Product Modification
HART Device Impact
HART EDD Impact
Minor hardware changes to a device
  • Re-Registration is Required
  • New Device Revision required
  • New Hardware Revision required

Refer to SPEC-099 (FCG TS20099), section 6 FIELD DEVICE REVISION RULES.
  • EDD re-registration is required, in addition to Device Re-Registration


Major hardware change to a device
Microprocessor firmware change not related to HART application
  • Re-Registration is not required
  • New Software Revision applies
  • Recommend re-testing using the HART Test System to verify conformance was not impacted. 
  • EDD re-registration is not required
Microprocessor firmware change that could potentially affect HART communications
  • Re-Registration is Required
  • New Device Revision required
  • New Software Revision required
Refer to SPEC-099 (FCG TS20099), section 6 FIELD DEVICE REVISION RULES.
  • EDD re-registration is required, in addition to Device Re-Registration

Change of vendors for components in the product hardware design
  • Re-test the HART FSK Physical Layer 
  • Submit FR20156.2 (HCF_FRM-156.2) to FieldComm Group for audit
  • EDD re-registration is not required

Modify firmware to meet SIL standards
  • New Device Type is required
  • Separate product registration required    
  • New EDD is required
  • New EDD Registration is required
DD Source Code Change:
  • New Variables
  • New Commands
  • Re-Registration is Required
  • New Device Revision required

  • EDD re-registration is required, in addition to Device Re-Registration

DD Source Code Change:
  • New menus, methods, charts, graphs, images only
  • Not Required
  • EDD re-registration is required 

DD Source Code Change:
  • Add enumerations to existing lists
  • Re-Registration is Required
  • New Device Revision required
  • New Software Revision required

  • EDD re-registration is required, in addition to Device Re-Registration