8
4.4 Operator Interface
A. General Information
The operator interface displays messages that it
receives from the programmable controller. Figure
4.5 shows all of the messages which can be displayed.
The messages are arranged in six menus, each
consisting of a number of messages.
At any given time, some messages will be active and
others will be inactive, depending on the operating
status and configuration of the dryer. Two messages
are displayed on the operator interface at all times. If
more than two messages are active, then the
rightmost character of the top and/or bottom
message will contain a flashing arrow.
1)
If the offline tower pressure switch is open, the
program will not advance from step L03 (or R03)
to step L04 (or R04).
2)
If the offline tower pressure switch is closed, the
program will not advance from step L15 (or R15)
to step R00 (or L00).
3)
The F2 key is inoperative if AUTOMATIC advance is
selected (see Menu 3) or if Menu 6 is not dis-
played.
(b) The second message of this menu displays the current
step number and the elapsed time since the start of that
step.
(c) The third message of this menu shows which tower is
drying and the elapsed time since the start of the current
drying cycle.
(7) Menu #7 - For dyers with the optional dew point
monitor. This menu displays the set point for the
high outlet dew point alarm (Alarms L8 and R8) and
allows user to adjust alarm set point. Set point range
is -130
°
F to +50
°
F (-90
°
C to +10
°
C). If user enters a
value outside this range, it will automatically be
adjusted to the maximum or minimum allowable.
Factory setting is -4
°
F (-20
°
C).
To change alarm set point, first display Menu #7 and
use the up /down arrow keys to place blinking cursor
(located on the left side of screen) on the line display-
ing
°
F or
°
C. Press enter key and the cursor will move
to field containing set point. Use up / down arrow
keys to adjust set point to desired value. Press enter
key to accept new set point. NOTE: When one value
(
°
F or
°
C) is changed, the other is automatically
updated.
Figure 4.4 - Operator Interface
B. Function Keys
There are nine keys on the operator interface. The use of
each key is described below.
(1) The F1 key is the alarm reset. It can be pressed at any
time to reset an alarm, as long as the fault condition has
been corrected.
(2) The F2 key is used to manually advance the dryer
through its operating cycle. The F2 key is only active
when the diagnostic menu (Menu #6) is displayed.
(3) The F3 key changes the display from one menu to the
next. This key is active at all times.
(4) The F4 key performs three different functions, as
described in Menu #’s 3, 4, and 5. The F4 key is only
active when one of these menus is displayed.
(5) Use the UP ARROW and DOWN ARROW (triangular) keys to
scroll through the messages of the selected menu.
(6) The SHIFT, ESC, and ENTER keys are not used.
C. Menus
(1) Menu #1 - This menu contains information about the
current operating status and configuration of the dryer.
(2) Menu #2 - This menu displays all active alarms. To reset
an alarm, first correct the fault condition (see Section
5.0) and then press the F1 key on the operator interface.
(3) Menu #3 - This menu displays the current selection of
MANUAL or AUTOMATIC advance and allows the user to
change the selection using the F4 key.
(4) Menu #4 - This menu displays the current selection for
the auto-stop feature, DISABLED or ENABLED (see
Section 4.2.B), and allows the user to change the selec-
tion using the F4 key. Auto-stop can only be enabled if
automatic advance is selected.
(5) Menu #5 - This menu displays the current selection of
FIXED or DEMAND cycle and allows the user to change
the selection using the F4 key. If the dryer is not
equipped with the demand cycle option, then the
display does not allow the demand cycle to be selected.
(6) MENU #6 - (a) When MANUAL advance is selected (see
Menu 3) and Menu 6 is displayed, pressing the F2 key will
advance the cycle to the next step, unless the following
conditions are present:
Menu 1
*STATUS MENU*
DEW PT: XXX
°
F XXX
°
C
DEWPT:
DRYER PROGRM
ADVANCE SELECTED
AUTO-STOP
CYCLE SELECTED
TOWER DRYING
STAGE REGENERATION
RUNNING
STOPPED
MAN
AUT
DISABLD
ENABLED
FIXED
DMAND
LEFT
RIGHT
1
2
Menu 2
L1 - LOW TOWER PRESS.
L2 - DEWPT BREAKTHRU.
L3 - FAIL TO DEPRESS.
L4 - LOW BLOWER PRESS.
L5 - HIGH HEATER TEMP.
L6 - INCOMPLETE HEATNG
L7 - FAIL TO REPRESS.
L8 - HIGH OUTLET DEWPT
R1 - LOW TOWER PRESS.
R2 - DEWPT BREAKTHRU.
R3 - FAIL TO DEPRESS.
R-4 - LOW BLOWER PRESS.
R5 - HIGH HEATER TEMP.
R6 - INCOMPLETE HEATNG
R7 - FAIL TO REPRESS.
R8 - HIGH OUTLET DEWPT
NO ACTIVE ALARMS
ACTIVE ALARMS
Menu 3
* ADVANCE ON*
PRESS F4 FOR
MAN
AUTO
Figure 4.5 - Operator Interface Messages
F1
F2
F3
F4
Operator Interface
SHIFT
ESC
ENTER
Display
OVER-RANGE(HI)
UNDR-RANGE(LO)
Menu 4
*AUTOSTOP *
PRESS F4 TO
AUTO
MANUAL
DISABLD
ENABLED
ENABLE
DISABLE
Menu 6
*DIAGNOSTIC MENU*
CURRENT STEP # XX
Menu 5
* CYCLE ON*
DEMAND NOT AVAILABLE
PRESS F4 FOR
FIXED
DEMAND
DEMAND
FIXED
L
R
Menu 7
*ALARM SET PT* XXX
°
F
XXX
°
C
NOTES:
Text shown with a horizontal line
(e.g.,
)
indicates two possible
displays. The displayed information depends
on the operating status of the dryer.
xx = the step number
hh:mm:ss = the elapsed time in hours,
minutes, and seconds.
Some messages may not be displayed,
depending on the dryer configuration and
operating status.
Demand
Fixed
