Mitsubishi Electric Melsec QJ71LP21 - Interrupts by the Link Special Device (SB;SW)

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MELSEC-Q
7 APPLICATION FUNCTIONS
7.5.4 Interrupts by the link special device (SB/SW)
The specified interrupt sequence program can be executed when the conditions of the
control information (SB/SW) during data linking match.
In the example below, specify the interrupt setting parameters for station number 15 so
that the interrupt program is started when SB0049 turns on (data link error occurred).
[Interrupt setting parameters]
Device code Device No.
Detection
method
Interrupt
condition
Word device
setting value
Channel No./
connection No.
Interrupt (SI) No.
SB 49 Edge detection On 0
[Interrupt pointer settings]
CPU side Intelligent module side
Interrupt pointer start
No.
Interrupt pointer count Start I/O No. Start SI No.
51 1 0000 0
REMARKS
(1) When the sequence program executes at high speed, the scan time may take
longer because the execution time of the interrupt program affects the
performance of the interrupt program.
(2) When multiple interrupts occur at the same time, the operation delay may
occur.
(3) This function cannot be used during offline or online testing.
CPU
Network module
Station No. 3
CPU
Network module
Station No. 15
Network No. 7
Reception
processing
IRET
I51
SB0049 SB0049
Data link error
SB
SM400