Mitsubishi 00JCPU User Manual page 426

(b) Reading
The link device ranges of network modules can be read.
Writing or reading data by using a link direct device is allowed for only one network module that is on the same network.
If two or more network modules are mounted on the same network, a network module with the lowest slot number is the
target of writing or reading by the link direct device.
For example, if network modules set as station numbers 1 and 2 are mounted on network number 1 as shown in Figure 9.55,
station number 2 is the target of the link direct device.
Note4
Note9.4
Basic
A Basic model QCPU and more than one network module cannot be mounted with the same network number.
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Figure 9.55 When two or more network module are mounted on the same network
Note9.4Note4
Network No.1
Writing/reading using link direct devices not allowed
Writing/reading using link direct devices allowed