10
DEVICE EXPLANATION
10.2 Internal User Devices
10.2.13 Link register (W)
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10.2.13 Link register (W)
(1) Definition
A link register is the CPU module memory used to refresh the CPU module with data
from the link registers (LW) of intelligent function modules including MELSECNET/H
network module.
Link registers are used to store numeric data (-32768 to 32767, or 0000
H
to FFFF
H
).
(2) Bit configuration of link register
(a) Bit configuration and read and write units
Link registers, which consist of 16 bits per point, read and write data in 16 bit
units.
POINT
1. Link register data are handled as signed data.
For HEX (hexadecimal), 0000
H
to FFFF
H
can be stored. However, since the
most significant bit is a sign bit, the range of a value that can be specified is
-32768 to 32767.
2. When used outside the MELSECNET/H network system's range, link
registers can serve as data registers.
Figure 10.39 Link refresh
Figure 10.40 Bit configuration of link register
Link register
W0
CPU module
Link register
LW0
MELSECNET/H network module
Link refresh
setting range
Link refresh
Wn
b15
to
b0
The most significant bit is sign bit.
