ABB DHH805-A, Operating Instruction

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Handheld communicator Model DHH805-A | OI/DHH805-EN Rev. D 19
7 HART
®
Communication
7.5 HART
®
Communication / Online Mode
After power up, DHH805-A automatically detects if a field
device is connected and attempts to establish HART
communications; this is the factory default “Auto” poll function.
When a device with address zero is found, the handheld
terminal provides feedback to the user and starts the initial
HART display for the connected device. See an example of
Online Mode below.
After polling, when no device connection is detected the
DHH805-A shows an information screen (see figure 15).
Figure 15: Device found
7.6 Multidrop Poll (addresses 1 – 63)
To initiate a Multidrop Poll, select “Settings > Polling > Method
Edit”. DHH805-A can poll different address ranges: address 0,
addresses from 1 to 15 (HART 5), addresses from 1 to 63
(HART 6 and HART 7), or a customized range (as shown in
figure 16). As mentioned in paragraph 6.5.1, default polling
address is 0.
Figure 16: No device within the address range
After selecting the desired address range to be polled,
DHH805-A shows the list of all devices within that range sorted
by tag (see figure 17).
7.7 Offline menu mode
After accessing offline mode from the communications menu,
the Offline Menu allows the user to review DHH805-A stored
device configuration list on the 8 Gb SD card. Configurations
are sorted by manufacturer, device type, DD and device
revision as well as to perform some functions on the selected
DD. These operations are described here below.
Figure 17: Polling options
Figure 18: Device list after a multidrop polling
Figure 19: Offline menu. Mandatory selection
Figure 20: DD List on SD Card sorted by manufacturer
Figure 21: Device type
Figure 22: Saved DD files