Concept Of Control Point (Point Mode Setting And I/O Point Setting); Simplified Setting; Advanced Setting - Mitsubishi MELSEC-Q Series User Manual

3 SPECIFICATIONS

3.4 Concept of Control Point (Point Mode Setting and I/O Point Setting)

3.4.1 Simplified Setting

3.4.2 Advanced Setting

I/O occupied point setting
Point 4-point mode
mode
8-point mode
setting 16-point mode
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This section describes concept of the point mode setting and I/O point setting, which is
required for system configuration.
By the point mode setting, the number of points that the system can control is set to
each remote station.
There are 3 kinds of point modes: 4-point, 8-point and 16-point modes. Even in the
same number setting of the I/O points occupied, the number of controllable remote
stations will vary depending on the point mode setting.
Note that, when connecting a remote device station to the system, use the 16-point
mode.
This section describes simple setting by which a point mode and I/O points occupied
can be set.
According to the I/O points of the remote station, set the proper points and the mode
shown in the following Table.
Remote station I/O points
256 or less
257 to 512 points
513 to 1024 points
This section describes the advanced setting method of the point mode and the I/O
points occupied.
(1) Even if the same I/O points occupied is set, the number of controllable remote
stations varies depending on which point mode is selected.
The table below shows the relation among the I/O point setting, point mode
setting and number of stations that can be connected
16 pts. 32 pts.
4 stations 8 stations 12 stations 16 stations 32 stations 64 stations 64 stations 64 stations
2 stations 4 stations 6 stations 8 stations 16 stations 32 stations 64 stations 64 stations
1 stations 2 stations 3 stations 4 stations 8 stations 16 stations 32 stations 64 stations
POINT
When the number of I/O points occupied is set exceeding the maximum number of
link points in the 4-point or 8-point mode, the excessive I/O points cannot be used.
Example) When setting as follows:
Point mode:4-point mode; No. of I/O point occupied:1024;
The QJ61CL12 occupies 1024 points of I/O for the programmable controller
CPU, however, available link points are 256 (Max. link points for 4-point
mode are 256) and the remaining points of 768 are not possible to be used.
Setting of I/O points occupied for
QJ61CL12
16 points
32 points
64 points
128 points
256 points
512 points
1024 points
48 pts. 64 pts. 128 pts.
MELSEC-Q
Point mode setting for
QJ61CL12
4-point mode
8-point mode
16-point mode
256 pts. 512 pts. 1024 pts.
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