74
FX
3UC
Series Programmable Controllers
User’s Manual - Hardware Edition
1 Outline
1.15 Assignment of Input/Output Numbers (X/Y)
1.15
Assignment of Input/Output Numbers (X/Y)
When input/output extension blocks are connected to the main unit (CPU), octal numbers are assigned as
input/output numbers (X/Y) when the power is turned ON. Accordingly, it is not usually necessary to specify
input/output numbers using parameters.
It is necessary, however, to assign input/output numbers to the following special extension unit/blocks.
• FX
2N
-64CL-M
• FX
2N
-16LNK-M (Not supported by the FX
3UC
-32MT-LT.)
1.15.1 Rules for input/output number (X/Y) assignment
When the power is turned on, input/output numbers (X/Y) are assigned in accordance with the following rules.
It is assumed that input/output numbers have already been assigned in CONFIG mode for remote I/O units
connected to the FX
3UC
-32MT-LT built-in CC-Link/LT master.
1. Input/output numbers (X/Y) are octal.
Octal numbers are assigned as input/output numbers (X/Y) as shown below.
- X000 to X007, X010 to X017, X020 to X027......, X070 to X077, X100 to X107...
- Y000 to Y007, Y010 to Y017, Y020 to Y027......, Y070 to Y077, Y100 to Y107...
2. Numbers for added input/output unit/block
For each of the input/output extension blocks connected to the right side of the main unit or input/output
extension block, input/output numbers following the input/output numbers on the main unit or extension block
on the left side are assigned respectively. However, the last digit is assigned from "0".
For example, when the input number in the main unit or extension block on the left side ends at X043, input
numbers starting from X050 are assigned to the extension block on the right side. (When the FX
2N
-8ER is
used, unused numbers are generated in input/output numbers.)
3. Input/output numbers in the FX
3UC
-32MT-LT built-in CC-Link/LT master
For each of the remote I/O units connected to the FX
3UC
-32MT-LT built-in CC-Link/LT master, input numbers
(X) and output numbers (Y) are assigned respectively as a continuation from the input and output numbers on
the last input/output extension block
*1
connected to the main unit.
→
Refer to "1.15.3 Example of assigning" on the next page.
→
For input and output numbers in remote I/O units connected to the CC-Link/LT master built in the
FX
3UC
-32MT-LT, refer to Section 9.11.
*1.
When the FX
2N
-64CL-M is connected, input numbers (X) and output numbers (Y) are assigned earlier
in the FX
2N
-64CL-M than remote I/O units connected to the CC-Link/LT built-in master.
1.15.2 Caution
1. When the FX
3UC
-32MT-LT built-in CC-Link/LT master is in CONFIG mode
When the FX
3UC
-32MT-LT built-in CC-Link/LT master is in CONFIG mode, inputs and outputs in remote I/O
stations are not occupied.
Note that input/output extension blocks connected on the right side of the main unit do not operate.
FX
3UC
-32MT/D, /DSS, -LT
X000 to X017
X040 to X043
Y020 to Y023
X020 to X037
(Y024 to Y027:Unused numbers)
(X044 to X047:Unused numbers)
FX
2NC
-CNV-IF
I/O extension
block
FX
2N
-8ER
Input extension
block
FX
2N
-16EX
X050 to X067
Input extension
block
FX
2NC
-16EX
Y000 to Y017
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