Model PDP Series 200 maxDPU4F Hardware Guide
Metso Automation
•
278705
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3-2
and go on line as in mode “F”. Once the DPU is on-line the
Mode switch should be moved back to the “F” position so
that an unexpected restart of the DPU will not erase the
new database.
C
X
Network Flash mode where DPU uses a fixed IP and MAC
address. Used when the DPU needs to be configured for
first time use or change of address. The software can also
be upgraded on the DPU’s CompactFlash.
D
Debug mode. This is a factory test mode. The DPU
applications will not start automatically.
E
X
Network Flash mode used to upgrade software on the
DPU’s CompactFlash. Some configuration parameters can
also be modified if necessary.
F
X
Normal operating mode. Will use the database stored in
flash if available.
Using the Reset Button
Pressing this button will cause the DPU to stop controlling and go through a
reset cycle. This should not be done casually as it can cause a severe
disruption to your process.
If the Reset button is pressed for less than 2 seconds, the DPU will save the
current configuration database and then reset itself (Soft Reset). If the Reset
button is depressed for longer than 3 seconds, the DPU will immediately
reset. (Hard Reset) NOTE: during normal operation the DPU continually
saves the configuration database to CompactFlash. For typical databases,
this will be done every 5 minutes. If a hard reset is performed, the DPU will
still contain a recent database and will attempt control once restored. This is
different from previous versions of the DPU where the configuration
database was not routinely saved. In previous DPUs, a Hard reset would
prevent the database save and the DPU would come up blank. To prevent
control or the use of a previous database, set the Mode Switch to “B” and the
DPU will clear the database during the boot cycle.
Using the Takeover Button
Pressing the Takeover button can force a previously inactive DPU to go
active. This should not be done casually as a manually forced takeover
occurs regardless of the inactive DPU’s ability to control. This can have
severe consequences to your process.
If the Takeover button is pressed on an inactive standalone DPU (i.e., backup
is not enabled), the inactive DPU will go active regardless of its health,
database, or key switch position. In this mode
If the Takeover button is pressed on the inactive DPU of a DPU pair (backup
enabled), the inactive DPU will go active regardless of its health or mode
switch position as long as it is hot. A “hot” DPU is one that has a database
that matches that of the other member of its pair (including the case where
neither DPU has a database).
Summary of Contents for PDP 400 maxDPU4F Series
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