Mitsubishi Electric Melsec QJ71LP21 Reference Manual page 313

7 APPLICATION FUNCTIONS
QCPU
ZNRD
instruction
request
source
D200
D201
D202
D203
D204
QCPU
D10
D11
D12
D13
ZNRD
instruction
D14
target station
7 - 89
(c) Program example 1 (When a system other than the redundant system is
the target system)
The program examples shown below are programmed for the following
system configuration.
When actually using the programs below, provide interlocks in the program
referring to Section 6.1.
Station No. 1
QJ71
QX40 QY40P
LP21
Channel1
Network No. 1
QJ71
QX40 QY40P
LP21
Station No. 4
1) ZNRD instruction
The following program reads the contents of D10 to D14 of station
number 4 to D200 to D204 of station number 1.
2) ZNWR instruction
The following program writes the contents of D300 to D303 of station
number 2 to D50 to D53 of station number 3.
QCPU
ZNWR
instruction
request
source
D300
D301
D302
D303
QCPU
D50
D51
D52
D53
ZNWR
instruction
target station
MELSEC-Q
Station No. 2
QJ71
QX40 QY40P
LP21
Channel2
QJ71
QX40 QY40P
LP21
Station No. 3
7 - 89