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FX3G/FX3U/FX3UC Series Programmable Controllers
Programming Manual - Basic & Applied Instruction Edition
36 Interrupt Function and Pulse Catch Function
36.5 Timer Interrupt (Interrupt in Constant Cycle)
1. Timer interrupt processing of HKY (FNC 71) instruction
→ For HKY (FNC 71) instruction, refer to Section 15.2.
Step
0
I620
Interrupt
pointer
When interrupt is given every 20 ms
M8000
RUN
monitor
FNC 04
EI
FNC 06
FEND
FNC 50
REF
FNC 71
HKY
FNC 03
IRET
FNC 50
REF
END
Y000 K8
X000 Y000 D0 M0
K8X000
Interrupts are enabled by EI instruction.
The main program is described.
The main program is finished by FEND
instruction.
The latest input information is received
from X000 to X007.
FNC 71 (HKY) is executed in one scan.
Y000 to Y007 are refreshed to the latest
output information.
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