197
Interrupt Functions
Section 5-1
Scheduled Interrupt Interval Setting
Note
(1) Set a scheduled interrupt time (interval) that is longer than the time re-
quired to execute the corresponding interrupt task.
(2) If the scheduled time interval is too short, the scheduled interrupt task will
be executed too frequently, which may cause a long cycle time and ad-
versely affect the cyclic task processing.
(3) If an interrupt task is being executed for another interrupt (input interrupt,
high-speed counter interrupt, or external interrupt) when the scheduled
interrupt occurs, the scheduled interrupt will not be executed until the oth-
er interrupt task is completed.
When different kinds of interrupts are being used, design the program to
handle multiple interrupts smoothly. Even if two interrupts occur at the
same time, the scheduled interrupts will continue as programmed, so the
scheduled interrupt tasks will continue to occur at the scheduled times
even if specific scheduled interrupts are delayed.
(4) When using input interrupt or pulse output 2/3 and analog input/output
(XA type only), pay attention to the possibility that timer interrupt cannot
be executed within short time interval.
Writing the Ladder
Program
MSKS(690) Settings
The MSKS(690) instruction must be executed in order to use the scheduled
interrupt. The settings made with MSKS(690) are enabled with just one exe-
cution, so in general execute MSKS(690) in just one cycle using an up-differ-
entiated condition.
@MSKS(690)
N
S
Execution condition
Specifies scheduled interrupt 0 (interrupt task 2).
Sets the scheduled interrupt time interval and
starts timing.
Содержание CP1H CPU UNITS - PROGRAMMING 05-2007
Страница 2: ......
Страница 3: ...CP1H X40D CP1H XA40D CP1H Y20DT D CP1H CPU Unit Operation Manual Revised March 2009...
Страница 4: ...iv...
Страница 10: ...x...
Страница 18: ...xviii...
Страница 22: ...xxii...
Страница 34: ...xxxiv Conformance to EC Directives 6...
Страница 174: ...140 CP series Expansion I O Unit Wiring Section 3 6...
Страница 370: ...336 Analog I O XA CPU Units Section 5 5...
Страница 552: ...518 Trouble Shooting Section 8 7...
Страница 595: ...561 Sample Application Section 9 12 Network Settings Network Tab Network Settings Driver Tab...
Страница 598: ...564 Sample Application Section 9 12...
Страница 642: ...608 Standard Models Appendix A...
Страница 643: ...609 Appendix B Dimensions Diagrams X XA and Y CPU Units 90 100 110 140 150 8 85 Four 4 5 dia holes...
Страница 652: ...618 Dimensions Diagrams Appendix B...
Страница 745: ...711 Connections to Serial Communications Option Boards Appendix F Connecting to Unit...
Страница 746: ...712 Connections to Serial Communications Option Boards Appendix F...
Страница 776: ...742 PLC Setup Appendix G...
Страница 778: ...744 Specifications for External Power Supply Expansion Appendix H...
Страница 786: ...752 Revision History...