Mitsubishi Electronics FX3G User Manual
534
FX
3S
/FX
3G
/FX
3GC
/FX
3U
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3UC
Series
Programming Manual - Basic & Applied Instruction Edition
19 Data Operation 2 – FNC140 to FNC149
19.2 FNC141 – WTOB / WORD to BYTE
19.2
FNC141 – WTOB / WORD to BYTE
Outline
This instruction separates consecutive 16-bit data in byte units (8 bits).
1. Instruction format
2. Set data
3. Applicable devices
Explanation of function and operation
1. 16-bit operation (WTOB and WTOBP)
1) "n/2" 16-bit data stored in
and later is separated into "n" bytes, and stored in "n" devices starting from
as shown below.
2) "00H" is stored in the high-order byte (8 bits) of each device (
and later) storing the separated byte data.
Operand type
Description
Data type
Head device number storing data to be separated in byte units
16-bit binary
Head device number storing result of separation in byte units
n
Number of byte data to be separated (0
≤ n)
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
n
P
FNC 141
WTOB
−
−
−
Mnemonic
Operation Condition
16-bit Instruction
7 steps WTOB
WTOBP
Mnemonic
Operation Condition
Continuous
Operation
Pulse (Single)
Pulse (Single)
Operation
32-bit Instruction
S
D
S
D
S
D
Command
input
FNC141
WTOBP
WTOBP
S
D
n
b15
b8 b7
b0
S
+0
+1
+1
+n/2
...
*1
*1 When "n" is an odd number, "n/2" is
rounded up.
When "n" is "5", for example, "
+3" is used.
When "n" is "5", for example, "
+3" is used.
D
+0
+1
+1
...
"00H" is stored.
+2
+3
+3
+n-2
+n-1
+n-1
"n" bytes
High-order byte
High-order byte
High-order byte
High-order byte
Low-order byte
Low-order byte
Low-order byte
Low-order byte
00H
00H
00H
Low-order byte
High-order byte
00H
00H
00H
Low-order byte
High-order byte
00H
00H
00H
Low-order byte
High-order byte
...
...
b15
b8 b7
b0
S
D