Amada Miyachi Unitek STA-100A, Operation Manual, Page: 95 / 154

STA SERIES AC CONTROLS
990-351 D-1
APPENDIX D
SYSTEM TIMING
Input and Output Timing Signals
Figure B-1 shows the timing signals for the pulsed, latched, and maintained start signals. Table B-1 is
the binary input for the schedules.
Pulsed, Latched, and Maintained Start Signals
FS2
Pulsed Start (Standard Two-Stage Operation)
FS1
FS2
Sched
SQD SQZ UP1 W1 DN1 CO UP2 W2 DN2 HO
Latched Start (Holding Two-Stage Operation)
FS1
FS2
Sched
SQD SQZ UP1 W1 DN1 CO UP2 W2 DN2 HO
Maintained Start
START signals
(FS1 + FS2)
need only be
held through
SQD.
START signals
(FS1 + FS2) must
be held through
SQZ.
START signals
(FS 1 + FS2)
must be held
throughout weld
sequence. If
released before
completion of
weld, the weld
sequence will be
terminated.
T
0
T
0
T
1
T
0
T
0
= Debounce Period (30-70 ms)
T
1
= Hold Period (SQD + SQZ)
T
0
FS1
T
0
T
0
Sched
SQD SQZ UP1 W1 DN1 CO UP2 W2 DN2 HO OFF
End T
2
End T
2
OFF
End T
2
OFF
T
2
= End of Weld Signal (40-70 ms, minimum). Signal will be held until Start signal(s) are removed.