Mitsubishi 00JCPU User Manual page 124

(c) Start XY setting
When the start XY has not been entered, the CPU module automatically assigns it. The CPU module
automatically assigns the start XY if it is not set. For this reason, the start XY setting of each slot may be
duplicated with the one assigned by the CPU module in the case of 1) or 2) below.
1) Start XY values are not in the correct order.
2) Slots with and without the start XY setting (automatically assigned slot) are mixed
An example of start XY duplication is given in Figure 4.9 below.
Do not set duplicated start XY for each slot.
Specify start XY in the additional module to prevent the duplication of start XY.
(Example: Input "0060" to "start XY" in slot2.)
In the High Performance model QCPU and Process CPU, mounting the slot for duplication of start XY to
modules will result in "SP. UNIT LAY ERR."
In the Basic model QCPU and Redundant CPU, duplication of start XY will result in "SP. UNIT LAY ERR." (An
error occurs even the module is not mounted.)
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Figure 4.9 assignment setting with start XY duplication
0
32 points 32 points 32 points
X40 X20
to
X5F X3F X5F
Start XYs are overlapped
Figure 4.10 Start XY set by above (Figure 4.9) I/O assignment
Automatically assigned slot
1 2 Slot number
Number of I/O points
X40
I/O number
to to