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Reference Manual
00809-0400-4728, Rev AA
June 2011
Rosemount 644
3-14
LCD Transducer Block The LCD meter connects directly to the 644 electronics FOUNDATION fieldbus
output board. The meter indicates output and abbreviated diagnostic
messages.
The first line of five characters displays the sensor being measured.
If the measurement is in error, “Error” appears on the first line. The second
line indicates if the device or the sensor is causing the error.
Each parameter configured for display will appear on the LCD for a brief
period before the next parameter is displayed. If the status of the parameter
goes bad, the LCD will also cycle diagnostics following the displayed variable.
Custom Meter Configuration
Shipped from the factory, Parameter #1 is configured to display the Primary
Variable (temperature) from the LCD Transducer Block. Parameters 2 – 4 are
not configured. To change the configuration of Parameter #1 or to configure
additional parameters 2 – 4, use the configuration parameters below.
The LCD Transducer Block can be configured to sequence four different
process variables as long as the parameters are sourced from a function
block that is scheduled to execute within the 644 temperature transmitter. If a
function block is scheduled in the 644 that links a process variable from
another device on the segment, that process variable can be displayed on the
LCD.
DISPLAY_PARAM_SEL
The DISPLAY_PARAM_SEL parameter specifies how many process
variables will be displayed. Select up to four display parameters.
BLK_TAG_#
(1)
Enter the Block Tag of the function block that contains the parameter to be
displayed. The default function block tags from the factory are:
TRANSDUCER
AI 1300
AI 1400
PID 1500
BLK_TYPE_#
(1)
Enter the Block Type of the function block that contains the parameter to
be displayed. This parameter is generally selected via a drop-down menu
with a list of possible function block types. (e.g. Transducer, PID, AI, etc.)
PARAM_INDEX_#
(1)
The PARAM_INDEX_# parameter is generally selected via a drop-down
menu with a list of possible parameter names based upon what is
available in the function block type selected. Choose the parameter to be
displayed.
CUSTOM_TAG_#
(1)
The CUSTOM_TAG_# is an optional user-specified tag identifier that can
be configured to be displayed with the parameter in place of the block tag.
Enter a tag of up to five characters.
(1) # represents the specified parameter number.