Mitsubishi Q00JCPU User Manual page 491

9
DEVICE EXPLANATION
(b) When link register is used for 32-bit instruction
(3) Holding of stored data
Data stored by the link register is maintained until another data is save.
The data stored in the link register is initialized when the PLC is powered OFF or the
CPU module is reset.
POINT
If the link registers are used for 32-bit instructions, the data is stored in registers
Wn and Wn + 1. The lower 16 bits of data are stored in the link register No. (Wn)
designated in the sequence program, and the higher 16 bits of data are stored in
the designated register No. + 1 (Wn + 1).
For example, if link register W12 is designated in the DMOV instruction, the lower
16 bits are stored in W12, and the upper 16 bits are stored in W13.
Diagram 9.41 Data transfer by 32-bit instruction and storage destination
Two link registers can store a range of numeric data from -2147483648 to
2147483647 or from 0 to FFFFFFFF
H
configuration is a sign bit.)
The MELSECNET/H network module includes 16384 link register points , while
the Basic model QCPU includes 2048 points (default), and the High Performance
model QCPU, Process CPU and Redundant CPU include 8192 points (default).
When using the link registers after the above points, change the number of link
register points in the device setting of the PLC parameter dialog box.
DMOV K500000 W12
Processing object: W12, W13
W13
Upper 16 bits Lower 16 bits
. (The most significant bit in a 32-bit
H
9.2 Internal User Devices
9.2.13 Link register (W)
9
10
W12
11
9
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