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CHAPTER 2 APPLICATION OF PROGRAMMING
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2.3 I/O Number Assignment
2.3.1 Concept of I/O number assignment
(2) I/O assignment on a remote I/O stations
The devices of input (X) and output (Y) in the CPU module can be assigned to I/O modules and intelligent
function modules, which allows to control the modules in the remote I/O system such as CC-Link IE Field
Network, MELSECNET/H remote I/O network and CC-Link.
Also, the input (X) and output (Y) devices can be used as refresh-target devices for the link I/O (LX, LY) of CC-
Link IE Field Network master/local modules and MELSECNET/H modules.
(a) I/O numbers available on remote I/O stations
When the input (X) and output (Y) of the CPU module are used for the I/O numbers in the remote
station, assign the I/O numbers later than those used for the I/O modules and intelligent function
modules on the CPU module side.
When X/Y0 to X/Y3FF (1024 points) are used for the I/O modules and intelligent function modules on the
CPU module side, X/Y400 and later can be used in the remote stations.
MELSECNET/H remote I/O network
CC-Link moduleCPU module
MELSECNET/H module
X40 to 5F
X60 to 7F
Y80 to 9F
X500 to 51F
X520 to 53F
X540 to 55F
X560 to 57F
580 to 59F
Remote
station
Remote
station
X 0 to F: Input module
Y 0 to F: Output module
0 to F: Intelligent function module
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