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TM 9-2320-364-34-1
NOTE
You must be viewing the data list before you can freeze an item.
3
For the purposes of freezing data, the four lines in the readout display are numbered 1 through 4
from the top. Use the UP and DOWN arrow keys to scroll the data list. When an item you want
to freeze is visible (on any readout line), press the numerical key that corresponds to the readout
line of that item. A solid black square appears next to the item. In the following example,
suppose you want to freeze OIL TEMP. To do so, press numerical key 3 because OIL TEMP is
displayed on line 3.
LOCKUP RPM
1234
OUTPUT RPM
1234
OIL TEMP 123F
1234
FWD PRESS SW
OFF
Data Readout Window
4
Now, when you use the UP and DOWN arrows to scroll the data list, OIL TEMP remains frozen
in position on the third line of the display. Although the item is frozen, its value is able to change,
according to system operation.
RETARD REQUEST  YES
RETARD COMMAND  YES
OIL TEMP 123F 123C
SPECIAL INPUT  OFF
Data Readout Window
5
Now, suppose you also want to watch SPECIAL INPUT. Use the UP and DOWN arrow keys to
scroll the list. As you can see above, the third line remains frozen. Eventually, your item appears
on line 4. Press numerical key 4. The square will appear to indicate that line 4 is also frozen. You
can continue doing this until you have frozen data on all four lines.
(d)
Unfreezing data. There are two ways to unfreeze data. To unfreeze just one line, press the numerical
key corresponding to the line you want to unfreeze. The solid square disappears and the line can now
be scrolled. To unfreeze the entire display at once, press the numerical key 0 (zero). All solid squares
disappear and all lines are unfrozen.
(e)
Functions. The DDR's main purpose is to display data and it does this automatically. The DDR can
also perform several other jobs, called functions. These functions are of two types. Some of them
relate to the way DDR communicates with the ATEC ECU in the truck, such as diagnostic codes and
ranges. Other functions relate to the way the DDR itself operates, such as Snapshot, RS-232 Serial
Port and Contrast Adjustment.
(f)
Use of the FUNC key. For access to the functions, press the FUNC key. The DDR is programmed to
provide access to only those functions that apply. If you see a function displayed, it is available to use.
If you do not see a function displayed, it does not apply.
2-17

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