Miller Electric D-74D manual Setting Internal DIP Switches, Automatic Run-In OFF S1-1 And S1-2

5-8. Setting Internal DIP Switches

Right Side Motor

Control Board PC1

P1

Left Side Motor

Control Board

PC101

Remove wrapper.

1DIP Switch S1 On Motor Board PC1

wSetting 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.

This illustration shows
the factory setting of S1.	1

. 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.

.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.

Tools Needed:

1/4 in

Position Settings And Results For DIP Switch S1 On PC1 And PC101

Automatic Run-In (ON)

(Factory Default)

S1-1 And S1-2

On = Run-In speed is approximately 1/2 weld wire feed speed.

Automatic Run-In (OFF)

S1-1 And S1-2

Off = Run-In speed is set using potentiometer P1 located on Motor Board PC1.

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.

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-1500-6 Page 16