4 - 21 4 - 21
MELSEC-Q
4 SEQUENCE PROGRAM CONFIGURATION AND EXECUTION
CONDITIONS
1 : Asynchronous method
(1) Constant scan time setting
The low speed execution type program is operated under the following conditions as shown
below.
• Constant scan time
: 8ms
• Total scan execution type program time
: 4ms 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 (0 ms is used to simplify the illustration)
0
8
16
END
processing
24
(ms)
1ms
4.5ms
0.5ms
END
processing
4ms
1ms
END
processing
4ms
Low speed
scan time
Scan execution type program
Low speed execution type program A
Low speed execution type program B
END
processing
4ms
Constant scan wait time
0.5ms
0.5ms
2.5ms
1.5ms
2ms
0.5ms
1.5ms
1ms
1ms
Low speed
END processing
execution
0.5ms
1ms
Low speed
END processing
execution
Low speed
END processing
execution
Low speed
scan time
Low speed
scan time
(13ms)
(8.5ms)
(8.5ms)
(2) Low speed program execution time setting
The low speed execution type program is operated under the following conditions as shown
below.
• Low speed program execution time
: 3ms
• Total scan execution type program time
: 4ms 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 (0 ms is used to simplify the illustration)
0
END
processing
END
processing
18.5
END
processing
25.5
END
processing
33.5
END
processing
(ms)
4ms
1ms
2ms
4.5ms
1ms
4ms
Low speed scan time
(8ms)
Low speed scan time
(12.5ms)
Low speed END
processing execution
Low speed END
processing execution
Scan execution type program
Low speed execution type program A
Low speed execution type program B
4
11.5
2ms
1ms
1ms
1ms
1ms
Low speed END
processing execution
Low speed scan time
(8ms)
4ms
5ms
3ms
Содержание QCPU (Q Mode)
Страница 111: ...5 19 5 19 MELSEC Q 5 ASSIGNMENT OF I O NUMBERS MEMO ...
Страница 450: ...App 59 App 59 MELSEC Q APPENDICES MEMO ...