Monitoring overview

The following two methods are available for monitoring by the GOT with CC-Link communication unit.

Monitoring method

Monitoring by transient transmission*2

Monitoring by cyclic transmission*2

 

Devices of the PLC CPU on the CC-Link system master and

All remote inputs/outputs and remote registers assigned to

Contents

the Master station by CC-Link parameter setting are

local station are specified and monitored.

 

specified and monitored.

 

 

 

 

 

 

The CC-Link parameter setting sequence program is

 

Advantage

required. However, the GOT communication sequence

The data communication processing speed is high.

 

program is not needed.*1

 

 

 

• Writing from the GOT (read command from the master

 

The data communication processing speed is lower than

station) can be performed only to remote outputs and

Disadvantage

remote registers assigned to the GOT of the master

that of cyclic transmission.

 

station and to the GOT internal registers.

 

 

 

 

• GOT communication sequence program is required.*1

*1 This program is not required if the CC-Link parameter setting sequence program and GOT communication sequence program satisfy the following conditions.

•Use a QCPU (Q mode) or QnACPU whose number given in the DATE field of the rating plate is "9707B" or later as the PLC CPU of the master station.

•Use GX Developer or SW2-GPPW and make CC-Link parameter setting and batch refresh device setting in the CC-Link setting on the package.

For details of the connection method, refer to the following manual .

User's manual of the CC-Link master unit to be connected

*2 For whether the data can be sent to/received from the CC-Link Ver. 2 compatible station by transient transmission and cyclic transmission, refer to the following.

■ When using CC-Link connection (intelligent device station)

POINT

In transient transmission, connection of several (five or more as a guideline) intelligent device stations (GOTs and intelligent device units) reduces the data communication speed.

To raise the data communication speed, increase the CC-Link system, for example, and do not connect five or more intelligent device stations to a single CC-Link system.

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3. ACCESS RANGE FOR MONITORING

 

3.3 CC-Link System Access Range for Monitoring