Watlow Series 942 - Manual (Page 21)

Keys and Displays, Chapter 3
21
WATLOW Series 942 User's Manual
Keys/Displays
Front Panel
Locking Screw
Secures or releases the
control chassis from its case. MODE Key
Steps the control through the
Operating menu; also, automati-
cally enters data changes before
proceeding to the next parameter.
UP Key
Increases the value of the
displayed parameter. A light
touch increases the value by
one. Hold the key down to
increase the value at a rapid
rate. New data is self entering
in 5 seconds. HOLD/RUN Key
Pressed once, it clears
any latched alarms
without altering the
HOLD/RUN status. To
run or halt a program see
Chapter 5 for details. DOWN Key
Decreases the value of the
displayed parameter. A light
touch decreases the value by
one. Hold the key down to
decrease the value at a rapid
rate. New data is self entering
in 5 seconds.
L3 & L4
When lit, these LEDs
indicate an energized
alarm or event condi-
tion for Output 3 or 4.
Only appears on those
units with auxiliary
option.
Lower Display
Red 0.56" (14 mm) high, seven segment, four digit LED display, indicating the
set point, menu parameters, and alarm or error codes.
L 1 & L2
When lit, these LED's tell
you when Output 1 or 2 is
energized. L2 only appears
if your unit has a #2 output.
Upper Display
Red, 0.56" (14 mm) high, seven segment, four digit LED display, indicating
process variable (such as actual temperature) in addition to parameter values,
or an open sensor. When powering up, the Process display will be blank for 8
seconds.
UP/DOWN Keys
When pressed simultaneously for 3 seconds, the Setup Menu appears
displaying the LOC parameter. At the LOC parameter, continue to press
the UP/DOWN keys, and the Calibration Menu will appear.
HOLD/RUN LED
Lit when the control is RUN-
ning. When blinking, press the
HOLD/RUN key again to begin
RUNning.
Chapter 3
How to Use the Keys and Displays
After 1 minute with no key activations, the control reverts to the process
value in the Upper display and the set point in the Lower display, except
when in the RUN menu.
Figure 31 -
Series 942
Keys and Displays.