1 RUNNING A PROGRAM
1.7 Interrupt Program
75
1
• For I44
If an interrupt factor which is the same as that for the running interrupt program occurs, the factor is not memorized.
Therefore, the corresponding interrupt program will not be executed after the running interrupt program finishes. Also, if the
I44 interrupt program for this cause cannot be executed, SM480 (Cycle overrun flag for inter-module synchronization program
(I44)) is turned on, and SD480 (Number of cycle overrun events for inter-module synchronization cycle program (I44))
reaches its upper limit.
Sc: Inter-module synchronization cycle
(1) The interrupt factor is discarded because the same interrupt (I44) is being executed.
(2) The interrupt is not executed.
(3) The interrupt is executed.
I44
I44
I44
Sc
Sc
t
(1)
(2)
(3)
Main routine program
I44 interrupt program
Summary of Contents for MELSEC iQ-R-R00CPU
Page 2: ......
Page 151: ...9 MONITOR FUNCTION 9 1 Real Time Monitor Function 149 9 MEMO ...
Page 323: ...18 SEQUENCE SCAN SYNCHRONIZATION SAMPLING FUNCTION 321 18 MEMO ...
Page 330: ...328 20 ROUTING SETTING 20 3 Precautions MEMO ...
Page 423: ...26 BASIC CONCEPT 26 8 State Transition of the Redundant System 421 26 MEMO ...
Page 1014: ...1012 APPX Appendix 15 Added and Enhanced Functions MEMO ...
Page 1027: ......