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Reference Manual
00809-0100-4840, Rev CB
Appendix F: Programming the 3102 and 3105 using HART
February 2015
Programming the 3102 and 3105 using HART
F.4.24 Preambles (D964)
This is read by a HART Master Device e.g. a Rosemount 3490 Series Control Unit to determine
how many preamble bytes are to be sent with each HART protocol message.
Field Communicator or AMS Device Manager
To view the number of preamble bytes
1. From the Home screen, select 2: Configure.
2. Select 2: Manual Setup.
3. Select 4: HART/Identity (3105) or
5: HART/Identity (3102).
4. Select 2: Communication.
5. Select 2: Preambles D964.
6. When finished, select EXIT to exit to the previous menu.
Rosemount 3490 Series Control Unit
To view the number of preamble bytes
1. From the Main Menu screen, select SETUP.
2. Select the transmitter (e.g. “Tx1: 3102”).
3. Select SYSTEM.
4. Select FIXED.
5. Select HART.
6. Select Num Req Preams.
7. When finished, use the ESC key to exit to the previous menu.
Fast Keys
2, 2, 4 [or 5], 2, 2
Preambles D964
5
EXIT
HELP
(Field Communicator Screen Shown)
Num Req Preams D964
5
(Rosemount 3491 Screen Shown)