What Are I/O Numbers - Mitsubishi Electric MELSEC-Q Series User Manual

5 ASSIGNMENT OF I/O NUMBERS

5.4 What are I/O Numbers?

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I/O numbers are used in sequence program for reception of ON/OFF data at Basic
model QCPU and output of ON/OFF data from Basic model QCPU to outsides.
Input (X) is used for the reception of ON/OFF data at Basic model QCPU. Output (Y)
is used for the output of ON/OFF data from Basic model QCPU.
I/O numbers are expressed as hexadecimals.
When using 16-point I/O modules, I/O numbers are consecutive numbers that 1 slot
has 16 points 0 to
The module that is mounted in the base unit assigns the following:
• For the input module, "X" is assigned at the beginning of the I/O number.
• For the output module, "Y" is assigned at the beginning of the I/O number.
For the case of input module
X 0 0 0 X 0 1 0 X 0 2 0 Y 0 3 0 Y 0 4 0
Power Q00CPU
supply
module
X 0 0 F X 0 1 F X 0 2 F Y 0 3 F Y 0 4 F
16 input
points
F as follows.
For the case of output module
X2C
16 input 16 input 16 output
points points points
MELSEC-Q
16 output
points
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