Interrupts By The Link Special Device (Sb/Sw) - Mitsubishi Electric Melsec QJ71LP21 Reference Manual

7 APPLICATION FUNCTIONS

7.5.4 Interrupts by the link special device (SB/SW)

CPU
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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.
SB 49
[Interrupt pointer settings]
CPU side
Interrupt pointer start
Interrupt pointer count
No.
51
Network module
Station No. 3
SB0049
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.
Detection Interrupt
method condition
Edge detection On
1
Network module
Station No. 15
SB0049
Data link error
Network No. 7
Word device Channel No./
setting value connection No.
Intelligent module side
Start I/O No. Start SI No.
0000 0
CPU
SB
SM400
I51
MELSEC-Q
Interrupt (SI) No.
0
Reception
processing
IRET
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