Mitsubishi Electric MELSEC FX3U Programming Manual page 159

FX /FX /FX Series Programmable Controllers
3G 3U 3UC
Programming Manual - Basic & Applied Instruction Edition
Operations
Step
0
Pointer for
interrupt
I010
FNC 04
EI
M8000
C255
K2,147,483,647
RUN
monitor
FNC 53
DHSCS K1000 C255
FNC 06
FEND
Counter interrupt is specified
Interrupt routine
(interrupt program)
FNC 03
Interrupt return
IRET
END
•
Enable interrupt after EI instruction, and
describe the main program.
•
Drive the coil of a high speed counter, and
specify an interrupt pointer in DHSCS (FNC 53)
instruction.
I010
•
When the current value of C255 changes from
"999" to "1000" or from "1001" to "1000", the
interrupt routine is executed.
Interrupt pointer
For example of interrupt program, refer to an
number is
input interrupt described above.
specified
4 Devices in Detail
4.12 Pointer [P and I]
1
2
3
4
5
6
7
8
9
10
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