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 1-63. After the mode is enabled, the
analog output of each device is fixed and no longer
represents any variable.
NOTE
Communication errors, such as a device appearing at
multiple addresses, can occur when you poll addresses
greater than 15 on a loop with both HART revision 5 or
earlier and HART revision 6 or 7 devices.
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 Options. Select one of the
following polling options:
• Poll by Address - Lets you poll for devices at the
addresses listed in the Polling Addresses menu
option. The Polling Addresses menu appears on
the Configure HART Application screen only when
Poll by Address is selected. Select one of the
following options from the Polling Addresses menu:
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