FX3U Series Programmable Controllers
User’s Manual - Hardware Edition
94
6 Examination of System Configuration
6.3 Number of Input/Output Points and Maximum Number of Input/Output Points
•FX2N-32ASI-M (AS-i master)
Only one FX2N-32ASI-M unit can be connected to a single PLC main unit.
This master cannot be used together with FX3U-16CCL-M and/or FX2N-16CCL-M.
•FX3U-64CCL
Only one FX3U-64CCL unit can be connected to a single PLC main unit.
4 Calculate the total number of input/output points.
Total the number of points counted in Steps 1, 2 and 3, and check that it does not exceed 256
points (maximum number of input/output points).
5 When CC-Link or AS-i master is used, count the remote I/O points.
When CC-Link or AS-i master is used, the total number of input/output points of the remote I/O sta-
tions connected on the network and the number of input/output points calculated in the previous
step are 384 or less.
For details, refer to the following subsection.
1. FX
3U-16CCL-M, FX2N-16CCL-M (CC-Link master)
Calculate the number of remote I/O points connected on the network in the following step.
→ When CC-Link master is used, refer to Subsection 6.3.2.
2. FX2N-32ASI-M (AS-i master)
Calculate the number of remote I/O points connected on the network in the following step.
→ When AS-i master is used, refer to Subsection 6.3.3.
≥
Maximum number of
input/output points
256 points
Maximum number of
points controllable on
system
Number of input/output points
+
Total number of input/output points of input/output powered
extension units and input/output extension blocks
(A): Number of input/output points of main unit
(B): Number of input/output points of input/output
powered extension units
(C): Number of input/output points of input/output
extension blocks
(D): Number of remote I/O points of FX
2N
-64CL-M or FX
2N
-
16LNK-M
(E): Number of special function units/blocks
(A) + (B) (C)+
Number of input/output occupied
points
(E) units
×
8 points
Each special function unit/block
used for FROM/TO instructions
occupies eight input or output
points.
(D)+
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