Emerson Rosemount 644 FOUNDATION, Reference Manual

Page: 33 / 64

27
Reference Manual
00809-0400-4728, Rev CA
Configuration
September 2018
Configuration
Self test procedure for the LCD display
The SELF_TEST parameter in the Resource block will test LCD display segments. When running, the
segments of the display should light up for about five seconds.
If your host system supports methods refer to your host documentation on how to run the “Self Test”
method. If your host system does not support methods, then you can run this test manually be following
the steps below.
1. Put Resource block into “OOS” (Out of Service).
2. Go to the parameter called “SELF_TEST” and write the value Self test (0x2).
3. Observe the LCD display screen when you are doing this. All of the segments should light up.
4. Put the Resource block back into “AUTO.”
Table 2-11. LCD Transducer Block BLOCK_ERR messages
Condition name and description
Other
Out of Service: The actual mode is out of service.
Symptom Possible causes Recommended action
The LCD displays “DSPLY#INVLID.” Read the
BLOCK_ERR and if it says “BLOCK
CONFIGURATION” perform the
Recommended Action
One or more of the display parameters
are not configured properly.
See “LCD transducer block” on
page 18 .
The AI.OUT readings do not match.
The OUT_SCALE of the AI block is not
configured properly.
See “Analog input function block” on
page 24 .
“644” is being displayed or not all of the values
are being displayed.
The LCD block parameter
“DISPLAY_PARAMETER_SELECT is not
properly configured.
See “LCD transducer block (index
number 1200)” on page 9 .
The display reads OOS.
The resource and or the LCD Transducer
block are OOS.
Verify that both blocks are in “AUTO.”
The display is hard to read.
Some of the LCD segments may have
gone bad.
See XXXX (Self Test). If some of the
segment is bad, replace the LCD
display.
Device is out o the temperature limit for
the LCD display. (–20 to 80 °C)
Check ambient temperature of the
device.