User`s manual

4
I/O NUMBER ASSIGNMENT
4.3 I/O Assignment by GX Developer
4.3.1 Purpose of I/O assignment by GX Developer
4 - 4
1
Overview
2
Performance Specification
3
Sequence Program Configuration and Execution Conditions
4
I/O Nunber Assignment
5
Memories and Files Handled by CPU Module
6
Functions
7
Communication with Intelligent Function Module
8
Parameters
4.3 I/O Assignment by GX Developer
This section describes the I/O assignment using GX Developer.
4.3.1 Purpose of I/O assignment by GX Developer
Perform I/O assignment setting by GX Developer in the following cases.
(1) Preventing I/O numbers from changing when converting modules
You can avoid the change in the intelligent function module is removed due to a
malfunction.
(2) Changing the I/O numbers to those used in the program
When the designed program's I/O numbers are different from the actual system I/O
numbers, each module's I/O number of base units can be set to program-I/O number.
POINT
1. The I/O assignment setting becomes valid when the PLC is powered OFF
and then ON or the CPU module is reset.
2. If an intelligent function module breaks down without making I/O assignment
settings using GX Developer, it may lead to malfunction of the module,
changing I/O numbers of the modules after the broken one.
Therefore, it is recommended to make I/O assignment setting using GX
Developer.