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4 SYSTEM CONFIGURATION
4.3 Limitation on the Number of Input/Output Points
Calculation of number of input/output points
The number of input/output points is the total of the number of input/output points of the CPU module and I/O module, and the
number of occupied input/output points of intelligent function modules.
The total number of input/output points must not exceed 256 points.
Total number of input/output points of the CPU module and I/O modules
Count the total number of input/output points of the CPU module and I/O modules.
To obtain the total number of input/output points, count the input points (X000 and more) and output points (Y000 and more) of
the CPU module and I/O modules.
For details on the number of input/output points by model, refer to the following.
Page 32 CPU Module
Page 33 I/O Module
Number of occupied input/output points of intelligent function modules
Count the number of occupied input/output points of intelligent function modules.
The number of occupied input/output points per module is 8.
For details on the number of occupied input/output points by model, refer to Page 34 Intelligent Function Module.
Calculation of number of remote I/O points
If the master module of the network is used, calculate the number of remote I/O points connected on the network.
The total number of remote I/O points must not exceed 384 points.
The maximum number of remote I/O points differs according to type of the network.
Precautions
Precautions when using CC-Link master (FX3U-16CCL-M) and AnyWireASLINK master (FX3U-128ASL-M) together
When using FX3U-16CCL-M and FX3U-128ASL-M together, connect FX3U-128ASL-M on the left side. In the FX5U CPU
module, FX3U-16CCL-M parameters are set up by PLC program and will occupy up to 256 remote I/O points. Therefore, the
remote I/O points of FX3U-128ASL-M that is connected to the right side may be less than 128 points when FX3U-16CCL-M is
connected to the left side.
Ex.
When input/output points are 160 points and CC-Link master are 256 points: 512 points - 160 points - 256 points = 96 points
Remote I/O points of AnyWireASLINK master are 96 points or less.
≥
256 points
+
(A) + (B) (C) modules ×8 points
=
(1)
Total number of input/output points of CPU
module and I/O modules
(A): Number of input/output points of CPU module
(B): Number of input/output points of I/O modules
(C): Number of Intelligent function modules and bus conversion modules
Intelligent function module,
bus conversion module
occupies 8 input/output points.
Maximum number of
input/output points
Number of
input/output points
Number of input/output points on
CPU module and I/O module
Number of input/output
occupied points
≥
384 points
(a) + (b) points
=
Remote I/O points
(2)
The total number of remote I/O points
in CC-Link and AnyWireASLINK
Maximum number of
remote I/O points
The total number of the remote I/O
points connected on the network
(a): CC-Link remote I/O
(b): AnyWireASLINK remote I/O