Description, National Instruments (NI) Communication Driver 3.2.2, and updated DD Viewer. Other updates include support for the FF-904 Temperature Transducer Block Specification (single and dual sensor) and FF-912 Field Diagnostics Profile Specification. The kit also provides a Resource Block parameter set to implement the Field Diagnostics Profile, as well as various other software enhancements.

Developed by the Fraunhofer Institute (, the Fieldbus Foundation”s ITK testing tool consists of a test engine, communication stack and Function Block interface card. The ITK test engine executes a set of over 400 test cases that exercise the device implementation. The tester also includes a DD “Super Viewer” that allows examination and verification of a device”s DD, and a conformance test procedure for the Physical Layer. The DD Super Viewer was been enhanced to support validation of existing DDs and the new DD 5.1 format. Device developers can walk their DD, execute methods and render the new visualization elements supported by the new DD 5.1 technology. As additional standard Function Blocks become available, the ITK will be upgraded with new test cases to verify these expanded implementations.

The interoperability test suite can be paired with an ITK Automation Tool designed to eliminate several manual intervention steps required when performing pre-registration testing of fieldbus devices.

In order for a device to pass interoperability testing, it must contain a Fieldbus Foundation-registered communication “stack” that has passed conformance tests.

For more information about the H1 ITK 5.1 test kit, contact Talon Petty at 512 794-8890, ext. 21 or