metso automation PDP 400 maxDPU4F Series Installation instructions

Model PDP Series 400 maxDPU4F
Hardware Guide
278705 Rev. A3

Metso Automation •278705 •
Refer to this publication for complete and accurate information that helps you better operate and service Metso
Automation equipment. Your comments and suggestions are welcome.
Metso Automation
1180 Church Road
Lansdale, PA 19446
Attention: Manager, Technical Publications
Copyright 2005 by Metso Automation MAX Controls Inc.
Printed in the United States of America
All rights reserved

Metso Automation •278705 •
Contents
CHAPTER 1...................................................................................................................... 1-1
Introduction.................................................................................................................................................................1-1
Distributed Processing Unit Functionality.................................................................................................................1-1
Model Numbers.................................................................................................................................................1-1
Distributed Processing Unit Hardware..............................................................................................................1-2
Control Processor ..............................................................................................................................................1-2
Performance.......................................................................................................................................................1-2
I/O Bus Interface ...............................................................................................................................................1-2
Fully Self Describing Object Oriented Database...............................................................................................1-2
Fully Software Backplane Compliant................................................................................................................1-3
Sequence of Events............................................................................................................................................1-3
Distributed Processing Unit Specifications .......................................................................................................1-3
Powering the DPU.............................................................................................................................................1-3
Mounting the DPU ................................................................................................................................................1-3
Positioning the DPU in a Standard maxPAC Chassis .......................................................................................1-3
Positioning the DPU When Upgrading .............................................................................................................1-4
Mounting Procedures.........................................................................................................................................1-4
DPU Front Panel Controls and Features................................................................................................................1-4
Mode Switch......................................................................................................................................................1-5
maxNET Interface Ports....................................................................................................................................1-5
Network Status LEDs........................................................................................................................................1-5
Backup Port.......................................................................................................................................................1-5
Backup LED......................................................................................................................................................1-5
Serial Port (Optional).........................................................................................................................................1-5
Reset Button ......................................................................................................................................................1-5
IOM Status LED................................................................................................................................................1-5
I/O Status LED ..................................................................................................................................................1-6
CP Status LED...................................................................................................................................................1-6
State LED ..........................................................................................................................................................1-6
Takeover Button................................................................................................................................................1-6
IRIG-B Port (Optional)......................................................................................................................................1-6
CHAPTER 2...................................................................................................................... 2-1
DPU Front Panel Input/Output Connections ...........................................................................................................2-1
Overview ...................................................................................................................................................................2-1
Ethernet Network Connections..............................................................................................................................2-1
Configuring the Ethernet Switch.......................................................................................................................2-1
Backup Link ..........................................................................................................................................................2-2
Serial Port..............................................................................................................................................................2-2
IRIG-B Interface Port (Optional) ..........................................................................................................................2-2

Metso Automation •278705•
iv
CHAPTER 3 ......................................................................................................................3-1
DPU Switch Setting and Button Controls ................................................................................................................ 3-1
Overview .................................................................................................................................................................. 3-1
Setting the Mode Switch................................................................................................................................... 3-1
Using the Reset Button..................................................................................................................................... 3-2
Using the Takeover Button............................................................................................................................... 3-2
CHAPTER 4 ......................................................................................................................4-1
Interpreting Status LEDs........................................................................................................................................... 4-1
Overview .................................................................................................................................................................. 4-1
Interpreting LED Status While DPU Is Booting Windows CE............................................................................ 4-1
Interpreting LED Status during Normal DPU Operation ..................................................................................... 4-3
Interpreting Virtual I/O LED Status during Normal DPU Operation................................................................... 4-4
LED Indications During Soft Reset...................................................................................................................... 4-4
CHAPTER 5 ......................................................................................................................5-1
Installing Windows CE and maxDNA Software onto the DPU CompactFlash Memory .................................... 5-1
Overview .................................................................................................................................................................. 5-1
Writing the CompactFlash Using the DPU4FSetup Utility.................................................................................. 5-1
CHAPTER 6 ......................................................................................................................6-1
Redundant DPU Operation ....................................................................................................................................... 6-1
Overview .................................................................................................................................................................. 6-1
Automatic Failover / Manual Takeover............................................................................................................ 6-1
Automatic Failover........................................................................................................................................... 6-1
Manual Takeover.............................................................................................................................................. 6-1
Backup State Definition........................................................................................................................................ 6-2
CHAPTER 7 .....................................................................................................................7-1
Starting the DPU......................................................................................................................................................... 7-1
Demanding a Blank Startup.................................................................................................................................. 7-1
Starting a Standalone DPU................................................................................................................................... 7-2
Starting a Backup Pair of DPUs ........................................................................................................................... 7-3
Replacing a DPU in a Backup Pair....................................................................................................................... 7-4
Restarting a DPU after Failover............................................................................................................................ 7-5
Alarm Annunciation ............................................................................................................................................. 7-6
CHAPTER 8 .....................................................................................................................8-1
IRIG-B Interface......................................................................................................................................................... 8-1
Overview .................................................................................................................................................................. 8-1
maxDPU4F IRIG-B Specifications................................................................................................................... 8-2
IRIG-B Cabling ................................................................................................................................................ 8-2
DPU Configuration for IRIG............................................................................................................................ 8-2

