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6F3B0250
Basic Hardware and Function
107
6. Programming Information
6.4 I/O allocation
The external input signals are allocated to the external input devices/registers (X/XW).
The external output signals are allocated to the external output devices/registers (Y/YW).
The register numbers of the external input and output registers are consecutive. Thus
one register number can be assigned for either input or output.
As for the T1/T1S basic unit, I/O allocation is fixed as follows.
X000 X007
Inputs: 8 points (X000 - X007)
T1-16
Outputs: 8 points (Y020 - Y027)
Y020 Y027
X000 X00D
Inputs: 14 points (X000 - X00D)
T1-28
Outputs: 14 points (Y020 - Y02D)
Y020 Y02D
X000 X017
Inputs: 24 points (X000 - X017)
T1-40 / T1-40S
Outputs: 16 points (Y020 - Y02F)
Y020 Y02F
Any operation for the I/O allocation are not required if only the T1/T1S basic unit is used.
However, if the option cards, the Expansion unit and/or the T2 I/O modules are used with
the T1-40/T1-40S, the I/O allocation operation is necessary. For this information, refer to
the separate manual for Expansion I/O.
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