Member Comments Requested
HART Test Specifications

Comments due by October 29, 2020
FieldComm Group has posted the core HART Test Specifications (Token-Passing Data Link Layer, Universal Command and Common Practice Command Test Specifications) for member review and comment.

The three specifications were reviewed by the HART Technology Working Group at the June 2020 WG meeting with a goal to make improvements. The majority of the improvements made were mainly clarifications and minor corrections. The Working Group recommended to issue a maintenance release of these Test Specifications.
 For more details, please see the HART Technology WG meeting minutes posted on FCG Workspace: Communities > HART Technology > Workspace > Documents > Meeting Minutes > Minutes of Meeting 2020-06-22
Prior to its official release, FieldComm Group members are provided the opportunity to review the test specifications and are being asked to submit comments. The deadline for comment submission is October 29, 2020. The test specifications will be released once the comments are resolved and changes finalized.
Summary of Changes
The improvements to the specification are marked in blue within each document, with change bars. Highlights of the improvements include:
  • Token-Passing Data-Link Layer: this test specification has refactored DLL032, DLL034 and DLL038. The test requirements are now partitioned between Data-Link and Application Layer.  Only the Data-Link specific test requirements remain in this test specification.
  • Universal Command: UAL004, UAL014 and UAL015 were added as the result of the refactoring of the Token-Passing Data-Link Layer test cases.
  • Common Practice Command: only minor clarifications and corrections were made, principally to the Common Practice burst-mode test cases.
See the Preface and Revision History in the individual documents for more information.

Review Process

1. How to get started 
Documents are available for review and comment on FieldComm Group Workspace. Accounts are freely available to member companies. 
Visit and Sign In. If you do not have an account, select New User/Register Now to create an account. Each account must be validated so please allow up to one business day for activation. You will receive an email when your account is activated. All emails from FieldComm Group Workspace emails originate from Please consider adding this address to your safe senders list so that messages are not flagged as junk mail.

2. Access the Documents for Review
All document reviews are conducted in the Working Group community on Workspace. By default, all members are added to this community within 24 hours of a new approval. However, if you are not part of this community, you will see a JOIN button. Simply click the JOIN button, complete the form and you will have immediate access. You will need to join this community otherwise the document links will not work. The updated Test Specifications are posted on the FCG Workspace: Communities > Working Groups (start here) > Workspace > Documents > Member Review (Active) > MC-005 HART Test Specifications
3. Submit Your Comments
Comments are submitted at the same location you access the documents above. Use the drop down menu next to “Download” to submit your comments. For an overview on how to submit comments, visit our support article. Bulk comment submission is also possible. 
Have questions? Please contact us at 
FieldComm Group Spec Team
Submit Comments Now
Copyright © 2020 FieldComm Group, All rights reserved.