Configuring The Hart Application; Changing The Hart Polling Option - Emerson 375 User Manual

HART Functionality
CONFIGURING
THE HART
APPLICATION
Changing the
HART Polling
option
Use the HART polling option to configure your 375 Field
Communicator to automatically search for all or specific
connected devices. Most HART device installations contain
one device per loop and the device address is zero.
To have more than one device per loop, wire the devices
in parallel and place into "Multidrop" mode. This mode is
enabled by changing the address from zero to any
address between 1-15. After the mode is enabled, the
analog output of each device is fixed and no longer
represents any variable.
To change the polling option:
1. From the HART application main menu, double-tap
Utility.
2. Double-tap Configure HART Application.
3. Double-tap Polling.
4. Select one of the following polling options:
• Never Poll - Connects to a device at address 0 and if
not found, it will not poll.
• Ask Before Polling - Connects to a device at address
0 and if not found, you will be asked if you want the
communicator to poll for devices at addresses 1-15.
• Always Poll - Connects to a device at address 0 and
if not found, the communicator will automatically poll
for devices at addresses 1-15.
• Digital Poll - Polls addresses 0-15, regardless if a
device is found at address 0. To find individual device
addresses, use this option to find each connected
device in the loop and list them by tag number.
• Poll Using Tag - Lets you enter the tag of the device.
You will be prompted to enter a tag name upon
starting the HART application.
• Poll Using Long Tag - Lets you enter the long tag of
the device. You will be prompted to enter a tag name
upon starting the HART application. (Only supported
in HART Universal revision 6 devices.) Double-tap
when the tag is truncated to display the full tag.
5.Tap Enter.
Refer to your device-specific manual for information
about changing a device polling address.
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