Miller Electric OM-842 - Manuel (Page 26)

OM-842 Page 22
The program number in a display can
be increased by pressing Parameter
Select while any of the repeating
displays are shown. This allows
other programs to be accessed.
NOTE
1. The first repeating display indicates the program num-
ber and that the microprocessor control is ready for
program execution. The display shows:
P R O G R A M # 0 X
U S E R E M O T E T O S T A R T
The next repeating display scrolls into view.
U S E I N C / D E C B U T T O N S
T O C H E C K P A R A M E T E R S
2. This display indicates that the Right/Increase and Left/
Decrease push buttons can be used to access the
displays and verify parameter values.
The next repeating display scrolls into view.
U S E P A R A M E T E R S E L E C T
T O C H A N G E P R O G R A M #
3. This display explains the use of the Parameter Select
push button to change the program number. This al-
lows the creation of more than one program per mode.
The next repeating display scrolls into view.
S E M I – A U T O M A T I C
M O D E X
4. This display is present only in the Semi-Automatic
mode. The display indicates which of the five versions
of Semi-Automatic is active.
The next repeating display scrolls into view.
P R O C E S S P O L A R I T Y I S
< X X .>
5. This display indicates whether the Process Selector
switch is set for ac or dc output.
The first repeating display scrolls into view, and the se-
quence repeats.
5-2. Automatic Mode
If needed, see Section 5-1B for
information on selecting and defining
a parameter.
NOTE
Weld output options, such as the use
of pulsing, high frequency, and ac or
dc output, affect how a program is
entered in the Automatic mode. Be
sure to follow all applicable steps,
and only the applicable steps, as
determined by the selected options.
NOTE
A. Procedure Up To Pulse Mode Selection
1. Turn on welding power source, if applicable.
2. Place the Mode Selector switch in the Automatic posi-
tion.
3. Place the Program/Run/Reset keyed switch in the Re-
set position, and then in the Program position. The
initial displays will be shown.
4. When the repeating displays (explained in Section
5-1F) are shown, press Right/Increase.
If the Process Selector switch is in the ac output posi-
tion, go to Step 5. If the Process Selector switch is in a
dc output position, go to Step 8.
5. The display shows:
# 0 X B A L A N C E C O N T R O L
E N = X X % E P = X X %
6. If applicable, define the program number (see Section
5-1C). Define the electrode negative value for the ac
output square wave (see Section 4-3) as desired.
The range for percentage of waveform in electrode
negative is 46% to 68%, in increments of 2%.
7. Press Right/Increase, and go to Step 8.
8. The display shows:
H I G H F R E Q U E N C Y
> X X X X X X X X X <
9. Press Parameter Select to display the desired choice.
If the Process Selector switch is in the ac output posi-
tion, the choices are Start Only high frequency or
Continuous high frequency.
If the Process Selector switch is in a dc output position,
the choices are Start Only high frequency or Disabled
high frequency.
10. When the desired choice is shown, press Right/In-
crease to advance to the next display. The display
shows:
# 0 X P R E F L O W
T I M E = X X .X