IS-300A
8. Timing Chart
8-4
3 When the step end occurs
A sample weld sequence is shown, which represents the occasion where the step is
complete in the step-up (-down) function set on the MODE SELECT screen and the
STEPPER COUNT screen.
COOL2
WELD2
DOWN2
WELD1
UP1 COOL1DOWN1 UP2 UP3
WELD3
DOWN3
(Note 1) The STEP END output is ON until the STEP RESET signal is received.
4 When precheck caution/error occurs
A sample weld sequence is shown, which represents the occasion where CAUTION
or ERROR is produced when a monitored value goes out of the range between the
upper and lower limit set in the PRECHECK screen.
HOWE3CO2WE2WE1 CO1
(Note 1) When the precheck caution or error occurs, subsequent welding
sequence is not performed.
2ND STAGE
SQD
SQZ
Welding current
HOLD
END
STEP END
STEP RESET
Monitored value judgment time
(200 μs max.)
(Note 1)
HEAT1
HEAT2
HEAT3
STEP END processing time
(50 μs max.)
2ND STAGE
SOL1/SOL2
SQD
SQZ
PRECHECK
PRECHECK
judgment time
CAUTION
ERROR
(Note 1)
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