7-87
WTOB(P),BTOW(P)
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7.5 Data processing instructions
7.5.9 Data dissociation and linking in byte units (WTOB(P),BTOW(P))
(4) The upper 8 bits of the byte storage device designated by are ignored, and the lower 8
bits are used.
(5) Linking is correctly processed even when the device range ( to +(n-1)) where the data
to be linked is stored overlaps with the device range ( to +( -1)) where the linked data
will be stored.
For example, the following will take place in a case where the lower 8 bits of D11 to D16 are
to be stored at D12 to D14:
Operation Error
(1) In any of the following cases, an operation error occurs, the error flag (SM0) turns ON, and
an error code is stored into SD0.
• The ran ge of the number of bytes designated by n following the device number
designated by exceeds the relevant device range. (Error code: 4101)
• The ran ge of the number of bytes designated by n following the device number
designated by exceeds the relevant device range. (Error code: 4101)
Program Example
(1) The following program dissociates the data at D10 to D12 in byte units and stores it at D20
to D25 when X0 is turned ON.
[Ladder Mode] [List Mode]
[Operation]
S
S S
D D n
2
D12
31H
00H
31H
32H
33H
34H
D11
D13
D12
D14
31H
32H
33H
34H
36H
D13
D16
00H
00H
00H
00H
00H
35H
00H
D15
D11
35H
36H
35H
00H
36H
00H
D14
D15
D16
b15 b8b7 b0 b15 b8b7 b0
S
D
Step Instruction Device
58H
FDH
E2H
57H
44H
34H
D11
D12
58H
00H
FDH
00H
E2H
00H
57
H
00H
34H
00H
44H
00H
D21
D22
D23
D25
D10
D24
D20
6 bytes
b8 b0 b8 b0b15 b7
b7b15