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5. I/O NUMBER ASSIGNMENT
The CPU module performs the following processing when I/O assignment is set.
1) Any of the following assignment can be performed per slot of each base unit.
2) The slots for which I/O assignment has been performed with GPP function,
the I/O assignment setting takes priority regardless of the loaded module.
• If a number of points fewer than the that of the loaded I/O module is set, the
actual number of points of the loaded I/O module is reduced.
For example, if the loaded module is a 32-point input module but I/O
assignment is set for a 16-point input module using GPP function, the latter
16 points for the input module cannot be used.
• If a number of points is greater than the that of the loaded I/O module is
set, the number of points in excess of the actual number of points is
occupied with dummy points.
• If the slot where an I/O module is loaded is set as a empty slot, the I/O
module will be unusable.
3) The slots for which I/O assignment is not performed using GPP function are
assigned with the number of points of the loaded module.
4) The slots for which I/O assignment is not performed using GPP function are
assigned I/O numbers that are consecutive to those of modules for which I/O
assignment has been performed.
(3) Precautions
(a) If there is a disparity between the I/O assignment made in the parameter settings
and the actually loaded I/O modules, the input and output is not normally
performed.
Assigned number of points
Empty slot Input module Output module
Special function
module
0–––
16 16 16 16
32 32 32 32
48 48 48 48
64 64 64 64
Loaded module I/O assignment Result
Input Output No input
Output Input No output
Input/Output Special CPU module error
Special Input/Output CPU module error
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