Mitsubishi Electric MELSEC iQ-F Series FX5 User Manual page 33

■When word device memory is read or written
In the word device memory, one word is specified by 16-bit and a specified number of devices starting from specified start
device are expressed in 1-point units in turn from Low byte (L: bit 0 to 7) to High byte (H: bit 8 to 15).
Ex.
When indicating the contents stored in the data registers D350 and D351
(L)
A B 5
b7 b6 b5 b4 b3 b2 b1 b0 b15 b14 b13 b12 b11b10 b9 b8
1 0 1 0 1 0 1 1 0 1 0 1 0 1 1 0 0 0 0 0
5 6 A
b15 b14 b13 b12 b11b10 b9 b8 b7 b6 b5 b4 b3 b2 b1 b0
0 1 0 1 0 1 1 0 1 0 1 0 1 0 1 1 0 0 0 1
Indicates that D350 stores
"56ABH ("22187" in decimal)".
When data other than integer value (real number, character string), is stored in the word device memory for
reading data, the stored value are read as integer value.
(Example 1) When a real number (0.75) is stored in D0 to D1, the value is read as the following integer value.
• D0 = 0000H, D1 = 3F40H
(Example 2) When a character string (12AB) is stored in D2 to D3, the character string is read as the following
integer value.
• D2 = 3231H, D3 = 4241H
Reading and writing extension file registers and buffer memory areas are performed in the same way as those
of the word device memory.
Head Number
Device
device
code
number devices
00015EH 00015EH 0002H 0002H
L - H
5EH 01H 00H 02H 00H
A8H
(H)
(L)
6 0 F
b7 b6 b5 b4 b3 b2 b1 b0 b15 b14 b13 b12 b11b10 b9 b8
1 1 1 1 0 0 0 1 0 1 1 1
B 1 7
b15 b14 b13 b12 b11b10 b9 b8 b7 b6 b5 b4 b3 b2 b1 b0
0 1 1 1 0 0 0 0 1 1 1 1
Indicates that D351 stores
"170FH ("5903" in decimal)".
Data Data
of
56ABH 170FH
L H L H L H
ABH 56H 0FH 17H
(H)
1 7
0 F
1: Indicates ON.
0: Indicates OFF.
3 MESSAGE FORMAT
3.1 Message Format
3
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