APPENDIX C: SYSTEM TIMING
IS-300CA INVERTER POWER SUPPLY
C-12 990-418
Successive and Back Step Function
This function can switch welding multiple SCHEDULEs in order to perform them each time
the 1ST STAGE signal and the 2ND STAGE signal are input.
The SCHEDULE used in the successive function is set in SUCCESSIVE on the FORCE
SETUP & MONITOR screen. For details, see Chapter 3, Section III, Force Setup & Monitor
Screen.
When the back step signal is input, SCHEDULE returns to the previous one.
Also, when the back step signal is input over 1.5 seconds, SCHEDULE returns to the first one.
The END signal is output at the end of each SCHEDULE.
[Example] At 1-stage start operation
(For 2-stage start, the start method is different, but the operation after start is the same.)
In this example, the SUCCESSIVE settings for SCHEDULE1, 2 and 5 are ON, and those for
other SCHEDULEs are OFF.
SCHEDULE1 comes after SCHEDULE5.
Next, when the 2ND STAGE signal is input, the sequence starts from the first SCHEDULE1.
The sequence also starts from SCHEDULE1 once the power supply is turned off.
SCH 1
SCH 2
T1 T1
SCH 5
T2
T1 T1
SCH 1
T1
T2 T2 T2 T2
SCH 1
T1 : T ime se t by [DELAY START SET ]
VALVE OUTPUT
We ld ing sequence
END ( o u t )
ERROR ( o u t )
STEP END (ou t )
STEP RESET ( in )
BACK STEP ( i n )
(Se lec te d v a l v e )
(When fau l t occu r . )
(When s teps comp le ted . )
1ST/2ND STAGE ( in )
T2 :Durat ion of END output s igna l
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