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Reference Manual
00809-0400-4728, Rev AA
June 2011
Rosemount 644
3-22
Table 3-6. AI BLOCK_ERR
Conditions.
Table 3-7. Troubleshooting the
AI block
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 temperature 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 CHANNEL parameter (see “CHANNEL” on page 3-9)
2. Check L_TYPE parameter (see “L_TYPE” on page 3-10)
3. Check XD_SCALE engineering units. (see “XD_SCALE and
OUT_SCALE” on page 2-10
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.