Panasonic WJ-MPU955A Manual Do Utilizador

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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.

● 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

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 Changing from Automatic

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

UAL. 

2. Reboot both CPUs.

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

● When Adding a Redundant CPU to a

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.

■

On: Active
Blink slowly (around 0.5 seconds on, around 2.5 sec-

onds off): Standby

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

• Setting is incorrect.
• Both CPUs are Active.
• No CPUs are Active.

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

CPU.