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6.4 What is I/O Number?
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I/O NUMBER ASSIGNMENT
6.4 What is I/O Number?
I/O numbers indicate the addresses used in a user program to input or output ON/OFF
data between the C Controller module and other modules.
(1) Input and output of ON/OFF data
Input (X) is used to input ON/OFF data to the C Controller module, and output (Y) is
used to output ON/OFF data from the C Controller module.
(2) I/O number expressions
I/O numbers are expressed as hexadecimal.
When using 16-point I/O modules, I/O numbers are consecutively assigned to each
slot having 16 points of 0 to F as shown in Figure 6.13.
The module mounted in the base unit is assigned as follows:
• For the input module, "X" is prefixed to the I/O number.
• For the output module, "Y" is prefixed to the I/O number.
Figure 6.13 Input and output numbers
01234
1234
F
0
0F0F0F0F00
000000000
For the case of input
module
For the case of
output module
XXXYY
XXXYY
16 input
points
16 input
points
16 input
points
16 output
points
16 output
points
Power supply
module
C Controller module
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