ATI Series D12 Toxic Gas Transmitter with H10 Smart Sensor
Revision N (7/15) 70
Poll_Addr
The Poll_Addr variable sets the polling address of the transmitter. The default value
is 0, which allows the transmitter to communicate digitally, while preserving the
function of the 4-20mA output. The value may be set from 1 to 15, which fixes the
output at 4mA, and disables analog signaling.
Dev_Id
The Dev_Id variable is used to form a unique identifier in the HART long frame
address. This value is set at the factory, and appears on a label attached to the
transmitter. Changing this setting is not recommended.
Loop
The Loop variable specifies the operation of the 4-20mA output. When the HART
polling address is 0, the value is NOT_FIX and loop functions as normal. When the
address is set to 1 or higher, the value is FIXED and the output is fixed at 4mA. The
ability to alter this behavior is reserved for future use, and changing this setting is not
recommended.
Fixed_mA
The Fixed_mA variable provides direct access the associated HART network
management variable. The value is adjustable only when the Loop variable is
FIXED, and may be adjusted between 3.5 and 22 mA.
Resp_Preamb
The Resp_Pream variable provides direct access to the associated HART network
management variable, which determines the number of preamble characters (FF
hex) transmitted at the beginning of each message. The default value is 5, and may
be set from 3 to 20. Changing this setting is not recommended.
Find-Me
The Find-Me function places the transmitter into the Find-Me mode, where a master
device can issue a command to positively identify the physical location of the
transmitter.
Selecting the Find-Me function presents the special page that remains until the master device issues a
“Find-Me” command to the transmitter, at which point the display changes to the “Device Found” page.
Figure 73. Hart a) Find-me and b) Device found pages
FIND ME ARMED
ESC Key to exit
a) Find Me Page
DEVICE FOUND
ESC Key to exit
b) Device Found Page
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