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4.13 Interrupt from Intelligent Function Module
4
FUNCTIONS
(b) Restarting a user program
This section explains how to restart a user program which is in the interrupt event
waiting status by the QBF_WaitUnitEvent function.
1) In the user program, call the QBF_WaitUnitEvent function.
2) The user program is placed into the interrupt event waiting status by 1).
3) An interrupt from the intelligent function module or interrupt module is issued in
the status of 2).
4) The user program receives an interrupt event by 3) and restarts.
(c) Operation timing
Figure 4.20 Restarting a user program
Figure 4.21 Operation timing
(User program)
C Controller module
3) Interrupt issue
1) QBF_WaitUnitEvent function
2) Waiting for an interrupt event
4) User program resumed
Interrupt event notification
Intelligent function module or
interrupt module
C Controller module interrupt
routine (interrupt program)
C Controller module user
program
Interrupt issued
ON
User program resumed
OFF
Interrupt event in waiting status by user program
QBF_WaitUnitEvent function
executed
Interruput event notified
*1
Interrupt routine (interrupt
program) executed
Interrupt routine (interrupt program)
in waiting status
*1 Interrupt event notified after the interrupt routine (interrupt program) ends.
Interrupt routine (interrupt program) in waiting status
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