Omron CS1W-CLK21-V1, CVM1-CLK21 Data Links, Message Service, Automatic Setting, Manual Setting

Models: CS1W-RPT01 CJ1W-CLK21-V1 CVM1-CLK21 CQM1H-CLK21 CS1W-CLK21-V1 C200HW-CLK21

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Overview

Section 1-1

Data Links

Data links allow the constant sharing of data in predetermined data areas between nodes, between PLCs, or between a PLC and an IBM PC/AT or com- patible computer on the network. Data links do not require the use of commu- nications programs on the PLC (CPU Unit) or IBM PC/AT or compatible computer. Data written in the send area of the local node will be automatically sent to the receive area of other nodes.

The I/O area (CIO area), link area (LR area), DM Area area (DM area), and extended DM Area area (EM area) can be freely set in the send or receive area. (The area used for sending or receiving data using the data link function is called “data link area.”)

The data link area can be set automatically or manually.

Controller Link Unit

 

PLC

PLC

PLC

 

 

 

Constant data exchange (sharing)

Automatic Setting

Used for simple data link processing. Data link can be performed by simply

 

setting parameters in the DM area of the PLC.

 

Send data size per node is the same for all nodes. All nodes participating in

 

the data link share the same data.

 

 

Manual Setting

Used for flexible data link processing depending on each system.

 

Using the Controller Link Support Software, individual data link tables can be

 

set for each node and the data link area can be freely allocated for each node.

 

Send data size per node can be freely set. It is also possible to set nodes for

 

only send or receive data. With the Controller Link Unit, the data link can be

 

set to receive only a part of the data link area of other nodes.

Message Service

 

 

 

 

 

 

 

 

 

This function controls data transmission with particular nodes, reading or writ-

 

ing of status data, changing of operation modes, etc., by executing communi-

 

cations instructions on a program. The communications instructions include

 

SEND/RECV instructions for data transmission and CMND instructions for

 

issuing various commands.

 

 

 

 

 

Controller

Link Unit

 

 

 

 

PLC

 

PLC

 

 

PLC

 

Data transmission (under certain conditions) as required

Communications instruction

User program

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Omron CS1W-CLK21-V1, CVM1-CLK21, CS1W-RPT01, CJ1W-CLK21-V1 Data Links, Message Service, Automatic Setting, Manual Setting