Mitsubishi Electric MELSEC-Q Series User Manual page 54

*1 Areas in RWr and RWw are occupied for the number of points of the remote I/O station in the master station and local
station. When areas in RWr and RWw should not be occupied, use the remote net Ver.2 mode. (
3.6.4)
*2 The last two bits in RX and RY cannot be used for communications between a master station and a local station.
● The assignment of RX, RY, RWr, and RWw in a Ver.1-compatible slave station is the same as that in the remote net Ver.1
mode; therefore, a program that has been used in the remote net Ver.1 mode can be used.
• Buffer memory addresses where RX, RY, RWr, and RWw are stored are Ver.1-compatible areas.
• A remote I/O station does not have RWr or RWw. However, areas in RWr and RWw of the master station and a
local station are occupied for the number of points of a remote I/O station.
● In the remote net additional mode, add a Ver.2-compatible slave station (including a local station in the remote net
additional mode) to a station number after a Ver.1-compatible slave station. When there is a possibility to add a Ver.1-
compatible slave station in future, set a reserved station at the end of the Ver.1-compatible slave station.
To add a station number of a Ver.2-compatible slave station between station numbers of a Ver.1-compatible slave
station, use the remote net Ver.2 mode.
● In a system where a standby master station is used, changing the mode to the remote net Ver.2 mode is recommended.
In the remote net additional mode, the storage locations of RX, RY, RWr, and RWw differ between a Ver.1-compatible
slave station and a Ver.2-compatible slave station; therefore, changing a program for a standby master station is
required.
(1) Points per module and per system
For the points, refer to the table of the performance specifications. (
In CC-Link, increasing the number of occupied stations and setting the greater value in the expanded cyclic
setting can increase the number of points. Set the number of occupied stations and expanded cyclic setting for
each slave station. (
Number of Occupied Stations
Expanded Cyclic Setting (CC-Link Ver.2 only)
52
Page 102, Section 7.3.2 (2), Page 118, Section 7.4.2 (1))
Item
Page 24, Section 3.2)
The number of points is increased by increasing the station numbers
occupied per module.
Note that the number of slave stations that can be connected to a CC-
Link system is decreased because one module occupies the station
numbers for multiple modules.
The station numbers occupied by one module are not changed, and only
the number of points is increased.
Unlike "Number of Occupied Stations", the number of slave stations
connected to a CC-Link system is not decreased. Note, however, that
the transmission delay time is extended compared to that of when the
number of points is increased in "Number of Occupied Stations".
Page 48, Section
Description