Omron CS1W-DRM21 Slave Remote I/O Communications, Allocation Methods, Slave Communications

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

CS/CJ-series DeviceNet Unit (Master)
CS/CJ-series CPU Unit	IN area	OUT area

Remote I/O communications

DeviceNet

IN area	OUT area
CS/CJ-series CPU Unit
CS/CJ-series DeviceNet Unit (Slave)

Slaves

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

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