This section explains the restrictions on the connection methods and other information applicable when the QCPU redundant system is monitored by the GOT.
Monitor target
module | supplyPower | Q25PRHCPU |
Control
system
(System A)
Tracking cable
| Station No. 0 |
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| Station No. 1 |
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(Multiplexed remote master station) | Q25PRHCPU | (Multiplexed remote sub master station) | |||||||||
QJ71BR11 | QJ61BT11N | Empty | supplyPower module | QJ71BR11 | QJ61BT11N | Empty | |||||
Standby
system
(System B)
remote I/O network
Station No. 2 (remote I/O station)
supply Power module | 25- | Empty | Empty |
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| The GOT monitors |
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| CPU direct |
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| GOT |
| the control system |
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| PLC CPU. | |
| connection |
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When an error occurs in System A, System B switches from standby system to control system.
module | supplyPower | Q25PRHCPU |
Standby
system
(System A)
Tracking cable
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| Monitor target |
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| Station No. 0 |
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| Station No. 1 |
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| (Multiplexed remote master station) | Q25PRHCPU | (Multiplexed remote sub master station) | |||||||
- | - | QJ61BT11N | Empty | supplyPower module | QJ71BR11 | QJ61BT11N | Empty | |||
Control
system
(System B)
MELSECNET/H remote I/O network
Station No. 2 (remote I/O station)
supply Power module | QJ71C24N | Empty | Empty |
The GOT monitors the PLC CPU
GOT of the new control system after
CPU direct 
system switching. connection 
In a redundant system, the monitoring can be performed with the monitoring target specified as the control system or the standby system on the GOT. By specifying the monitoring target PLC CPU as the control system of the redundant system, the monitoring target is automatically changed to the PLC CPU in the control system when system switching occurs.
To enable this automatic changing of the monitoring target at the GOT, settings are required in the GT Designer3. 
4.9 Q Redundant Setting
4 - 2 | 4. HOW TO MONITOR REDUNTANT SYSTEM |