Miller Electric OM-842 - Manuel (Page 25)

OM-842 Page 21
SECTION 5 – PROGRAMMING
5-1. General
A. Displays
The displays presented by the microprocessor control either
provide information to the user, or allow the user to enter infor-
mation needed for program execution. The displays vary from
mode to mode. Within each mode, the displays are always
shown in the same sequence.
Pressing the Right/Increase push button allows the user to
move forward through the sequence of displays, beginning to
end. Pressing the Left/Decrease push button allows the user
to move backward through the displays. Either push button
can be used to access displays.
B. Selecting And Defining A Parameter
The user defines a parameter by entering a value for it. This is
normally a three-step process (exceptions are noted in the
text), that is carried out as follows:
1. Press Parameter Select (see Section 3-8) to select the
parameter (the parameter flashes).
2. Press Right/Increase (see Section 3-9) or Left/De-
crease (see Section 3-10) to enter the desired value.
3. Press Parameter Select again to deselect the parame-
ter (the parameter stops flashing). If the display
contains more than one parameter, the next parameter
will be selected.
Parameters are always selected in sequence. If the existing
value for the first parameter is acceptable, but another param-
eter needs to be changed, use the Parameter Select push
button to select and deselect the first parameter without
changing its value. The next display in a mode cannot be ac-
cessed if a parameter remains selected (flashing) in the
existing display.
C. Defining Program Number
In some displays, the first parameter is the program number.
This number provides a means of identifying programs en-
tered into the selected mode. Since parameters are selected in
sequence, even when the program number is not being
changed it must be selected and deselected before the next
parameter can be changed.
The program number is normally defined in the first display
used to enter information. The defined number carries over to
the following displays and does not need to be redefined as
long as the original defined number applies.
To avoid unnecessary repetition, this manual does not indicate
that the program number can be redefined in each display con-
taining it. It is assumed that when a program is entered, each
display in sequence applies to the same program.
D. Display Representation
When the microprocessor control’s digital display is repre-
sented in this Owner’s Manual, an “X” is used to represent a
parameter whose contents may vary, as shown in the following
example:
T H E A D J U S T M E N T L I M I T
I S + O R – X X A M P S
E. Initial Displays
Each time power is applied to the microprocessor control or a
reset is initiated on the Program/Run/Reset keyed switch (see
Section 3-7), four displays are shown in sequence, each dis-
play shown once.
1. The first initial display identifies the welding power
source and microprocessor control. The display
shows:
* S Y N C R O W A V E 3 5 1 *
M P C M O D U L E
The next display scrolls into view.
2. The second initial display indicates the part number of
the software program contained in the unit, and the re-
vision level of the program. The display shows:
P A R T # X X X X X X
R E V I S I O N L E V E L X
The next display scrolls into view.
3. The third initial display indicates the copyright for the
program in the unit. The display shows:
C O P Y R I G H T 1 9 9 3
M I L L E R E L E C T R I C M F G .
The next display scrolls into view.
4. The fourth initial display indicates the amperage ad-
justment limits that have been defined (see Section
2-4). The value cannot be modified through this dis-
play. The display shows:
T H E A D J U S T M E N T L I M I T
I S + O R – X X A M P S
The repeating displays scroll into view.
F. Repeating Displays (Ready Condition)
After the initial displays are shown, repeating displays are
shown. These displays scroll continuously until the operator
takes action. The presence of the repeating displays indicates
that the microprocessor control is ready for a program to be en-
tered, or for a program to be executed.