Chapter 6 I/O Specifications

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

 

EH-A23DRP

 

Input

 

X0X12, WX30,WX31

 

Y

Output

 

 

 

 

Bit number

 

 

 

Slot number (X:0 Y:1)

 

 

 

Unit number (0)

 

Bit type

 

 

Y100Y109, WY40

(expansion)

X

Input

 

 

Y

Output

EH-A28EDR

 

 

Bit number

 

 

X1000X1015

 

 

(X:00-07/15 Y:16-21/27)

 

 

 

 

 

Slot number (0)

 

 

 

Unit number (1-4)

 

 

 

 

 

 

 

 

 

Y1016Y1021

Word type

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

(basic/expansion)

WX

 

 

 

 

 

 

 

 

WY

 

 

 

 

 

 

EH-A6EAN (Analog exp.)

 

 

 

 

 

 

 

 

WX201WX204

 

 

 

 

 

 

 

Word number

Slot number

Unit number (1-4)

WY206, WY207

6-4

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Hitachi NJI-350B manual List of external I/O classification and data type, Classification Data type Remarks