440
FX
3G
/FX
3U
/FX
3UC
Series Programmable Controllers
Programming Manual - Basic & Applied Instruction Edition
15 External FX I/O Device – FNC 70 to FNC 79
15.6 FNC 75 – ARWS / Arrow Switch
15.6
FNC 75 – ARWS / Arrow Switch
Outline
This instruction inputs data through arrow switches used for shifting the digit and incrementing/decrementing the
numeric value in each digit.
1. Instruction format
2. Set data
3. Applicable devices
S
: "D
.b" cannot be indexed with index registers (V and Z).
Explanation of function and operation
Four arrow switches are connected to the inputs
to
+3, a seven-segment display unit having the BCD
decoder is connected to the outputs
to
+7, and a numeric value is input to
.
1. 16-bit operation (ARWS)
actually stores a 16-bit binary value ranging from 0 to 9999, but the value is expressed in the BCD format in the
explanation below for convenience.
When the command input is set to ON, the ARWS instruction executes the following operation.
Operand Type
Description
Data Type
Head bit device number to be input
Bit
Word device number storing data converted into BCD
16-bit binary
Head bit device (Y) number connected to seven-segment display unit
Bit
n
Number of digits of seven-segment display unit [setting range: K0 to K3]
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
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
3 3 3
3
S
3
3 3 3 3
3
3 3
3
3
3
n
3 3
FNC 75
ARWS
ARWS
16-bit Instruction
9 steps
Mnemonic
Operation Condition
Continuous
Operation
−
32-bit Instruction
Mnemonic
Operation Condition
S
D
1
D
2
S
D
1
D
2
S
S
D
2
D
2
D
1
D
1
Command
input
FNC 75
ARWS
n
D
1
S
D
2