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4 SYSTEM CONFIGURATION
4.6 Numbers and Assignment in System
4.6 Numbers and Assignment in System
Input/output numbers and module numbers in an FX5U CPU module system are explained.
Module input/output number
The input/output numbers are octal numbers. Input is assigned to "X" and output to "Y."
Input/output numbers are used for communication of ON/OFF data between I/O modules and the CPU module.
• Input/output numbers (X/Y) are octal.
Input/output numbers (X/Y) are automatically assigned 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, ...
• Numbers for added I/O module
To an added I/O module, input numbers and output numbers following the input numbers and output numbers given to the
preceding device are assigned. The last digit of the assigned numbers must begin with 0.
Module number of Extension modules
The CPU module automatically assigns numbers (1 to 16) to intelligent function modules or bus conversion module as module
numbers in order of distance from the CPU module.
• Intelligent function modules or bus conversion module connected to the CPU module
Module numbers are assigned to intelligent function modules in order of distance from the CPU module: No. 1 to No. 16.
• Products to which module numbers are not assigned
Module numbers are not assigned to the following extension devices.
Ex.
• I/O module FX5-16EX/ES, FX5-16EYT/ES, etc.
• Expansion board FX5-232-BD, FX5-485-BD, etc.
• Expansion adapter FX5-232ADP, FX5-485ADP, etc.
• Extension power supply module FX5-1PSU-5V, FX3U-1PSU-5V
CPU module
No.3No.1
Module No.
No.4
Expansion
adapters
FX5-232ADP
Input module
FX5-16EX/ES
Output module
FX5-16EYT/ES
FX3
Intelligent
module
FX3U-1PG
FX5
Intelligent
module
FX5-40SSC-S
FX3
Intelligent
module
FX3U-4AD
No.2
Bus
conversion
module
Expansion
board