Physical Installation And Configuration - Emerson Rosemount 1066 Instruction Manual

Section 10: haRT Communication
April 2017
10.2

physical Installation and Configuration

10.2.1
HART Wiring and Output Configuration
HART communications is superimposed on Analog Output 1 for all of the measurements and
parameters of the 1066.
10.2.2
HART Multidrop (Bus) Configuration
The HART Polling Address should be left at its default value of "0", unless the 1066 is used in a
Multidrop configuration with up to 14 other transmitters. When the Polling Address is greater than
"0", the 4-20 mA output is held at 4 mA or below, and does not change in response to changes in
the measurement in HART 5.
In HART 7, Loop Current Mode should be set to "Off" to hold the current output to a minimum value.
HART Configuration
10.2.3
To access the HART Configuration screens, select the "HART" menu item in the Main Menu. If
HART 7 is chosen (Univ Cmd Rev = 7), the following controls are available:
FIGuRE 10-1. haRT 7 Configuration Screen: Basic Definitions
• univ Cmd Rev – toggles between HART version 5 and HART version 7. If the HART host being
used can accommodate HART 7, HART 7 should be chosen due to its larger feature set. If the
host can only use HART 5, then HART 5 must be chosen.
Note: If the 1066 is connected to a HART host and the HART version is changed, the host will
likely detect the transmitter as a new transmitter with a different device revision number.
• polling address – Choose "0" unless Multidrop is being used. If Multidrop is being used, each
transmitter should have its own polling address of from 1 to 15.
• loop current mode – Set Output 1 current to a minimum value for multidrop applications
(HART 7 only).
• Find Device Cmd – Setting Find Device to "On", enables the 1066 to be identified by the host.
The transmitter returns identity information including device type, revision level, and device
ID (HART 7 only).
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Instruction Manual
LIQ-MAN-1066
HART Communications