Configuration
3/07 UDC3500 Universal Digital Controller Product Manual 77
Function Prompt
Lower Display
Selections or
Range of Setting
Upper Display
Parameter
Definition
AT ERROR
(Read Only)
ACCUTUNE ERROR STATUS—When an error is
detected in the Accutune process, an error prompt
will appear.
NONE
NONE—No errors occurred during last Accutune
procedure.
RUNNING
RUNNING—An Accutune process is still active
checking process gain, even though “T” is not lit. It
does not affect keyboard operation.
ABORT
CURRENT ACCUTUNE PROCESS ABORTED—
Caused by one of the following conditions:
• changing to manual mode
• input detected
• heat region of output but a cool output was
calculated, or vice versa
• SP was changed while PV (error) tune was in
process
SP2
SP2—LSP2 not configured or a Setpoint other than
LSP1 or LSP2 is in use.
OUTLIM
OUTPUT LIMIT REACHED (HIGH OR LOW)—
Applies only to SP or SP+PV tuning. Output
insufficient to get to SP value.
ATTENTION This error will cause the controller to
switch from Automatic to Manual Mode. The output
is then set to the value present at the beginning of
the ACCUTUNE process.
IDFAIL
PROCESS IDENTIFICATION PROCESS FAILED—
Applies only to SP or SP+PV tuning. An illegal value
for Gain, Rate or Reset was calculated.
LOW PV
LOW PV—Applies only to SP or SP+PV tuning. PV
did not change sufficiently or the PV has increased
by more than 4% but Deadtime was not determined.
AT ERR 2
(Read Only)
Same as Loop 1.
ACCUTUNE ERROR STATUS FOR LOOP 2
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