
1/03 UDC 6300 Process Controller Product Manual 207
5.20 Accutune™, Continued
Error prompt
accessing procedure
When an error is detected in the Accutune process, the message “AT
ABORT” will appear in the lower display.
In order to determine what is causing the error:
• Select “ACCUTUNE” or “ACCUTUNE2” Set Up Group
• Access function prompt “AT ERROR” or “AT ERR2” for error prompt.
Table 5-30 lists the Accutune error codes that will be displayed in the
Upper Display and their definitions.
Error prompt
Table 5-42 lists the Adaptive Tune error prompts and their definitions.
Table 5-42 Adaptive Tune Error Prompt Definitions
Upper Display
Prompt
Prompt Definition Action to Take
NONE
NO ERRORS None
OUTLIMIT
SP Adapt step is greater than high
output limit or less than low output limit
Output step insufficient to get to SP
Value
• Check the output limits under Set Up
group prompt “CONTROL”, function
prompts “OUTHILIM” and
“OUTLOLIM” in Section 3 -
Configuration.
• Check “PROCESS GAIN” . Refer to
Table 5-36.
IDFAIL
Process Identification Failure
A illegal value of gain, Rate, or reset
was calculated.
Try to SP tune again.
ABORT
(Only error code
available for
“TUNE”)
• Manual abort has occurred
– Accutune will abort if the
MAN/AUTO
key is pressed during
tuning
• Digital Input detected
• Automatic Abort has occurred
– Accutune will automatically abort
when a PV oscillation has been
detected during “SP ADAPT”,
whenever any SP values are
changed during a “PV ADAPT”, or
when Accutune is disabled.
Try to TUNE or SP tune again.
LOW PV
PV not changed sufficiently or the PV
has increased by more than 4% and
Deadtime not determined.
NONE - After a period of about 5
minutes, the “SP Ony” will be re-tried
automatically with a larger output step.
RUNNING
Informational prompt indicating that
“SP Only” is still active checking
process gain even though “T” is not lit.
It does not affect the keyboard
operation.
None
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