Connecting Data In Byte Units - Mitsubishi Electric MELSEC iQ-F FX5 Programming Manual

Connecting data in byte units

BTOW(P)
These instructions link the lower-order 8 bits of the 16-bit binary data of (n) number of bytes stored in the device numbers
starting from the one specified by (s) onwards into word units, and store the linked data in the device numbers starting from
the one specified by (d) onwards.
Ladder diagram
(s) (d) (n)
FBD/LD
EN ENO
s d
n
Setting data
■Descriptions, ranges, and data types
Operand Description
(s) Head device for storing the data to be linked in byte units
(d) Head device storing data acquired by combination in byte
units
(n) Number of byte data to be linked
EN Execution condition
ENO Execution result
■Applicable devices
Operand Bit
X, Y, M, L, SM,
F, B, SB, S

(s)
(d) 

(n)
Processing details
• These instructions link the lower-order 8 bits of the 16-bit binary data of (n) number of bytes stored in the device numbers
starting from the one specified by (s) onwards, and store the linked data in the device numbers starting from the one
specified by (d) onwards.
• The higher-order 8 bits of the data of (n) words stored in device numbers starting from the one specified by (s) are ignored.
If (n) is an odd number, 0 is stored in the higher-order 8 bits of the device for storing the data of the (n)th byte.
b15
(s)
(s)+1
(s)+2
(n)
(s)+3
(s)+(n-1)
(1)
: th byte data
(1): The upper byte data are ignored.
*1 Values after the decimal point are rounded up.
Word
T, ST, C, D, W, U\G
SD, SW, R
 
 
 
b8 b7 b0
1
2
3
4
n
Structured text
ENO:=BTOW(EN,s,n,d);
ENO:=BTOWP(EN,s,n,d);
Range Data type

16-bit signed binary

16-bit signed binary
0 to 65535 16-bit unsigned binary

Bit

Bit
Double word Indirect
specification
Z LC LZ
   
   
   
b15
(d)
2
(d)+1
4
n
(d)+( -1) *1 n
2
Data type (label)
ANY16
ANY16
ANY16
BOOL
BOOL
Constant Others
K, H E $
   
   
   
b8 b7 b0
1
3
n-1
7 BASIC INSTRUCTIONS
7.5 Data Conversion Instructions
7
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