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Slave Remote I/O Communications Section 5-1

5-1 Slave Remote I/O Communications

A CS/CJ-series DeviceNet Unit can function as a Slave Unit in remote I/O

communications and a single CS/CJ-series DeviceNet Unit can function as

both a Master Unit and a Slave Unit. This section describes Slave communi-

cations.

Slave Communications

Note 1. In the following descriptions, the areas used to transfer data from the mas-

ter to the slaves are called OUT areas and the areas used to transfer data

from the slaves to the master are called the IN areas.

2. In the following descriptions, a CS/CJ-series DeviceNet Unit set to function

as a master is referred to as a “Master Unit” and a CS/CJ-series DeviceNet

Unit set to function as a slave is referred to as a “Slave Unit”.

5-1-1 Allocation Methods

All slaves are allocated words in the I/O memory of the CPU Unit to which the

Master Unit is mounted. They are allocated using one of the following meth-

ods:

1) Fixed allocations

2) User-set allocations

CS/CJ-series DeviceNet Unit (Master)

CS/CJ-series CPU Unit

IN area

OUT area

IN area

OUT area

Remote I/O communications

DeviceNet

CS/CJ-series CPU Unit

CS/CJ-series DeviceNet Unit (Slave)

Slaves

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Omron CJ1W-DRM21 Manual de usuario Pagina 134