What is DCS ?
DCS is abbreviation for Distributed Control System
As is apparent from the abbreviation, the word ‘Distributed’ supports
Physical Distribution - Nodes or Subsystems can be Distributed I.e
located physically apart
Functional Distribution - Specific Functionality is imparted for a
Node basing on the combination of hardware and software used. For
e.g Application work-processor with Historian, Application work-
processor with control configuration software
Structural Distribution - Different Structural hardware platforms
(Application Workstation processor, Workstation processor, Control
processor etc.) are used to achieve the required functionality.
WHY DCS ?
For Total Plant Automation
For Higher Productivity
For Optimal Process Control
For Regulatory Compliance
For Management Information System
In Tune With Global Requirement
ASEA BROWN BOWERI – ABB
FOXBORO - INVENSYS
What DCS we are using?
Emerson Delta V system
Overview of Delta V system
Controller and IO Controller and IO
Professional PLUS (Engineering)
Every DeltaV system must
have one, and only one,
Professional PLUS Station. It
provides the global
configuration and the
configuration database for the
system. Therefore, it is the
primary engineering and
configuration interface for a
DeltaV System. For small
DeltaV systems, it also serves
as the operator and diagnostics
interface for the system.
Application (PI Historian)
This Application Station
provides integration between
your DeltaV system and the
rest of your day-to-day
operations, using OLE for
Process Control (OPC).
Optionally, you can extend
your DeltaV system with
DeltaV applications and other
tailored for your particular
process. It is also act as a PI
Delta V controller
The CONTROLLER manages all
control activities for the I/O interface
channels. It also manages all
communication functions for the
communications network. Time
tamping, alarming, and trend objects
are also managed within the controller.
The controller executes your control
strategy. Information from an input
channel is received, control strategy
applied, and data sent to an output
channel within 100 ms.
The DeltaV I/O subsystem is
comprised of the following
For workstations that are
required for operating the
process and viewing
continuous history only,
select the Operator Station
added to the Operator
Station Software Suite are
the Event Chronicle,
Diagnostics, and Control
Typical Schematic Diagram For Information
JB TB IO CARD CONTROLLER
IO CARD CONTROLLER
OPERATOR STATION BUTTONS1
Acknowledge Alarm - This button is displayed in
the Alarm Banner. It also appears in the faceplate
and detail displays for the standard modules. If you
select this icon in the Alarm Banner, the system
acknowledges all the unacknowledged alarms in the
main process graphic. Only those alarm parameters
that are part of the graphic are acknowledged.
Silence Horn - This button stops the horn. If new
alarms become active, the horn sounds again.
OPERATOR STATION BUTTON2
Alarm Suppress - This button is displayed in the Alarm
List picture and the Alarm Filter picture. Clicking the
Alarm Suppress button opens the Operator Suppressed
Alarm picture, which lists all of the suppressed alarms.
Diagnostics - This button is displayed in the Alarm banner.
It shows your Communications status. The Diagnostics
button displays two indicators for the Primary
Communications network and four indicators for the
Secondary Communications network. Clicking the
Diagnostics button launches diagnostics, which provides
more detailed information.
OPERATOR STATION BUTTONS3
Disable Horn/Enable Horn - When disabled, new alarms
do not cause the horn to sound. This setting is a parameter
of the current user's session. When a new user logs on, the
horn is enabled.
Node Status - This button is displayed in the Alarm banner.
This button is not displayed if Batch Operator Interface is
running. Clicking the Node Status button launches the Node
Status picture, which provides information on your node
(for example, current status and time of last status change
or download as well as whether or not its alarms have been
LEVEL BAR DYNAMOS
0% level empty bar
0.01% to 100% - Bright green filling
Yellow Flashing bar if not acknowledge
Steady yellow bar if acknowledged
Red Flashing bar if not acknowledge
Steady red bar if acknowledged
ANALOG INPUT FACEPLATE
ANALOG INPUT DETAILS FACEPLATE
PV filter time