Mitsubishi Electronics FX3G Manuale Utente
434
FX
3S
/FX
3G
/FX
3GC
/FX
3U
/FX
3UC
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 FX
3G
/FX
3GC
/FX
3U
/FX
3UC
PLCs.
S2: This function is supported only in FX
3U
/FX
3UC
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
stant
Real
Number
Charac-
ter String
Pointer
X Y M T C S D .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
n
S
D
S
D
D
D
D
S