New Data Type (Time) for Time Stamping of Device Variable Values in Universal Command 9 response. The Device Profile uses enumerations from the Common Tables. The Private Label code in command 0 will be set to the manufacturer ID if the manufacturer and distributor are the same. Command 15 now returns value 250 in place of the private label code. The expanded device type will be the 8-bit manufacturer ID and the device type assigned according to the rules of HCF-99.Ĭommand 0 now contains the private label code and the device profile in addition to the other changes outlined above. Previous addendums to the Data Link Layer Specification, Command Summary Specification and Universal Command Specification that are proven and already in use have been incorporated into the HART 7 revision of the HART Protocol Specifications.Ĩ-bit manufacturer IDs will be padded with 0 for the MSB. Resolution requires the expansion of Manufacturer ID Codes from 8-bits to 16-bits. Widespread growth and adoption of the HART Protocol has resulted in the available code space for 8-bit Manufacturer ID Codes being exhausted. Required changes moving from HART 6 to HART 7 without Burst Mode Protects the integrity of plant configuration databases. Improved mechanism for master applications to determine that a field device configuration has been changed.

Configuration Change Counter – Required.

The specifications currently reflect the length of this tag to be 32 characters as outlined in the Long Tag proposal approved by HCF members in January 1998. This new Long Tag with international (ISO Latin 1) characters allows the consistent implementation of the longer tag names required by many industry users. Enables field devices to self-validate and report on the quality of the data in the command response (good, poor, bad, fixed) plus more. One byte of well-defined status for each Device Variable returned by new cyclic data access Command 9. Provides additional device status alerts such as “ Device Needs Maintenance” plus more. This new Extended Device Status byte is in addition to the current device status byte returned with each command response. One additional byte of well-defined status information with Command 0 and new cyclic data access Command 9. A key enabler for many HART 6 improvements, this mechanism provides master applications with considerable information about device capabilities. Provides master applications with a simple mechanism to determine the number and type of process-related variables (pressure, temperature, etc.) that are available within a device.

Device Variable Classification - Required.

Required changes moving from HART 5 to HART 6 without Burst Mode Solution home Development Procedures Field Device Development HART 5 – 7 Comparisons

Hart tri-loop configuration software