4
I/O NUMBER ASSIGNMENT
4.7 I/O Assignment Using GX Developer
4.7.2 Concept of I/O assignment using GX Developer
4 - 29
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 using
built-in Ethernet ports of
CPU module
8
Communication with
Intelligent Function
Module
(b) Precautions for automatic start XY assignment by CPU module
When the start XY is not yet entered, the CPU module automatically assigns it. In
the case of 1) or 2) below, therefore, the start XY setting of each slot may overlap
the one assigned by the CPU module.
1) Settings of I/O numbers were exchanged in the start XY
2) There are slots with start XY setting and those without start XY setting
(automatically assigned slot)
The following example Figure 4.22 shows overlapping start XY.
Be extremely careful not to overlap the start XY of each slot.
Overlapping start XY will result in an error ("SP. UNIT LAY ERR.").
Figure 4.22 I/O assignment with overlapping start XY
Figure 4.23 Start XY set by above I/O assignment
Input module
Input module
Additional
module
32
points
32
points
32
points
012
X40 X20 X40
Number of I/O points
Slot number
Automatically
assigned slot
Start XY overlaps!
I/O number
X5F X3F X5F
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