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ATI
Model F12/D Gas Transmitter
Part 4
– Operation
66
O&M Manual (Rev-H)
Figure 88. Adjust 20mA Menu
4.11 COM Menus and Settings
The transmitter supports ASCII, HART, and Modbus communications, which are configured through the
COM Menu below.
COM Menu
The is COM Menu used to configure the protocol and connection settings of the serial COM interface, and
varies slightly, depending on the factory configured protocol.
Figure 89. COM Menu
Item
Select to …
DAC Count
Scroll the DAC (digital-to-analog converter) count up to increase
or down to decrease the analog output to 20.0mA.
Note
The displayed value is “as left” by the previous adjustment.
When selected, however, the DAC count changes to the factory
calibrated value of 20.0mA. This is to help prevent adjustment
errors caused by 4-20mA receivers that limit readings to 20mA.
Item
Select to …
Setup
Configure the connection settings (only selection when Protocol
is None).
Print the data log (appears only when the Protocol is ASCII, see
Data Log Print Menu on pg 63). Note that the transmitter must
have an RS232 or RS485 interface.
HART
Configure the HART protocol settings (appears only when
Protocol is HART). Note that the transmitter must have a HART
FSK modem interface, and be ordered with the HART FSK stack
option.
Modbus
Configure the Modbus protocol settings (appears only when
Protocol is Modbus). Note that the transmitter must have an
RS232 or RS485 interface, and be ordered with the optional
Modbus protocol stack option.
Adjust 20mA
Monitor the …
►DAC Count=13512
…4-20mA>Adjust>Adjust 4mA
COM
►Setup
Print
Menu>Setup>I/O>COM
COM
Menu>Setup>I/O>COM
COM
►Setup
Modbus
COM
►Setup
Menu>Setup>I/O>COM