Metso Automation •278705 •
Chapter 1
Introduction
Distributed Processing Unit Functionality
The Model PDP Distributed Processing Unit (DPU), which runs under the
Windows CE.net real-time multitasking operating system, is the hardware
processing engine of the maxDNA distributed control system. The DPU
performs primary data acquisition, control, and data processing functions.
The DPU, also known as maxDPU4F, is a self-contained microprocessor-
based, rack-mounted unit, which occupies a single slot in a Remote
Processing Unit cabinet using an 8-wide maxPAC backplane. It is designed
to operate with user-defined combinations of maxDNA Model IOP
Input/Output Modules, and to communicate with other devices, such as
Programmable Logic Controllers and Remote Terminal Units.
As a station on maxNET, the DPU scans and processes information for use
by other devices in the maxDNA system. Each DPU performs:
• Comprehensive alarming and calculations.
• Logging of Sequence of Events (SOE) data at 1 millisecond resolution.
• Acquisition of trend information.
• Continuous scanning of Model IOP I/O modules.
• Execution of predefined algorithms, called Function Blocks, for process
control and data acquisition.
Model Numbers
Model PDP401 – DPU4F #181550
Model PDP403 – DPU4F #181550, Backup Cable #050292
Model PDP406 – DPU4F w/IRIG & Comm. #181551
Model PDP408 – DPU4F w/IRIG & Comm #181551, Backup Cable
#050292

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Distributed Processing Unit Hardware
A DPU consists of a printed circuit board containing the Control Processor
and Input/Output Processor (IOP) and is installed in a maxPAC chassis. The
DPU’s front panel contains status LEDs, a MODE Switch, Backup
Connector, Network Connectors, and takeover and reset buttons. An
optional assembly also contains a Serial Port Connector for interface to PLCs
and a BNC Connector for interface to an IRIG-B time source. See "Front
Panel Controls and Features," later in this chapter.
Control Processor
The DPU is comprised of a single printed circuit board that contains a
Pentium class Control Processor and a dedicated micro-controller for
scanning I/O. There are also sockets on the board for 64 Mbytes of
CompactFlash and 128 Mbytes of DRAM.
Performance
A multi-speed processing system is built into the maxDPU4F, which allows
objects to be executed in three different time classes. From as fast as 10 msec
to 1/2 second. Up to 8,500 control objects (Function Blocks)can be executed
in the DPU. Note also that Function Blocks can be combined to create
libraries of Standard and Custom Blocks. A Function Block can be as small
as an Atomic Block, such as an AND or OR gate.
A data point management system (DPMS) keeps track of the object size and
the total execution time for each time class.
I/O Bus Interface
A Motorola 68332 32-bit I/O processor and field programmable gate array
(FPGA) are used to interface to both the Model IOP I/O bus and to the I/O
Bus Expander Module (BEM) for remote I/O applications. Up to 60 Model
IOP I/O modules can reside on each electrical bus. See Publication 278596,
maxPAC Hardware Reference Guide, and for earlier Model 564 I/O, see
278563, Model IOP I/O System Installation and Preparation. The maximum
length of the Model 564 I/O bus is 30 ft. The length of the remote I/O link
with fiber optic extenders is up to 2000 m.
Fully Self Describing Object Oriented Database
All information regarding the operation of the DPU is kept in DPU memory,
including: tag names, descriptions, tuning constants, alarm limits, etc. In
addition, all graphical configuration data (sheet number, object location,
wiring) is stored in the DPU.
This means that there is no possibility that the configuration observed is
different than that which is installed in the DPU.

