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4/00 UDC 3300 Process Controller Product Manual 91
Lower Display
Prompt
Upper Display
Range of Setting
or Selection
Parameter
Definition
AT ERROR
or
AT ERR 2
(depending on loop)
Read Only
RUNING
NONE
OUTLIM*
IDFAIL*
ABORT
LOW PV*
ACCUTUNE ERROR STATUS—When an error is
detected in the Accutune process, an error prompt will
appear.
RUNNING—An Accutune process is still active checking
process gain, even though “T” is not lit. It does not affect
keyboard operation.
NONE—No errors occurred during last Accutune
procedure.
OUTPUT REACHED LIMITS (HIGH OR LOW)—Output
set insufficiently 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.
IDENTIFICATION PROCESS FAILED—An illegal value
for Gain, Rate, or Reset was calculated.
CURRENT ACCUTUNE PROCESS ABORTED—Caused
by one of the following conditions:
• changing to manual mode
• digital input detected
• changing SP while PV (error) tune in progress
• in heat region of output but a cool output is
calculated, or vice versa.
LOW PV—PV not changed sufficiently or the PV has
increased by more than 4 % and Deadtime not
determined.
*Applies to SP and SP+PV tuning only.