I/O Signal List - Mitsubishi Melsec-L Series User Manual

3.3

I/O Signal List

This section describes I/O signals of the master module for the CPU module.
Input signals (X) are assigned to the remote input area, and output signals (Y) are assigned to the remote output area.
No special I/O signal is required to operate the master module.
I/O assignments vary depending on the point mode setting.
"n" in the following tables indicates the start I/O number of the master module.
When the start I/O number of the master module is "X/Y30"
Ex.
Xn0 to XnF→X30 to X3F
Yn0 to YnF→Y30 to Y3F
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.
● If remote station numbers are duplicated, the duplicating stations may cause malfunction (incorrect input/output).
Check that the remote station numbers are not duplicated before powering on the system.
● A remote station may occupy multiple station numbers depending on the point mode setting and the number of I/O points
of the remote station.
When using a remote station having the number of I/O points of eight or more, check that the station number of the
remote station is not duplicated with that of the next station.
(1) In 4-point mode
The following tables list I/O signals in 4-point mode.
Input number
XnF to Xn0
X(n+F)F to X(n+F)0
Output number
YnF to Yn0
Y(n+F)F to Y(n+F)0
20
F E D C B A
Station No.4 Station No.3
Station No.64 Station No.63
F E D C B A
Station No.4 Station No.3
Station No.64 Station No.63
Remote input (X)
9 8 7 6 5
Station No.2
Station No.62
Remote output (Y)
9 8 7 6 5
Station No.2
Station No.62
4 3 2 1 0
Station No.1
Station No.61
4 3 2 1 0
Station No.1
Station No.61