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DEVICE EXPLANATION

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9.2 Internal User Devices

9.2.11 Link register (W)

(b) When link register is used for 32-bit instruction

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.

Two link registers can store a range of numeric data from -2147483648 to

2147483647 or from 0

H to FFFFFFFFH. (The most significant bit in a 32-bit

configuration is a sign bit.)

(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

The MELSECNET/H module includes 16384 link register points , while the CPU

module includes 2048 points (default).

When using the link registers after the above points, change the number of link

Diagram 9.35 Data transfer by 32-bit instruction and storage destination

K500000 W12DMOV

W13

W12

Processing object: W12, W13

Upper 16 bits Lower 16 bits

1 2 ... 181 182 183 184 185 186 187 188 189 190 191 ... 233 234

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