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EN
NOTE
The transmitter is set to address 0 at the factory, allowing it to operate in the
standard point-to-point manner with a 4–20 mA output signal. To activate multidrop
communication, you must change the transmitter address to a number from 1 to 15.
This change deactivates the 4–20 mA analog output, locking it to 4 mA. It also
disables the failure mode alarm signal, which is controlled by the upscale/downscale
jumper position.
Changing a Transmitter Address
To change the address of a multidropped transmitter, follow these fast key
sequences. To activate multidrop communication, the transmitter address must be
changed to a number from 1 to 15.
Polling a Multidropped Loop
Polling a multidropped loop determines the model, address, and number of
transmitters on the given loop.
NOTE
The Model HC275 HART Communicator requires you to use the Utility Menu to
perform an auto poll. This menu is available from the Main Menu of the HART
Communicator. Press the left arrow to move from the Online Menu to the Main
Menu. Press 4 from the Main Menu to access the Utility Menu. The HART
Communicator will only recognize transmitters with an address of “0” unless polling
is initiated.
HART Fast Keys
1, 4, 3, 4, 1
HART Fast Keys
Left Arrow, 1, 1,
4690.bk : 4690.s2 Page 14 Tuesday, May 26, 1998 5:28 PM