4.1.2Computer link connection (Connection to serial communication module mounted on remote I/O station)

This section explains the computer link connection that connects the GOT to the serial communication module mounted on the remote I/O station of the MELSECNET/H network system.

The following shows an example of connecting the GOT to the serial communication module mounted on the remote I/O station of the MELSECNET/H network system.

 

 

 

 

Network No. 1, Station No. 0

 

 

 

 

Network No. 1, Station No. 1

Monitor target

Q25PRHCPU

25-QJ71LP21

(Multiplexed remote master station)

Q25PRHCPU

 

25-QJ71LP21

(Multiplexed remote sub master station)

 

Power modulesupply

QJ71BR11

100-QJ71E71

QJ61BT11N

Empty

 

Power modulesupply

 

QJ71BR11

100-QJ71E71

QJ61BT11N

Empty

Standby system

Control system

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

(System B)

(System A)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

MELSECNET/H remote I/O network

 

 

 

 

 

 

 

 

 

 

 

 

 

Power modulesupply

25-QJ72LP25

QJ71C24N

Empty

 

Empty

 

 

 

 

 

Network No. 1, Station No. 2 (Remote I/O station)

Computer link connection

GOT

(1) Connection method

Connect the GOT to the serial communication module (QJ71C24, QJ71C24-R2, QJ71C24N, QJ71C24N-R2, QJ71C24N-R4) or modem interface module (QJ71CM0) mounted on the remote I/ O station of the MELSECNET/H network system.

For details, refer to the following.

7. COMPUTER LINK CONNECTION

(2) GT Designer3 setting

Set GT Designer3 as follows.

Setting item

Settings

Model

 

 

MELSEC-QnA/Q/QS, MELDAS C6*

 

Controller Type

 

 

 

 

 

MELSEC-QnA/Q, MELDAS C6*

 

Device setting

Host

Host

 

 

 

 

(Network setting)

Remote master

Other (NW No. 1 (network No. of remote I/O network),

 

 

 

 

station

Station No. 0 (master station))

 

Q Redundant Setting

 

Do not set the item.

 

In this case, the GOT monitoring is performed by transient transmission of the MELSECNET/H network system. Therefore, a longer time-lag occurs for displaying objects compared with directly monitoring the PLC CPU.

For displaying objects with a shorter time-lag, execute the cyclic transmission so that the GOT can monitor link devices B and W of the host station set in the MELSECNET/H network.

For details, refer to the following manual.

Q Corresponding MELSECNET/H Network System Reference Manual (Remote I/Q network)

(3)Monitoring target change when system switching occurs in a redundant system

When the system switching occurs, the multiplexed remote sub master station switched to the control system takes over the master operation of MELSECNET/H.

Since the GOT monitors the master station, the monitoring target is automatically changed to the PLC CPU that is operating as the master.

1

PREPARATORYFORPROCEDURESMONITORING 2

RANGESETBE

DEVICE CANTHAT 3

RANGEACCESS MONITORINGFOR 4

MONITORTOREDUNTANTSYSTEM HOW 5

CONNECTIONBUS 6

DIRECTTOCONNECTIONCPU 7

LINKCOMPUTER CONNECTION 8

ETHERNETCONNECTION

4. HOW TO MONITOR REDUNTANT SYSTEM

4 - 9

4.1 Connection to Remote I/O Station in MELSECNET/H Network System