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Reference Manual
00809-0200-4101, Rev AA
July 2008
5-7
Rosemount 2051
ANALOG INPUT (AI)
FUNCTION BLOCK
This section describes error conditions that are supported by the AI Block.
Read Table 5-9 to determine the appropriate corrective action.
Table 5-8. AI BLOCK_ERR
Conditions.
Table 5-9. Troubleshooting the
AI block
LCD TRANSDUCER
BLOCK
This section describes error conditions found in the LCD Transducer Block.
Read Table 5-10 and to determine the appropriate corrective action.
Self Test Procedure for the LCD
The SELF_TEST parameter in the Resource block will test LCD 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 than you can run this test manually be following the steps below.
Condition
Number
Condition Name and Description
0 Other
1 Block Configuration Error: the selected channel carries a measurement that
is incompatible with the engineering units selected in XD_SCALE, the L_TYPE
parameter is not configured, or CHANNEL = zero.
3 Simulate Active: Simulation is enabled and the block is using a simulated
value in its execution.
7 Input Failure/Process Variable has Bad Status: The hardware is bad, or a
bad status is being simulated.
14 Power Up
15 Out of Service: The actual mode is out of service.
Symptom Possible Causes Recommended Actions
Bad or no pressure readings
(Read the AI “BLOCK_ERR”
parameter)
BLOCK_ERR reads OUT OF
SERVICE (OOS)
1. AI Block target mode target mode set to OOS.
2. Resource Block OUT OF SERVICE.
BLOCK_ERR reads
CONFIGURATION ERROR
1. Check CHANEL parameter (see “CHANNEL” on page 3-9)
2. Check L_TYPE parameter (see “L_TYPE” on page 3-9)
3. Check XD_SCALE engineering units. (see “XD_SCALE and
OUT_SCALE” on page 3-10
BLOCK_ERR reads POWERUP Download Schedule into block. Refer to host for downloading
procedure.
BLOCK_ERR reads BAD INPUT 1. Sensor Transducer Block Out Of Service (OOS)
2. Resource Block Out of Service (OOS)
No BLOCK_ERR but readings are
not correct. If using Indirect mode,
scaling could be wrong.
1. Check XD_SCALE parameter.
2. Check OUT_SCALE parameter.
(see “XD_SCALE and OUT_SCALE” on page 3-10)
No BLOCK_ERR. Sensor needs to
be calibrated or Zero trimmed.
See Section 3: Operation and Maintenance to determine the
appropriate trimming or calibration procedure.
OUT parameter status reads
UNCERTAIN and substatus reads
EngUnitRangViolation.
Out_ScaleEU_0 and EU_100
settings are incorrect.
See “XD_SCALE and OUT_SCALE” on page 3-10.