Receiving Explicit Messages

 

 

Section 6-5

I/O Memory Read/Write for CPU Units

 

 

 

 

 

 

 

 

 

Service

Service

Class ID

Instance ID

Request

Contents

 

code

 

 

service

 

 

 

 

 

data

 

 

 

 

 

 

 

Byte Data Read

IC Hex

2F Hex

Specifies

Address, No.

Reads the specified node data in byte units.

 

 

 

area (01 Hex

of read bytes

The word data is read in order, from high to

 

 

 

to 14 Hex)

 

low bytes.

 

 

 

 

 

Read data: 200 bytes max.

 

 

 

 

 

 

Word Data

ID Hex

 

 

Address, No.

Reads the specified node data in word

Read

 

 

 

of read

units. The word data is read in order, from

 

 

 

 

words

high to low bytes.

 

 

 

 

 

Read data: 200 bytes max.

 

 

 

 

 

 

Byte Data Write

IE Hex

 

 

Address,

Writes the specified node data in byte units.

 

 

 

 

word data

The word data is specified in order, from

 

 

 

 

 

high to low bytes.

 

 

 

 

 

Write data: 200 bytes max.

 

 

 

 

 

 

Word Data Write

IF Hex

 

 

Address

Writes the specified node data in word

 

 

 

 

word data

units. The word data is specified in order,

 

 

 

 

 

from high to low bytes.

 

 

 

 

 

Write data: 200 bytes max.

 

 

 

 

 

 

The commands and responses for the explicit messages that can be sent and received are described on the following pages.

Note In the following command and response formats, all boxes repre- sents 1 byte.

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Omron CS1W-DRM21, CJ1W-DRM21 Memory Read/Write for CPU Units, Service Class ID Instance ID Request Contents Code Data