Amada 1-288-01, Operation Manual, Page: 47 / 144

CHAPTER 3: SYSTEM CONFIGURATION
HF28 DC RESISTANCE WELDING SYSTEM
990-372 3-15
Weld State
Once weld current is flowing, the Control is in the
WELD
state. You can terminate weld current in five
ways:

Remove the first level of a single-level foot switch, assuming weld abort is ON.

Remove the second-level of a two-level foot switch, assuming weld abort is ON.

Input the process stop signal (refer to Appendix B, Electrical and Data Connections ).

Open the normally closed switch across the operator emergency stop switch cable.
NOTE:
This action removes all power from the Control.

Through the action of the monitor settings.
Completion of the firing state is indicated by a profile of actual delivered weld energy superimposed on
the programmed weld energy trace, as shown in the example above.
Monitor State
From the
MONITOR
keys section on the front
panel, press the
kA
,
V
,
kW
or
Ω
key to go to the
monitor state. In this state, when the Control
detects an out of limits condition, it will take one
of four actions for
PULSE 1
, and one of two
actions for
PULSE 2
depending on the selection
made with the
MONITOR
display as shown at the right. Also, an alarm message will be displayed and
any relay set for
ALARM or OUT OF LIMITS
will be energized.
The selections for
PULSE 1
are:

NONE:
The weld cycle will continue.

STOP WELD:
The weld cycle will stop immediately. Pulse 2 (if applicable) will not fire.

INHIBIT PULSE 2:
During the
COOL
time, the Control calculates the average of the Weld1 pulse
(including upslope, weld and downslope). If the average of the Weld1 pulse is out of limits, the
weld cycle will stop and the Weld2 pulse will be inhibited.

PART CONDITIONER (Stop Pulse 1)
stops Pulse 1 immediately after upper or lower energy
limits are exceeded, but allows Pulse 2 to fire.
The selections for
PULSE 2
are:

NONE:
The weld cycle will continue.

STOP WELD:
The weld cycle will stop immediately.
The display shows the actual trace of the weld current, voltage or power, and either the peak or the
average value for each weld pulse as selected by pressing the
PEAK/AVERAGE
key.
See Chapter 4, Using Feedback Modes and Weld Monitoring for a detailed description of monitor and
energy limits operation.