Point Mode Setting And The Number Of Occupied I/O Points Setting - Mitsubishi Melsec-L Series User Manual

6.2
Point Mode Setting and the Number of Occupied I/O
Points Setting
This section describes concepts of the point mode setting and the number of occupied I/O points setting required for
system configuration.
The number of points that the master station can control per remote station occupying one station is set for the point
mode setting.
Three point modes are available: 4-point mode, 8-point mode, and 16-point mode. Even if the number of occupied I/O
points setting is the same, the number of controllable remote stations varies depending on the point mode setting.
Note when connecting a remote device station, use 16-point mode.
(1) Simple setting
The following table lists simple setting for the point mode and the number of occupied I/O points.
According to the number of I/O points of the remote station, set the point mode and the number of occupied I/O
points with reference to the following table.
Number of I/O points of remote
station
256 points or less
257 to 512 points
513 to 1024 points
(2) Advanced setting
The following table lists the point mode and the number of occupied I/O points settings considering the number of
unused points and the number of occupied stations.
• Even if the number of occupied I/O points is the same, the number of controllable remote stations varies
depending on the point mode setting.
The following table lists the number of connectable stations according to the number of occupied I/O points
and point mode settings.
Number of occupied I/O
points setting
4-point mode
Point
mode 8-point mode
setting
16-point mode
If the number of occupied I/O points is set larger than the maximum number of link points in the 4-point mode or 8-point
mode, the excessive I/O points cannot be used.
When the point mode is in the 4-point mode and the number of occupied I/O points is set to 1024
Ex.
According to the setting, the master module can occupy 1024 I/O points in the CPU module. However, the number of
actual link points is 256 (the maximum link points when the 4-point mode is set). The rest of I/O points (768) cannot
be used.
Number of occupied I/O points
setting of the master module
16 pts. 32 pts. 48 pts.
4 stations 8 stations 12 stations 16 stations 32 stations 64 stations 64 stations 64 stations
2 stations 4 stations 6 stations
1 stations 2 stations 3 stations
CHAPTER 6 INSTALLATION AND WIRING
Point mode setting of the master
16 points
32 points
48 points
64 points
128 points
256 points
512 points
1024 points
64 pts. 128 pts. 256 pts.
8 stations 16 stations 32 stations 64 stations 64 stations
4 stations 8 stations 16 stations 32 stations 64 stations
module
4-point mode
8-point mode
16-point mode
512 pts. 1024 pts.
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