APPENDIX A: TECHNICAL SPECIFICATIONS
MODEL 250DP DUAL PULSE
RESISTANCE WELDING POWER SUPPLY
990-280
A-6
Weld Schedules
You can save (write) 127 different weld schedules in SRAM (Static Random Access Memory.) In this
manual, SRAM is referred to as
permanent memory
. Weld schedules are numbered 1 through 127.
Weld Schedule Definition
A weld schedule is defined as the following information:
a
Schedule number (0 - 127)
g Energy of Pulse 1 and Pulse 2
b
Weld Function
h Cool Time (Rollspot Function)
c
Weld Polarity
i Off Time (Repeat Function)
d
Pulse Width
j Status of Relay 1
e
Next Schedule
k Status of Relay 2
f
Step Count
l Weld Sentry Program(s) A-E of the same number (if the Sentry option has
been installed).
Weld schedules 1 through 127 can be protected from unauthorized or inadvertent changes by Unitek
Peco's system security feature. When the system security is protected, Schedule 0 can still be modified
and used as a "scratchpad.” When schedule lock is also turned ON, no other schedules can be displayed
or used to weld except the currently displayed schedule.
NOTE:
If the security code is lost: Select SYSTEM SECURITY from the main menu. Switch the
WELD SWITCH to NO WELD, press and hold the [SAVE] button, then the press the [
m
] key. The
status will change to UNPROTECTED.
Options
You can change the following options from the main menu:
a
Units of Measure for Energy
f Weld Head Type
b
Schedule Number at Power-Up
g Footswitch Type
c
End of Cycle Buzzer ON/OFF
h Footswitch Weld Abort ON/OFF
d
Chain Schedule ON/OFF
i Firing Switch Type
e
Squeeze Time
j Switch Debounce Time
k Hold Time
