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Page 33
DIAGNOSTIC ERROR MESSAGES
DISPLAY MEANING SP OUTPUTS ACTION REQUIRED
UFL
or
OFL
Underflow or
Overflow: Process
value has exceeded
input range ends
Set point outputs
active
Alarm active.
Input signals may normally
go above or below range
ends. If not, check input
and correct.
UFL or OFL will
sequence to display
one of these mes-
sages if the InPt is
set for a time value.
For RTD inputs RTD
is open or shorted.
For THERMOCOU-
PLE inputs thermo-
couple is open.
To reset use the INDEX
and ENTER keys. When
InPt (input fault timer) has
been set for a time, the
outputs will be turned off
after the set time. Setting
the time to OFF causes
the outputs to remail ac-
tive, however UFL or OFL
will still be displayed.
Correct or replace sensor.
To reset use the INDEX &
ENTER keys.
Set point outputs
inactive
Alarm active.
bAd
InP
OPEn
InP
LOOP
bAd
The sensor may be
defective, heater fuse
open, heater open,
or the final power
output device is bad.
Set point outputs
inactive
Alarm active.
Correct or replace sensor,
or any element in the con-
trol loop that my have
failed. Correct the prob-
lem, and reset the control
by pressing INDEX and
ENTER keys, or INDEX to
LPbr and press ENTER.
SEnC
bAd
Sensor Rate of
Change exceeded
the programmed lim-
its set for SEnC.
Set point outputs
inactive
Alarm active.
Check for the cause of the
error. The value setting
may be too slow for the
process, or the sensor is
intermittent. Correct the
problem and press INDEX
and ENTER to reset.
CHEC
CAL
Check calibration
appears as an alter-
nating message if the
instrument calibration
nears tolerance edge.
Set point outputs
active
Alarm active.
Remove the instrument for
service and / or recalibra-
tion. To reset use the
INDEX & ENTER keys.
Check calibration
appears as an alter-
nating message if the
instrument calibration
exceeds specification.
Set point outputs
inactive
Alarm active.
Remove the instrument for
service and / or recalibra-
tion. To reset use the
INDEX & ENTER keys.
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