5.1.1 External I/O Signals and I/O Numbers
Signals from external input devices are replaced by input numbers, which are determined by
the mounting position (see chapter 3.2.2) and terminal numbers of the input module con
-
nected and are handled in the program.
The outputs (coils) of the program operation results use output numbers which are also deter
-
mined by the mounting position and terminal numbers of the output module with which external
output devices are connected.
The input and outputs are numbered hexadecimal (0, 1, 2 ...9, A, B, C, D, E, F; 10, 11, 12 ...).
Thus I/O signals are grouped into groups with 16 input or outputs
5–2 MITSUBISHI ELECTRIC
Inputs and Outputs Devices in Detail
Base unit
Slot number
Output number
Power
supply
CPU
Input number
Output module
Input module
쐌 The input/output numbers are hexadecimal
starting from 0. The nunbers are shared bet-
ween the inputs and the outputs, with "X"
representing inputs and "Y" outputs. When
there is an input X7 for example, an output Y7
can not exist. (Some special function modules
however form exceptions to this rule.)
쐌 The maximum input/output numbers vary with
the type of CPU.
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