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FX3U Series Programmable Controllers

User’s Manual - Hardwaer Edition

120

7 Assignment of Input/Output Numbers (X/Y) and Unit Numbers

7.2 Unit Numbers of Special Function Units/Blocks

7.2.1 Concept of assigning

When power is turned on, the main unit (CPU) automatically assigns the numbers 0 to 7 to special function

units/blocks starting from the one closest to the main unit.

Unit numbers are not given to input/output powered extension units/blocks.

1. Special function units/blocks connected to main unit

The numbers 0 to 7 are assigned to the special function units/blocks starting from the one closest to the main

unit.

2. FX2N-1RM(-E)-SET

Up to three FX2N-1RM(-E)-SET can be sequentially connected to the end of one system.

All these connected units have the same number as the unit number of the first unit (FX

2N-1RM(-E)-SET).

→ For FX

2N-1RM-E-SET, refer to FX2N-1RM-E-SET USER’S MANUAL.

3. Products to which unit numbers are not assigned

• Input/output powered extension units: FX2N-32ER-ES/UL, FX2N-48ET-ESS/UL, etc.

• Input/output extension blocks: FX

2N-16EX-ES/UL, FX2N-16EYR-ES/UL, etc.

• Special function block: FX

2N-16LNK-M

• Connector conversion adapter: FX

2N-CNV-BC

• Expansion boards: FX

3U-232-BD, etc.

• Special adapters: FX

3U-232ADP, etc.

• Extension power supply unit: FX

3U-1PSU-5V

Mitsubishi FX3U Series User Manual

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