Watlow Series 965 - Manual (Page 41)

A/M Key: Press once to clear latched
alarms and toggles between Auto and
Manual. If pressed within 5 seconds it
changes from Auto to Manual or vice versa.
While in Manual, percent power is in the
lower display.
MN: Lit when in manual operation. Press A/M twice
to enter Automatic. When blinking, press A/M to
toggle between Auto and Manual. After 5 seconds
without key activations it returns to its previous state.
MODE Key: Steps the control
through the operating menu,
also, in the Auto mode, new
data is self entering in 5 sec-
onds.
Up-arrow/Down-arrow Keys: When pressed simultaneously for 3
seconds, the Setup Menu appears displaying the LOC parameter.
Continue to press the UP/DOWN keys, and the Calibration menu
appears.
Up-arrow Key: Increases
the value of the displayed pa-
rameter. New data is self
entering in 5 seconds. Down-arrow Key: Decreases
the value of the displayed pa-
rameter. New data is self enter-
ing in 5 seconds.
Lower Display: Red or green, four digit LED
display, indicating the set point, output value,
parameters for data in the upper display, or error
and alarm codes.
L1: When lit it indicates Output 1 is energized.
L2: When lit it indicates when Output 2 is active. This
output can be configured as a control or alarm output.
Upper Display: Red or green, LED display,
indicating either process actual temperature, the
operating parameter values, or an open sensor.
Er 5 - Non volatile checksum error
The nonvolatile memory checksum discovered a checksum error. Unless
a momentary power interruption occurred while the unit was storing data,
the nonvolatile memory is bad. Call the factory.
Er 6 - A/D underflow error
The A/D circuit is underrange. An open or reversed polarity sensor is the
most likely cause. Check the sensor; if the connection is good and
functions properly, call the factory. The A/D underrange voltage is too low
to convert an A/D signal. Make sure the In parameter matches your
sensor and the DIP switches are set accordingly.
Er 7 - A/D overflow error
The A/D circuit is overrange. An open or reversed polarity sensor is the
most likely cause. Check the sensor; if the connection is good and the
sensor functions properly, call the factory. The A/D overrange voltage is
too high to convert an A/D signal. Make sure the In parameter matches
your sensor and the DIP switches are set accordingly. Four dashes, "- - - -" or a negative number, in the upper display indicate a
Series 965 error. The error code is visible in the lower display.
Er 2 - Sensor underrange error (For RTD units only)
The sensor input generated a value lower than the allowable signal range,
or the A/D circuitry malfunctioned. Enter a valid input. Make sure the In
parameter matches your sensor and DIP switch setting. Refer to the table
below for the appropriate input type and range.
Er 4 - Configuration error
The unit's microprocessor is faulty; call the factory.
Error Codes
Process Alarm sets an absolute temperature. When the process
exceeds that absolute temperature limit an alarm occurs. The process
alarm set points may be independently set high and low. Under the
Setup menu, select the type of alarm output with the Ot2 parameter.
PrA = Process alarm
Pr = Process alarm with no alarm message displayed
Deviation Alarm: Alerts the operator when the process strays too far
from set point. The operator can enter
independent high and low alarm settings.
The reference for a deviation alarm is set
point. Any change in set point causes a
corresponding shift in the deviation alarm.
Under the Setup menu, select the type of
alarm output with the Ot2 parameter.
dEA = Deviation alarm
dE = Deviation alarm with no alarm
message displayed
Alarm Silencing is available with the deviation alarm. When SIL is
selected as "on," the operator must manually disable the alarm by
pressing the A/M key once on initial power up (in either the latching or
non-latching mode). Alarm silencing disables the alarm output relay.
However, the L2 LED (also the lower display when Ot2 = dEA) shows
an alarm condition until the process value is within the "safe" region of
the deviation alarm band. Once the process value crosses into the
"safe" region, both a latching or a non-latching alarm is ready. Any
future deviation outside this safe band triggers an alarm.
Both alarms can be latching or non-latching. When the alarm
condition is removed a non-latching alarm automatically clears the
alarm output. You must manually clear a latching alarm before it will
disappear.
Flashing LO or HI in the lower display
indicates an alarm when Ot2 = PrA or
dEA. The lower display alternately
shows information from the current
parameter and a LO or HI alarm mes-
sage at one second intervals. The
alarm output is de-energized, L2 is lit.
To clear an alarm...
• First correct the alarm condition, then...
• If the alarm is latching...
Clear it manually; press the A/M key once as soon as the
process temperature is inside the HSA parameter alarm limit.
• If the alarm is non-latching...
The alarm clears itself automatically as soon as the process
temperature is inside the HSA parameter alarm limit.
Press once
to clear
a latched
and
corrected
alarm.
Alarms
Keys & Displays
Series 965 Quick Reference
Use this page as a quick reference for the Series 965. Tear along the perforation.