Analog Input Diagnostics - Emerson Rosemount Reference Manual

Reference Manual
00809-0100-4021, Rev GC
4.9.7

Analog input diagnostics

Table 4-9. AI BLOCK_ERR Conditions
Condition
number
Table 4-10. Troubleshooting the AI block
Symptom
Bad or no temperature
readings
(Read the AI "BLOCK_ERR"
parameter)
OUT parameter status reads
UNCERTAIN and substatus
reads EngUnitRangViolation.
Foundation™ fieldbus configuration
Condition name and description
0 Other
Block Configuration Error: the selected channel carries a measurement
1 that is incompatible with the engineering units selected in XD_SCALE,
the L_TYPE parameter is not configured, or CHANNEL = zero.
Simulate Active: Simulation is enabled and the block is using a
3
simulated value in its execution.
Input Failure/Process Variable has Bad Status: The hardware is bad, or a
7
bad status is being simulated.
14 Power Up: Block is not scheduled.
15 Out of Service: The actual mode is out of service.
Possible causes
BLOCK_ERR reads OUT OF
SERVICE (OOS)
BLOCK_ERR reads
CONFIGURATION ERROR
BLOCK_ERR reads POWERUP
BLOCK_ERR reads BAD INPUT
No BLOCK_ERR but readings
are not correct. If using Indirect
mode, scaling could be wrong.
No BLOCK_ERR. Sensor needs
to be calibrated or Zero
trimmed.
Out_ScaleEU_0 and EU_100
settings are incorrect.
Section 4: F
OUNDATION
Recommended actions
1. AI Block target mode target mode set to OOS.
2. Resource Block OUT OF SERVICE.
1. Check CHANNEL parameter (see
page 156)
2. Check L_TYPE parameter (see
3. Check XD_SCALE engineering units. (see
and OUT_SCALE" on page
Download schedule into block. Refer to host for
downloading procedure.
1. Sensor Transducer Block Out Of Service (OOS)
2. Resource Block Out of Service (OOS)
1. Check XD_SCALE parameter.
2. Check OUT_SCALE parameter.
(see "XD_SCALE and OUT_SCALE" on page
See Section 3: HART® commissioning
appropriate trimming or calibration procedure.
See "XD_SCALE and OUT_SCALE" on page
fieldbus Configuration
April 2014
"CHANNEL" on
"L_TYPE" on page 156)
"XD_SCALE
156)
156)
to determine the
156.
161