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CHAPTER 6 COMMUNICATIONS AMONG CPU MODULES
6
6.3 Communications Among CPU Modules By Dedicated Instructions
6.3.3 Reading/writing device data between 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
*1 For the Q03UDCPU, Q04UDHCPU, and Q06UDHCPU, the module with a serial number (first five digits) of "10012" or
later must be used.
*2 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
*2
Description
QCPU
Basic model QCPU,
High Performance
model QCPU,
Process CPU
Q00UCPU,
Q01UCPU,
Q02UCPU
Universal model
QCPU (except the
Q00UCPU, Q01UCPU,
and Q02UCPU)
*1
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
D0
D100
D200
D0
Writing