Mitsubishi Electric GT15, Connection Manual

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4. HOW TO MONITOR REDUNTANT SYSTEM
4.2 Direct CPU Connection
4.2.2 When using two GOTs
Connect a GOT to each PLC CPU to respond to the system switching.
(1) Connection method
Connect GOTs to the RS-232 interface of the control system and standby system CPU modules (Q12PRHCPU,
Q25PRHCPU) of the redundant system.
For details, refer to the following.
6. DIRECT CONNECTION TO CPU
(2) GT Designer3 setting
Set GT Designer3 as follows.
*1 GT14 and GT11 are not compatible with MELSEC-QS.
*2 Only the CPU which is connected to GT11 directly can be monitored on GT11. The setting of GT Designer3 is not necessary.
(3) Monitoring target change when system switching occurs in a redundant system
When the system switching occurs, the GOT cannot change the monitor target automatically in response to the
system switching.
The GOT that is connected to the control system CPU module after system switching continues the monitoring.
Different from the case using one GOT, no cable reconnection is required.
POINT POINT POINT
To automatically change the monitoring target after system switching using one GOT, make the Q redundant
settings.
4.9 Q Redundant Setting
Setting item Settings Model
Controller Type
GT16, GT15, GT12: MELSEC-QnA/Q/QS, MELDAS C6*
GT14, GT11: MELSEC-QnA/Q, MELDAS C6*
*1
Device setting (Network setting) Host
*2
Q Redundant Setting
4.9 Q Redundant Setting
Monitor
target
Network No. 1, Station No. 0
(Multiplexed remote master station) Network No. 1, Station No. 1
(Multiplexed remote sub master station)
Network No. 1, Station No. 2
(remote I/O station)
Power supply module
Power supply module
Power supply module
MELSECNET/H remote I/O network
CPU direct connection
GOT1
Control system
(System A)
Empty
Q25PRHCPU QJ71LP21-25
QJ71BR1
1
QJ71E71-100
QJ61BT1
1N
Standby system
(System B)
QJ72LP25-25
QJ71C24N
Empty
Q25PRHCPU QJ71LP21-25
QJ71BR1
1
QJ71E71-100
QJ61BT1
1N
Empty Empty
CPU direct connection
GOT2