Introduction
Metso Automation •278705 •1-3
Objects are stored in a fully hierarchical database, allowing for easy cut and
paste changes and protection of control strategies.
Fully Software Backplane Compliant
With the software backplane installed, the DPU can access any exposed data
stored anywhere in a connected system as long as the connected system also
uses the SPB Protocol. Peer-to-peer transfers are rapid and transparent. No
independent transfer agent is required.
The Software Backplane uses subscription services where data is only
transmitted when changes are detected.
Sequence of Events
Each DPU includes a built-in Sequence-of-Events (SOE) recorder that can
monitor up to 512 discrete inputs. These inputs are scanned 1,000 times a
second and state changes are time stamped with 1 ms resolution and stored in
the DPU's 10,000-event buffer. Each input has a separately configurable
digital filter for contact debounce.
Distributed Processing Unit Specifications
Operating temperature range 0 to 60 degrees C
Storage temperature range (-)25 to 70 degrees C
Relative humidity range 5 to 90% noncondensing
Power requirements 24 Vdc ±4 Vdc
Current: 0.9 A @ 24 Vdc
Powering the DPU
The DPU operates from the main redundant 24 Vdc power supply system in
the maxDNA system cabinets.
Mounting the DPU The DPU is mounted on the Input/Output (I/O) backplane with maxPAC and
earlier Model 564 Input/Output modules.
Positioning the DPU in a Standard maxPAC Chassis
The DPU must be mounted in the left most position of the Model IOP rack to
allow for the best airflow. The Backup cable and Ethernet communications

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cables should be laced to the left side of the chassis with at least a 1 inch
bend radius to allow for easy removal of the DPU, while limiting the strain
on the RJ45 connectors.
When using a second DPU for backup, it should be mounted vertically
beneath the primary DPU for ease of connection of the two-foot backup
cable. The cable is to be held in place by tying to the cable hold downs on
the side of the IOP rack.
The DPU is designed to allow installation and removal with the +24 V dc
power supply turned on.
Positioning the DPU When Upgrading
The DPU can be mounted on the right side of a Six Wide maxPAC chassis or
any slot of the Four Wide Model 564 chassis. In either case, remove all
mounting hardware and termination panels that supported the earlier model
DPU. Install a Chassis 4 Wide maxPAC adapter (Metso Automation
#047350) in the cleared space using the two mounting holes located in the
back panel metal frame.
If the previous DPU was a DPU4E, the Ethernet cables that were plugged
into the termination panel can be plugged directly into the front panel of the
DPU card. Make sure that the settings of the Ethernet switch match the setup
file. See Chapter 5 for the configuration setup.
If the previous DPU was a DPU3, DPU4A, or DPU4B; new Ethernet
switches and cables will need to be installed. Consult the factory for details
about this type of upgrade.
In all upgrade situations, the backup cable must be replaced with a DPU4F
backup cable (Metso Automation # 050292).
Mounting Procedures
Before mounting any hardware, refer to the cabling and field wiring sections
of Publication 278596, maxPAC Hardware Reference Guide, and Publication
278563, Model IOP Input/Output System Installation and Preparation.
To install the DPU in the rack, refer to Chapter 7 Starting the DPU.
DPU Front Panel Controls and Features
All DPU controls, indicator LEDs, and push button switches are accessible
from the DPU’s front panel. Use this front panel to monitor or control
different aspects of the DPU. There are no internal switches or jumpers to be
set during installation.

