9
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41
9.2.13Link register (W)
(1) Definition
The link register (W) is a memory in the CPU module, which is refreshed with link register (LW) data of an
intelligent function module such as a MELSECNET/H network module.
In the link register, numeric data (-32768 to 32767, or 0000
H
to FFFF
H
) are stored.
(2) Bit structure of the link register
(a) Bit structure and read/write unit
One point of the link register consists of 16 bits, and data can be read or written in units of 16 bits.
Link register data are handled as signed data. In the case of the hexadecimal notation, 0000
H
to FFFF
H
can be stored.
However, because the most significant bit represents a sign bit, decimal values that can be specified are -32768 to 32767.
Figure 9.43 Link refresh
Figure 9.44 Bit structure of the link register
Link register
Link register
W0
LW0
CPU module
MELSECNET/H network module
Link refresh
Link refresh
Wn
b15
to
b0
setting range
