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FX3S/FX3G/FX3GC/FX3U/FX3UC Series
Programming Manual - Basic & Applied Instruction Edition
15 External FX I/O Device – FNC 70 to FNC 79
15.5 FNC 74 – SEGL / Seven Segment With Latch
15.5 FNC 74 – SEGL / Seven Segment With Latch
Outline
This instruction controls one or two sets of 4-digit seven-segment display units having the latch function.
1. Instruction format
2. Set data
3. Applicable devices
S1: This function is supported only in FX3G/FX3GC/FX3U/FX3UC PLCs.
S2: This function is supported only in FX
3U/FX3UC PLCs.
Explanation of function and operation
1. 16-bit operation (SEGL)
The 4-digit numeric value stored in is converted into BCD data, and each digit is output to the seven-segment
display unit with the BCD decoder by the time division method.
When using one set of 4 digits (n = K0 to K3)
→ For selection of "n", refer to Subsection 15.5.2.
1) Data and strobe signal
A 4-digit numeric value stored in is converted from binary into BCD, and each digit is output in turn from
to +3 by the time division method.
The strobe signal is output in turn from +4 to +7 by the time division method also to latch one set of
4-digit seven-segment display unit.
2) For , binary data ranging from 0 to 9999 is valid.
Operand Type Description Data Type
Head word device converted into the BCD format 16-bit binary
Head Y number to be output Bit
n Parameter number [setting range: K0 (H0) to K7 (H7)] 16-bit binary
Oper-
and
Type
Bit Devices Word Devices Others
System User Digit Specification System User
Special
Unit
Index
Con-
stant
Real
Number
Charac-
ter String
Pointer
XYMTCSD
.b KnX KnY KnM KnS T C D R
U\G
V Z Modify K H E "
"P
S1 S2
n
−
32-bit Instruction
Mnemonic Operation Condition
FNC 74
SEGL
SEGL
16-bit Instruction
7 steps
Mnemonic Operation Condition
Continuous
Operation
S
D
S
D
S
Command
input
FNC 74
SEGL
nS
D
S
D
D
D
D
S