Automatic Assignment Of I/O Numbers; Extension Equipment Types And I/O Number Assignment Order - Mitsubishi FX3UC SERIES User Manual

FX Series Programmable Controllers
3UC
User's Manual - Hardware Edition

9.11.3 Automatic assignment of I/O numbers

The I/O numbers can be assigned automatically in CONFIG mode.
Parameter settings and sequence programs are not necessary for this assignment.
Operating procedure
Execute the steps 1) to 5) below to assign the I/O numbers automatically.
1
Connect each remote I/O unit to the built-in master.
2
Set to CONFIG mode
Set the DIP switch 6 to ON and DIP switch 7 to OFF (CONFIG mode) in the FX
3
Turn the power ON
Turn ON the power supply adapter (or dedicated power supply) and then the FX
this order).
The built-in master collects information (types and numbers of I/O) on connected remote stations,
and stores the collected information in the buffer memory [BFM #32 (20h) to #95 (5Fh)] and built-in
memory (EEPROM).
4
Check the remote I/O unit connection status.
Confirm that the contents of the buffer memory [BFM #32 (20h) to #95 (5Fh)] are consistent with
the actual system configuration.
5
Change the operation mode to "ONLINE", and start the PLC again (power
OFF → ON).
Set the DIP switch 6 to OFF (and leave the DIP switch 7 in OFF) in the FX
ON the power of the PLC again.
When a power supply adapter or dedicated power supply is used, turn ON the power in the order
"Power supply adapter (or dedicated power supply) → PLC (built-in master)".
The FX -32MT-LT reads information on connected remote stations from the built-in memory
3UC
(EEPROM), and assigns the I/O number.

9.11.4 Extension equipment types and I/O number assignment order

1. Rule of assignment order
I/O numbers are automatically assigned consecutively from the main unit (built-in unit).
I/O numbers are always assigned at the end to the remote I/O unit connected to the CC-Link/LT built-in
master as shown below.
1
FX -32MT-LT
3UC
Input/output
Assignment
order
2
• I/O extension blocks • Remote I/O unit
• Remote I/O unit connected to CC-
connected to FX - Link/LT built-in
2N
64CL-M
Up to 256 points
9 CC-Link/LT Built-in master ability (Only FX3UC-32MT-LT)
3
Extendable range
master
9.11 Assignment of I/O numbers
-32MT-LT.
3UC
-32MT-LT (in
3UC
-32MT-LT, and turn
3UC
"256 points" - "Number of I/O
occupied points"
Special function
devices
(including 8 points in
FX -64CL-M)
2N
Number of I/O
occupied points
291
1
2
3
4
5
6
7
8
9
10