Setting Internal Dip Switches - Miller Electric S-74D Owner's Manual

5-7. Setting Internal DIP Switches

P1
Automatic Run-In (ON)
(Factory Default)
S1-1 And S1-2
On = Run-In speed is
approximately 1/2 weld wire
feed speed.
.
When DIP switch positions are changed, the unit must be
turned Off and then On again in order for the new settings
to be active. DIP switches are only read on power up.
Position Settings And Results For DIP Switch S1 On PC1
Automatic Run-In (OFF)
S1-1 And S1-2
Off = Run-In speed is set using
potentiometer P1 located on Motor
Board PC1.
This illustration shows
the factory setting of S1.
.
In the DIP switch S1 illustrations,
the elevated slider on each switch
is shown in white. For example,
the switches above are all in the
Off position.
Current Detect Override (ON)
S1-1 And S1-2
On = Current detect over-
ride. For welding power
sources that don't provide
current feedback through
the 14-pin receptacle. Run-
in is inactive.
Remove wrapper.
1 DIP Switch S1 On Motor
Board PC1
w Setting Current Detect
Override (S1-1)
Current detect override is used to
disable run-in when a welding pow-
er source is used that doesn't pro-
vide current feedback through the
14-pin receptacle.
.
Pins F & H are not present in 14
pin receptacle on machines
that don't provide current feed-
back.
Install wrapper when finished.
1
Tools Needed:
1/4 in
Current Detect Override (OFF)
(Factory Default)
S1-1 And S1-2
Off = Current must be detected
from power sources that provide
current feedback through the
14-pin receptacle to go from run-in
to welding condition. Run-in is
active.
803 063 / Ref. 802 944
OM-1500-10 Page 15