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Chapter 6 I/O Specifications
6-4
The following explains the external I/O assignment. The external I/O numbers for the MICRO-EH system are expressed
with the following conventions.
Table 6.6 List of external I/O classification and data type
Classification I/O classification Data type Remarks
X External input Bit type Corresponds to the signal of each terminal block.
WX Word type (16-bit) Data in the range 0 to 15 is batch processed.
16-bit synchronicity guaranteed.
DX Double-word type (32-bit) Two word data are batch expressed.
Lower 16-bit and upper 16-bit synchronicity are
not guaranteed.
Y External output Bit type Corresponds to the signal of each terminal block.
WY Word type (16-bit) Data in the range 0 to 15 is batch processed.
16-bit synchronicity guaranteed.
DY Double-word type (32-bit) Two word data are expressed as one batch.
Lower 16-bit and upper 16-bit synchronicity are
not guaranteed.
Table 6.7 List of I/O number conventions for external I/O
Data type Numbering convention Example
Bit type (basic)
X
Y
Input
Output
Bit number
Slot number (X:0 Y:1)
Unit number (0)
Bit type
(expansion)
X
Y
Input
Output
Bit number
(X:00-07/15 Y:16-21/27)
Slot number (0)
Unit number (1-4)
Word type
(basic/expansion)
WX
WY
Word number
Slot number
Unit number (1-4)
X0～X12, WX30,WX31
Y100～Y109, WY40
X1000～X1015
Y1016～Y1021
WX201～WX204
WY206, WY207
EH-A23DRP
EH-A28EDR
EH-A6EAN (Analog exp.)