Mitsubishi Electric Melsec QJ71LP21 Reference Manual page 357

7 APPLICATION FUNCTIONS
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POINT
Observe the following precautions when installing multiple network modules with
the same network number to one CPU module:
(1) They cannot be set to the same station number.
(2) Multiple stations cannot be set as control stations.
(3) When using a function such as the link direct device that specifies the
network module by a network No., the execution target is as follows.
Item
Link direct devices
Dedicated instruction
(4) It is necessary to change the settings of the refresh parameters.
1) By default, the refresh range is equally divided for each module. (In this
example shown below, only the range of 1M
FFF
1000
1FFF
2) It is necessary to change the setting so that the entire host send range
(both 1M 1 and 1N
P
Host send range
The module mounted on the slot with the smallest slot No. in
the base unit is targeted.
When the host station is the Universal model QCPU:
The module which is mounted on the slot with the smallest slot
No. in a base unit is targeted.
When the host station is other than the Universal model
QCPU:
The module to which the smallest start I/O address has been
assigned in the I/O assignment tab of the PLC parameter
dialog box is targeted.
1M 1
CPU
P
0 0
1M 1 1M 1
P
P
1N 2 1N 2
S
S
1N 3 1N 3
S S
1N 4
1N 4
S S
FFF
1000
1FFF
3FFF
2) can be refreshed.
S
CPU 1M
0
1M 1
1M
P
1N 2 1N
S
1N 3 1N
S
1N 4 1N
S
1FFF
MELSEC-Q
Description
1 can be transmitted.)
P
1N 2
S
0
1M 1
P
1N 2
S
1N 3
S
1N 4
S
FFF
1000
1FFF
3FFF
1 1N 2
P S
0 0
1 1M 1
P P
2 1N 2
S S
3 1N 3
S S
4 1N 4
S S
1FFF 1FFF
3FFF 3FFF
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