Amada Miyachi Unitek STA-100A, Operation Manual, Page: 21 / 154

CHAPTER 1: DESCRIPTION
STA SERIES AC CONTROLS
990-351 1-7
Modes When the
WELD ON/OFF
pushbutton switch is set to
OFF
, pressing this pushbutton
switch will cause the Mode screen to appear on the display. See Chapter 3 for details
of this screen.
Reset Pressing this pushbutton switch will reset the Control after a major error signal is
received. (Major errors are
Emergency Stop, Over-temperature, No Current, Mode
Change Error, End of Stepper Function, Weld1 or Weld2 Conduction High, Weld1 or
Weld2 Current High, Full Wave Conduction, Illegal Schedule Number,
or
SCR
shorted
.) Pressing this pushbutton also resets minor errors if auto reset is turned
OFF
. See Chapter 3, Using STA Series Control Functions, Section VIII .
Monitor When the
WELD ON/OFF
pushbutton switch is set to
OFF
, pressing this pushbutton
switch will cause the Monitor screen to appear on the display. See Chapter 3 for
details of this screen.
Stepper When the
WELD ON/OFF
pushbutton switch is set to
OFF
, pressing this pushbutton
switch will cause the
Stepper
screen to appear on the display. See Chapter 3 for
details of this screen.
This screen allows information to be programmed to compensate for gradual
degradation of the weld electrodes by adjusting power to compensate for that
degradation. Power can be adjusted either up or down.
Programming
Lock
This optional key lock prevents any change in the program when it is locked.
External Connectors
External connectors for Voltage Sensing, Current Sensing, Data & Communications (RS-232 or RS-
485), and cooling water for the SCRs are on a panel that can be mounted on the top, bottom, or sides of
the Control.