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Model PDP DPU Installation, Preparation and Adjustment
Reset Button
Backup Link
CPU Load
Takeover Button
Backup DIP Switch Settings
2-6
The Reset pushbutton does not produce a true hard reset; when you press
this button, the DPU receives a false indication of impending +24 Volt
power loss, causing the DPU to save the database into flash memory and
wait for a power down that never occurs. However, a deadman timer
associated with the Control Processor Card will cause a true hard reset after
this routine finishes, after which a cool initialization will occur.
When used with a backup DPU, a cable (Part 081387) runs between this
connector on both DPUs.
When used without a backup DPU, a terminator (Part 081388) must be
installed in this connector.
For Metso Automation MAX Controls Factory Service use only.
When two DPUs are used in a backup configuration, press the Takeover
button on one of the DPUs to force that DPU to take control, making the
other inactive.
Use the four-position backup DIP switch to select various DPU backup
configurations. If backup is not configured, the top most switch should be set
to the right and the others to the left. Refer to Chapter 5.
The first position (top) on the DIP switch lets you designate the DPU as
primary or secondary. Primary is to the right.
The second position designates a separate or shared parallel input/output
bus. Common (Shared) is to the left. Separate is to the right.
Note: if you are configuring a mixed I/O system using some shared and some
separate I/O with a Y-Adapter, select Separate.
Metso Automation MAX Controls • • • • 277573 • • • •
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