Mitsubishi Electric MELSEC iQ-F FX5 User Manual page 35

■If the same interrupt cause occurs while the interrupt program is being executed
• For I0 to I23 and I50 to I177
The interrupt cause that occured is memorized, and the interrupt program corresponding to the cause will be executed after
the running interrupt program finishes. Even if the same interrupt cause occurs multiple times, it will be memorized only once.
I0 I0
Main routine program
I0 interrupt program
After the interruption being executed is completed,
the first interrupt program is executed.
• For I28 to I31
The interrupt cause is memorized, and the interrupt program corresponding to the cause will be executed after the running
interrupt program finishes. If the same interrupt factor occurs multiple times, it will be memorized once but operation at the
second and later occurrences depends on setting of the fixed scan execution mode. (Page 23 Fixed scan execution
mode)
When "Execution Count Takes Priority" is enabled, the interrupt program corresponding to the memorized interrupt cause will
be executed after the running interrupt program finishes. When "Precede Fixed Scan" is enabled, the second and later
occurrences will not be memorized.
I31 I31
Main routine program
I31 interrupt program
Setting the interrupt cycle
Set the interrupt cycle of interrupts I28 to I31 using the internal timer of the interrupt pointer.
Navigation window  [Parameter]  [FX5UCPU]  [CPU Parameter]  "Interrupt Settings"  "Fixed Scan Interval
Setting"
Window
Displayed items
Item
Interrupt Setting from Internal
Timer
The second and following interrupt causes, which
I0
occur while an interruption executed, are not saved.
The second and following interruption causes, which occur while an interruption
I31
is executed, operate according to the setting of the fixed scan execution mode.
When "Precede Fixed Scan" is set
When "Execution Count
The second interruption
Takes Priority" is set
is not executed.
The second interruption is executed.
Description
I28 Sets the execution interval of I28.
I29 Sets the execution interval of I29.
I30 Sets the execution interval of I30.
I31 Sets the execution interval of I31.
Time
Time
Setting range
1 to 60000 ms (1 ms units)
1 to 60000 ms (1 ms units)
1 to 60000 ms (1 ms units)
1 to 60000 ms (1 ms units)
1 PROGRAM EXECUTION
1.5 Program Type
1
Default
100 ms
40 ms
20 ms
10 ms
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