Introduction
Metso Automation •278705 •1-5
Mode Switch
The Mode Switch is a 16 position rotary switch. It is read after a reset or
power up cycle of the DPU to determine its operational mode. The switch is
also read during online operation to allow setting of the mode to “Running”,
“Locked”, or “Offline”. See Chapter 3 for details.
maxNET Interface Ports
Dual Ethernet 10/100Base-T ports are provided to interface with the
maxNET communication network. The DPU communications is configured
to be 10Mbit Full Duplex, 100Mbit Full Duplex, or Auto-Negotiate. This
configuration setting is accomplished by inserting the DPU’s CompactFlash
into a reader/writer connected to the workstation and running the
DPU4FSetup utility. See Chapter 5 for details.
Network Status LEDs
These LEDs report the status of maxNET Network A and B links.
Backup Port
A 100 MB Ethernet interface is provided to pass database information to a
hot standby DPU. A custom Category 5 Ethernet cable (Part #050292) is
used to connect both DPUs via this port. A status signals are also passed
between DPUs through this port to indicate which DPU is in control.
Backup LED
This LED shows the status of redundancy for DPUs configured as a backup
pair.
Serial Port (Optional)
The optional Serial port is an eight pin RJ45 connector which supports
RS232 signal levels. This port will be used by the DPU to interface with
external PLC type equipment.
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.
Refer to Chapter 3 for more detailed information on the use of this button.
IOM Status LED
The IOM LED shows the operational state of the IOM Processor.

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I/O Status LED
This LED shows the status of I/O bus transactions.
CP Status LED
The CP Status LED reports the health of the Control Processor.
State LED
The State LED reports the current control state of this DPU.
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.
Refer to Chapter 3 for more detailed information on the use of this button.
IRIG-B Port (Optional)
The IRIG port is a BNC connector that supports an interface to a GPS
receiver. This option allows time synchronization to global time.

Metso Automation •278705 •
Chapter 2
DPU Front Panel Input/Output
Connections
Overview All input/output connections are contained on the front DPU chassis panel.
The chassis contains:
• Two 10/100 Ethernet ports
• One Backup Link Port
• One Serial Port (Optional)
• One IRIG-B Interface Port (Optional)
This chapter describes each link in some detail.
Ethernet Network Connections
The DPU chassis contains two 10/100 Ethernet ports using RJ-45 connectors
to interface with the maxNET communication network. Network A and
Network B operate as independent networks. Because the Ethernet channels
are independent, a fault on one network or processor will not affect the
operation of the other, or cause a DPU failover. Ethernet messages are
sent/received based upon the DPU’s Ethernet address with minimal control
processor intervention.
Configuring the Ethernet Switch
Each DPU connects to the maxNET through two Ethernet switches – one for
Network A and one for Network B. The Ethernet switch ports that connect to
DPUs should be configured for 10Mbps or 100Mbpsfull-duplex operation.
Auto-Negotiate is also supported but not the preferred setting. Switch ports
that connect to other switches should be configured for 100Mbps or
1,000Mbps full-duplex operation. Refer to the user manuals that came with
your Ethernet switch to learn how to change the port settings.
Note: When using the Cisco Catalyst 2950 Ethernet Switches, the switch and
DPU should be set to Auto-Negotiate.

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2-2
Backup Link A 100 Mbps Ethernet link is used to pass database information between an
active DPU and an inactive standby DPU. A custom Category 5e cable
(Metso #050292) connects the DPU backup pair together via the backup
link’s RJ-45 connector. Secondary DPUs will typically be installed in the
lower chassis just below the primary DPUs.
Serial Port The DPU front panel contains a serial port utilizing an 8-pin RJ45 style
connector.
Table 2-1 provides the pin-outs for the 8-pin port. The signal levels are
standard RS232.
The serial port supports redundancy when a backup pair of DPUs is used.
The serial port is only operational if the DPU is “Active”. The RS232
drivers on the “Inactive” DPU are turned off. The use of this feature requires
a redundancy cable to connect between the two DPUs and the RS232 device.
(Metso Automation # 050355). This cable has an RJ45 for each DPU and a
common DB9 connector with male pins.
Table 2-1. RJ-45 Serial Port Pin-outs
DPU4F Pin No.
(RJ45) Signal Name Redundancy Cable #050355 Pin No. (DB9 – male pins)
1 NC
2 NC
3 NC
4 Circuit Ground 5
5 RxD 2
6 TxD 3
7 CTS 8
8 RTS 7
IRIG-B Interface Port (Optional)
The DPU front panel optionally contains an IRIG-B ports for connecting to
an external time source. The connector is a BNC and is transformer coupled
on the DPU. See Chapter 8 for more details.

