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197
Reference Manual
00809-0100-4530, Rev DD
May 2016
7.25.3
Analog Input (AI) function block
This section describes error conditions that are supported by the AI Block. Read
to determine the appropriate corrective action.
Table 7-18. AI BLOCK_ERR Conditions
Table 7-19. 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 level readings
(Read the AI “BLOCK_ERR”
parameter)
BLOCK_ERR reads OUT OF
SERVICE (OOS)
1. AI Block target mode set to OOS.
2. Resource Block OUT OF SERVICE.
BLOCK_ERR reads
CONFIGURATION ERROR
1. Check CHANNEL parameter (see
).
2. Check L_TYPE parameter (see
).
3. Check XD_SCALE engineering units. (see
“XD_SCALE and OUT_SCALE” on page 128
.
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 128
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 128
.
Mode will not leave OOS
Target mode not set
Set target mode to something other than OOS.
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