● Operation and Recovery after Failure of One of Two Duplex Power
Supply Modules
To simulate failure of one of two duplex power supply modules, unmount one power
supply module from the base module or interrupt the power supply to one power
supply module.
When one power supply module fails, verify that a system alarm is generated but
control itself is not affected and continues normally.
Verify also that operation is not affected when the failed power supply module is
restored.
● Operation and Recovery after Failure of One of Two Duplex Control
Networks (FCN-500 only)
To simulate failure of one of two duplex control networks, disconnect the cable from
one of two duplex control network ports, or power off the Hub on one of two duplex
transmission paths.
As described in Section 2.1.4, “Measures for Duplexing,” when communication
unsuccessful communication diagnostic frames are sent two times, communication
on that path is diagnosed as error.
Therefore, wait several seconds before checking the operation. After that, restore
the control network and again check the operation.
● Operation and Recovery after Failure of One of Two Duplex E2 Bus
Interface Modules (FCN-500 only)
To simulate failure of one of two duplex SB bus repeat modules, unmount one of the
E2 bus interface modules from the base module or disconnect one of the two E2
bus cables.
When one SB bus repeat module fails, verify that a system alarm is generated but
control itself is not affected and continues normally.
Verify also that operation is not affected when the failed E2 bus interface modules is
restored.
● Operation and Recovery after Failure of One of Two Duplex SB Bus
Repeat Modules (FCN-500 only)
To simulate failure of one of two duplex SB bus repeat modules, unmount one of the
SB bus repeat modules from the base module or disconnect one of the two SB bus
cables.
When one SB bus repeat module fails, verify that a system alarm is generated but
control itself is not affected and continues normally.
Verify also that operation is not affected when the failed SB bus repeat module is
restored.
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