Metso Automation •278705 •
Chapter 3
DPU Switch Setting and
Button Controls
Overview The DPU front panel contains a hexadecimal rotary switch and pushbuttons
for Reset and Takeover. The mode switch is used to determine the
operational mode of the DPU. Refer to this chapter for discussions of these
DPU front panel switches and buttons.
Setting the Mode Switch
The mode switch, a 16 position rotary switch located near the top of the
DPU4F. The following defines the operation for each of the mode settings
for normal and test functionality. An “X” in the “Normal Use” column
indicates that the mode is one that DPU end users are expected to use. The
other modes are intended for factory personnel use.
Setting Normal
Use Description
0 X On-line operation but Locked which inhibits database
changes.
1 X Off-line operation. In this mode the outputs are “Frozen”
and therefore will not change. The State LED will be red.
The mode switch can be changed from “1” and back to “F”
without resetting the DPU.
2 (reserved)
3 (reserved)
4 (reserved)
5 (reserved)
6 (reserved)
7 (reserved)
8 Advanced Operational Mode – Operates as in normal mode
with additional diagnostic features. The local keyboard,
monitor, and mouse will be operational as well as serial
diagnostic messages. Used for factory debug. Performance
of the DPU will be degraded in this mode.
9 Execute diagnostics using the local keyboard, monitor, and
mouse. Always reset the DPU when exiting this mode.
A (reserved)
B X If this mode is set during a re-boot of the DPU, the DPU
will clear the Configuration Database from CompactFlash

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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).

DPU Switch Settings and Button Controls
Metso Automation •278705 •3-3
Once takeover occurs, the now inactive DPU will “warm” (synchronize) its
database from the now active DPU. This will force the inactive DPU’s
database to match that of the active DPU. When the inactive DPU becomes
“hot”, it will automatically go active if the active DPU’s quality is
significantly below the quality of the inactive DPU.
If you wish to guarantee that an inactive DPU goes active and stays active,
you must “kill” the currently active DPU. This can be done by either
unplugging the DPU from its chassis or by writing to the “ForceFatal”
attribute of the active DPU.
Pressing the Takeover button on an active DPU has no effect.

Metso Automation •278705 •
Chapter 4
Interpreting Status LEDs
Overview Refer to this chapter when you need to interpret the meanings of the 9 status
LEDs on the DPU front panel. At various times the LEDs flash green,
yellow, red or display no color to indicate the associated hardware’s
functional status. Discussions in the following sections explain what the
color changes may indicate under different DPU states.
The status LEDs are divided into the following sections:
Network Status LEDs
maxNET Network A health – 1 Green and 1 Yellow
maxNET Network B health – 1 Green and 1 Yellow
Backup link health – 1 Multicolor Green/Red/Yellow
Operational Status LEDs
IOM Health – 1 Multicolor Green/Red/Yellow
I/O Status – 1 Multicolor Green/Red/Yellow
CP Health – 1 Multicolor Green/Red/Yellow
State – 1 Multicolor Green/Red/Yellow
All or some of the LEDs display a set of color codes associated with the
following DPU states:
• DPU during a Windows CE boot
• DPU during normal operation
• DPU responding to soft reset
Interpreting LED Status While DPU Is Booting Windows CE
The following is a description of the LED sequencing starting from a reset to
the completion of initialization.
After Reset

