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CHAPTER 6 COMMUNICATIONS AMONG CPU MODULES

6.3 C

ommunications Among CPU Modu

les By D

edicated

Instr

uctions

6.3.3 R

eading/writing device data b

etween QCPUs

6.3.3

Reading/writing device data between QCPUs

The Universal model QCPU can read/write device data from/to another Universal model QCPU by executing the
multiple CPU high-speed transmission dedicated instructions listed below.

: Available, ×: Not available

For the Q03UDCPU, Q04UDHCPU, and Q06UDHCPU, the module with a serial number (first five digits) of "10012" or
later must be used.

For details on the multiple CPU high-speed transmission dedicated instructions, refer to the following.

MELSEC-Q/L Programming Manual (Common Instruction)

The following is the operation to write device data in CPU No.1 to the device of CPU No.2 by executing the DP.DDWR
instruction.

Instruction

Description

QCPU

Basic model QCPU,

High Performance

model QCPU,

Process CPU

Q00UCPU,
Q01UCPU,

Q02UCPU

Universal model

QCPU (except the

Q00UCPU, Q01UCPU,

and Q02UCPU)

D.DDRD,
DP.DDRD

Loads device data in other CPU modules to
the devices in the host CPU module.

D.DDWR,
DP.DDWR

Writes device data in the host CPU module
to the devices in other CPU modules.

Program

DP.DDWR U3EI D0 D100 D200 M0

CPU No.1

CPU No.2

D100

D200

Writing