Panasonic WJ-MPU955A manual Active Indicator Meanings, For Automatic Switchover Operation

3.Turn both CPUs on.

4.By using the admin console, click the "Get CPU Status" button. When the admin console asks to set default sta- tus, click "Yes"

When switching the CPU to Active/Standby

By using the admin console, click the "Switch Active CPU" button on the "CPU" screen. The Active CPU reboots auto- matically, and moves to Standby. The other CPU moves to Active.

●When Changing from Automatic Switchover Operation to Manual Switchover Operation

1.Set the REDUNDANT AUTO/MANUAL selector to MAN- UAL.

2.Reboot both CPUs.

Note: No CPUs will be Active while CPUs are rebooting.

●For Automatic Switchover Operation

1.Connect the 9-pin D-sub cross cable (locally procured) between the SERIAL 2 ports of both CPUs, and con- nect the Ethernet cable between the SYSTEM CON- TROLLER ports of the CPUs.

2.Set the REDUNDANT YES/NO selector to YES, and set the REDUNDANT AUTO/MANUAL switch to AUTO.

Notes:

•If the REDUNDANT YES/NO and AUTO/MANUAL selector settings of both CPUs are mixed, the redundant function does not work properly. In this case, the ACTIVE indicator of either CPU blinks fast (around 0.5 seconds on, around 0.5 seconds off) during operation.

•When activating automatic switchover operation, user should not register a controller to the SERIAL 2 port in the CONTROLLERS section of admin con- sole.

3.Turn on CPU A until the indicator blinks (around 2.5 seconds on, around 0.5 seconds off.) Then, turn on CPU B.

When switching the CPU to Active/Standby

When a fatal application software error happens in the Active CPU, the Standby CPU will switchover automatically. When a fatal OS system error happens in the Active CPU, the Standby CPU may automatically switchover but the Active CPU may need to reset manually.

Notes:

•If the Standby CPU also has fatal error, the switchover is not performed.

•When the 9-pin D-sub cross cable is disconnected, the Standby CPU will become Active, and the Active CPU will reboot.

●When Changing from Manual Switchover Operation to Automatic Switchover Operation

1.Connect the 9-pin D-sub cross cable (locally procured) between the SERIAL 2 ports of both CPUs.

2.Set the REDUNDANT AUTO/MANUAL selector to AUTO.

3.Reboot the Standby CPU. When the ACTIVE indicator blinks fast (around 0.5 seconds on, around 0.5 sec- onds off), reboot the other CPU.

●When Adding a Redundant CPU to a Standard System

1.Connect the 9-pin D-sub cross cable (locally procured) between the SERIAL 2 ports of both CPUs, and con- nect the Ethernet cable between the Ethernet ports of the CPUs.

2.Set the selectors to desired state.

3.Turn on the added CPU. When the ACTIVE indicator starts blinking (around 2.5 seconds on, around 0.5 sec- onds off), click the Redundant checkbox and set the Redundant information in the admin console. By using the admin console, click the "Get CPU Status" button. When the admin console asks to set default status, click "Yes". Then, reboot the other CPU.

Note: During the REDUNDANT/MANUAL operation, no CPUs will be Active while the CPUs are rebooting.

●Updating System Software

To update the WJ-MPU955A system software without stop- ping the system, update the software to the Standby CPU first.

1.Update the software of the Standby CPU.

2.Reboot the Standby CPU.

3.Update software on the Active CPU.

4.By using the admin console, press the "Switch Active CPU" button.

■Active Indicator Meanings

On: Active

Blink slowly (around 0.5 seconds on, around 2.5 sec- onds off): Standby

Blink (around 2.5 seconds on, around 0.5 seconds off):

The CPU is Active, but the other CPU is down when those CPUs are set for REDUNDANT YES and AUTO.

Blink fast (around 0.5 seconds on, around 0.5 seconds off)

•Setting is incorrect.

•Both CPUs are Active.

•No CPUs are Active.

Off: At least one important program does not work in the CPU.

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