When Using Two Gots - Mitsubishi Electric GT1685 Connection Manual

4.2.2

When using two GOTs

Connect a GOT to each PLC CPU to respond to the system switching.
Monitor
target
Control system
(System A)
Network No. 1, Station No. 2
(remote I/O station)
(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.
(2) GT Designer3 setting
Set GT Designer3 as follows.
Setting item
Controller Type
Device setting (Network setting)
Q Redundant Setting
*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 - 12
4. HOW TO MONITOR REDUNTANT SYSTEM
4.2 Direct CPU Connection
CPU direct connection
GOT1
Network No. 1, Station No. 0
(Multiplexed remote master station)
MELSECNET/H remote I/O network
6. DIRECT CONNECTION TO CPU
GT16, GT15, GT12: MELSEC-QnA/Q/QS, MELDAS C6*
GT14, GT11: MELSEC-QnA/Q, MELDAS C6*
Host
4.9 Q Redundant Setting
4.9 Q Redundant Setting
CPU direct connection
GOT2
Network No. 1, Station No. 1
(Multiplexed remote sub master station)
Settings
*1
Standby system
(System B)
Model
*2