Mitsubishi MELSEC-Q Series User Manual page 232

6
I/O NUMBER ASSIGNMENT
6
- 23 6.6 I/O Assignment by C Controller Setting Utility
6.6.2 Details of I/O assignment by C Controller setting utility
(b) Precautions for automatic start XY assignment by C Controller module
When the start XY has not yet entered, the C Controller 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 C Controller module.
1) I/O numbers are reversed 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 6.17 shows overlapping start XY.
Figure 6.17 I/O assignment with overlapping start XY
Be extremely careful not to overlap the start XY of each slot.
Overlapping the start XY will result in an intelligent function module assignment
error (error code: 2107, SP.UNIT LAY ERR.).
0 1
32 32 32
points points points
X40 X20 X40
to to
X5F X3F X5F
Start XY overlaps!
Figure 6.18 Start XY set by above I/O assignment
Automatically
assigned slot
Slot number
2
Number of I/O points
I/O number
to