Hart ® Communications; Initial Screens / Online Mode - ABB DHH800-MFC Operation Manual

MOBILITY DHH800-MFC CONFIGURATOR INSTRUCTION MANUAL
When connecting the Mobility DHH800-MFC to a loop with a resistive load greater than 250 Ωs, the HART
jacks may be connected across the loop + and – or to the HART device communication terminals. Refer to
Figure 7-3 for connecting across the loop + and -.
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7.4 HART Communications

7.4.1 Initial Screens / Online Mode

Upon power up the Mobility MFC automatically detects if a field device is connect and attempts to establish
HART communications. When a device with address zero is found, the Mobility MFC provides feedback to
the user and starts the initial HART display for the connected device. See an example of Online Mode in
Figure 7-4.
7-2
Figure 7-2 Low-Load Loops
Figure 7.3 Connecting to the Mobility MFC
communication terminals, R Loop > 250 OHMS
Online
2600 T-262/264 : PT-1012D
1 Configure
2 Pres: 3.523 inH2O@20C
8 Sensor temp: 74.04 degF
9 Static Pres: 14.50 psi
10 Free Variable: 100.01 ft
11 Analog Output: 4.8 mA
12 PV% range: 5.50%
Up Down
Figure 7-4 Online HART Screen
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