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After a reset, the IOM and CP LEDs are Yellow, while all others are off.
Once Windows CE is loaded into memory the CP initializes the FPGAs. This
results in the IOM LED going red and the I/O LED going off. The CP then
releases the IOM processor which causes it to execute startup diagnostics.
The I/O LED changes colors rapidly while executing the diagnostics. When
complete the IOM LED turns green and the I/O LED goes off.
If the BIOS on the CompactFlash is different than the one stored in onboard
flash it will be written to the onboard flash. During this time the CP and
State LEDs will alternately blink red. DO NOT stop the DPU during this
period or the flash could become corrupt and the DPU will need to be
returned to the factory for repair. Once the BIOS is written, the DPU will go
through another reset cycle. Most updates will not require a BIOS change.
Next the CP goes yellow while rebuilding the database. This can be brief or
up to 30 seconds depending on the size of the stored database. The CP LED
then turns to blinking green/yellow. This is a “heartbeat” signifying that the
CP is operational. The State LED goes red temporarily and then to green.
The network “A” and “B” LEDs start off blinking yellow until the DPU
hears communication from another station in its domain. The LED goes
solid yellow and then to green. If the LED remains solid yellow, it signifies
that this DPU is receiving a message from another station and the message
shows that the other station does not hear this DPU.

Starting the DPU
Metso Automation •278705 •4-3
Interpreting LED Status during Normal DPU Operation
maxNET NETWORK LEDs
LED Green Yellow Blinking Yellow Off
Network A
Or
Network B
Network A
Operational Some Network Error ** Network failure - DPU does not hear
from any station
DPU not Operational
or LED Bad
** Each device (DPUs and Workstations) send messages that contain a list of all stations from which it is currently
receiving messages. If the DPU receives messages from a station that does not report receiving messages from it,
the DPU illuminates the Yellow LED. The problem may or may not be this DPU.
General Status LEDs
LED Green Yellow Red Off
Backup
Network Backup Network Operational Some Backup Network Failures Communications Not Established to
Backup DPU
DPU not Operational
or LED Bad
IOM
Operational IOM N/A IOM Failed / Timed- out
Reset Required
IOM not initialized
I/O
All configured I/O cards are working
correctly
Some configured I/O
cards are working
correctly, some are
not
No configured I/O
cards are working
correctly
No I/O cards
configured in the
database or IOM
failure
CP
Blink Yellow/Green – Healthy Heartbeat
Solid Green- CP
failure
Blink Yellow/Green –
Healthy Heartbeat
Solid Yellow
(<20sec)– Loading, or
saving the Database
Solid Yellow (>20sec)
– CP failure
Card Failure Card Failure
State
See Below See Below See Below DPU not Operational or LED Bad
DPU STATE LED
DPU States Active DPU State/LED Inactive DPU State/LED
Standalone DPUs Green Yellow
Backup Warming Blinking Green/Red Blinking Yellow/Red
Hot Backup Blinking Green/Yellow Blinking Yellow/Off
Backup Enabled No Backup
Available Blinking Green/Off N/A
Offline Red Red
Booting Off then Blinking Red Off then Blinking Red

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Interpreting Virtual I/O LED Status during Normal DPU Operation
The previous DPU (DPU4E) contained four I/O LEDs. The DPU4F contains
one I/O LED that is the combination of the four. The maxVUE DPU4F
Detail and DPU4FPair Detail displays show the four individual “virtual”
LEDs. These LEDs display the status of each of the four I/O queues. In
general, the I/O cards of a given type are assigned to the labeled LEDs;
however, due to I/O bus transaction processing requirements, some of the I/O
modules of different types or different applications are assigned to different
queues. The following table shows the queue assignments for each type or
application of an I/O module.
I/O Card DI LED AO/DO LED AI LED Unlabeled LED (Item Queue)
SOE DI X
Slow DI X
AI 564 X
TC 564 X
RTD 564 X
AO 564 X
Counter Timer 564 X
Quad PAT 564 or maxPAC X X
Output Driver 564 X
DO 564 or maxPAC X
AI maxPAC X X
TC maxPAC X X
RTD maxPAC X X
AO maxPAC X X
Counter Timer maxPAC X X
Over Speed Module maxPAC X X
Turbine Valve Module maxPAC X X
LED Indications During Soft Reset
The CP and State LEDs turn red during the save of the database to the
CompactFlash. The DPU will then reset causing the I/O and CP LEDs to
turn yellow and all others off. See the startup sequence for details about the
restart.