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FX3G/FX3U/FX3UC Series Programmable Controllers
Programming Manual - Basic & Applied Instruction Edition
15 External FX I/O Device – FNC 70 to FNC 79
15. External FX I/O Device – FNC 70 to FNC 79
FNC 70 to FNC 79 provide instructions to receive data from and send data to external devices mainly using inputs and
outputs in PLCs.
Because these instructions easily achieve complicated controls with a minimum required sequence program and
external wiring, they are similar to handy instructions described in the preceding chapter.
FROM and TO instructions essential for controlling special units and special blocks are included in this group. (In
FX
3U and FX3UC PLCs, transfer can be executed also by MOV instruction.)
FNC No. Mnemonic Symbol Function Reference
70 TKY Ten Key Input Section 15.1
71 HKY Hexadecimal Input Section 15.2
72 DSW Digital switch (thumbwheel input) Section 15.3
73 SEGD Seven Segment Decoder Section 15.4
74 SEGL Seven Segment With Latch Section 15.5
75 ARWS Arrow Switch Section 15.6
76 ASC ASCII code data input Section 15.7
77 PR Print (ASCII Code) Section 15.8
78 FROM Read From A Special Function Block Section 15.9
79 TO Write To A Special Function Block
Section
15.10
TKY D1 D2S
D3HKY D2D1S
nDSW D2D1S
DSSEGD
SEGL D nS
n
ARWS
D2D1S
DASC S
DSPR
n
FROM
Dm2m1
nTO Sm2m1