3 - 15
XTC/3 Operating Manual
F
igu
re 3-13 XTC/3 st
a
te di
agram
ST
OP
ST
OP
NO
NO
NO
ON
YE
S
YE
S
YE
S
ON
/STB
Y
STB
Y/P
o
w
er
FAIL
ST
ANDB
Y
RESE
T
YE
S
NO
NO
SA
VE
CURRENT PROCESS
DA
TA
TURRE
T DELA
Y
TIME OUT
CRUCIBLE
IN
POSITION
?
t
MEMOR
Y
CHECKS
t
READ
C
O
NFIGURA
TION
t
REST
ORE CURRENT
PROCESS V
A
LUES
RISE TIME
1
SOURCE SWIT
CH
SAME SOURCE AND
CRUCIBLE
?
IDLE
POWER ZERO
?
t
LO
AD FILM
PA
RAME
TERS
SO
AK
TIME
1
RISE TIME
2
SO
AK
TIME
2
SO
AK
HOLD 2 INPUT
?
SHUT
TER
DELA
Y
?
SHUT
TER
DELA
Y
SHUT
TER
DELA
Y
?
CO
N
TR
O
L
DELA
Y
YE
S
YE
S
NO
MPWR
SE
T LA
YE
R
TO
ST
AR
T
)
)
)
)
)
YE
S
YE
S
NO
NO
NO
NO
NO
YE
S
YE
S
YE
S
YE
S
NO
ST
AR
T
or
A
u
to
Star
t
Nex
t=Y
es
READ
Y
IDLE
INCREMENT
LA
YER NUMBER
IF NO
T READ
Y
OR
ST
OP ST
AT
E
WA
S
TIME POWER USED
?
IDLE RA
MP
TIME
FEED TIME
FEED RA
MP
ON FINAL
THK
DECISION
DA
TA
LO
G
UPD
A
TE
THICKNESS
FINAL
X
TAL F
AIL
FINAL THK X
TAL F
AIL
?
RA
TE
RA
MP
FINAL THICKNESS
RA
TE RAMP
THICKNESS
X
TAL F
AIL
FINAL THK THK LIMIT X
TAL F
AIL
?
XT
A
L
SWIT
C
H
SELEC
TED
?
DEPOSIT
RA
TE
W
AT
CHER
DEPOSIT
RE
TAIN
THICKNESS
AT
“ST
OP
” V
A
LU
E
ZERO
THICKNESS
PROCESS CONTINUE
?
GOOD XT
A
L
?
SWIT
C
H
XT
A
L
DESIRED
RA
TE = 0.0
YE
S
NO
XT
SW
TIME POWER
SELEC
TED
?
“T
O
FAIL
URE
A
C
TION
ST
ATE”
TIME POWER
FINAL THICK
?
)