Mitsubishi Electric MELSEC-Q00U(J)CPU

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CHAPTER 2 APPLICATION OF PROGRAMMING
2
2.3 I/O Number Assignment
2.3 I/O Number Assignment
The I/O number indicates addresses used for sequence programs in the following cases.
• Input of on/off data to the CPU module
• Output of on/off data from the CPU module to the external device
(1) Input and output of on/off data
The input (X) is used to input on/off data to the CPU module, and the output (Y) is used to output on/off data from
the CPU module.
(2) I/O number representation
The I/O numbers are represented in hexadecimal. When a 16-point I/O module is used, the I/O number for each
slot will be 16 point-sequence number from 
0 to  F as shown in the following figure. "X" and "Y" is
prefixed to the I/O number of input modules and the I/O number of output modules, respectively.
CPU module
Power supply module
For the case of input
module
For the case of
output module
16 input
points
16 input
points
16 input
points
16 output
points
16 output
points
XXXYY
XXXYY
01234
12
34
F
0
0F0F0F0F00
000000000