3
SEQUENCE PROGRAM CONFIGURATION AND
EXECUTION CONDITIONS
3.3 Settings for Creation and Execution of Multiple Sequence Programs
3.3.3 Low speed execution type program
3
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1
O
verv
iew
2
Per
fo
rma
nce
S
p
ecifica
tio
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3
S
equ
en
ce P
ro
g
ra
m
Co
nfig
ura
tio
n a
nd
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xecut
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n Co
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I/O N
unb
er
Assig
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m
e
nt
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Me
mor
ie
s a
nd
File
s
Ha
nd
led
by CP
U Mo
du
le
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Func
tions
7
Co
mmu
nic
a
tion
us
in
g
bu
ilt
-i
n E
th
e
rne
t po
rt
s o
f
CP
U mod
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8
Co
mm
un
icatio
n
w
ith
Int
e
lli
ge
nt
Fun
ction
Mo
du
le
When low speed program execution time is set
The following timing charts show the operations performed when low speed execution
type programs are executed under the conditions given below.
• Low speed program execution time : 3ms
• Total execution time of scan execution type programs : 4 to 5ms
• Execution time of low speed execution type program A : 1ms
• Execution time of low speed execution type program B : 3ms
• END processing/low speed END processing : 0ms (assumed to be 0ms for easy
understanding)
Figure 3.33 Asynchronized tracking mode (SM330: OFF)
Figure 3.34 Synchronized tracking mode (SM330: ON)
0
18.5
25.5
33.5 (ms)
4ms
1ms
2ms
4.5ms
1ms
4ms
Low speed scan time
4
11.5
2ms
1ms
1ms
1ms
1ms
4ms
5ms
3ms
Scan execution type
program
Low speed execution
type program A
Low speed execution
type program B
Low speed
scan time
(12.5ms)
Low speed
scan time
(8ms)
(8ms)
Low speed END
processing
execution
Low speed END
processing
execution
Low speed END
processing
execution
END
processing
END
processing
END
processing
END
processing
END
processing
0
16.5
23.5
29.5
(ms)
4ms
1ms
2ms
4.5ms
1ms
4ms
2ms
4
11.5
1ms
1ms
1ms
5ms
2ms
4ms
Scan execution type
program
Low speed execution
type program A
Low speed execution
type program B
Low speed scan time
Low speed scan time
(12.5ms)
(12ms)
Low speed END
processing execution
Low speed END
processing execution
END
processing
END
processing
END
processing
END
processing
END
processing