Emerson Bristol ControlWave Express Manual de usuario descargar pdf (Pagina 3)

Product Data Document

420DS-3d

July 16, 2007 - Page 3

Bristol

ControlWave

Designer

Remote Automation Solutions

Website: www.EmersonProcess.com/Remote

Alarm reports may be enabled or disabled to

suppress nuisance alarms

Alarm Priority – Event, Operator guide, Non-

critical or Critical

Alarm descriptor text string

Reports single, momentary and multiple alarm con-

ditions since last report

Alarms may be transmitted to up to four network

connected PCs. Other PCs may obtain the alarm

reports from the four declared PCs. At any time the

operator may request all current unacknowledged

alarms be re-reported. This is particularly useful

for PC HMI software products that do not store the

system alarm history. In this case the alarm history

can be obtained from ControlWave at the operators

discretion.

Historical System

Again, most systems rely on the PC to collect and

store historical data. But what happens when the

data can’t be collected due to a communication

line failure. ControlWave ensures that important

audit and archive data is securely stored, with time

stamp, in the controller. To accomplish this, the De-

signer allows conguration of two special historical

function blocks.

The historical data may be logged to either RAM or

non-volatile Flash memory. The data is maintained

even after a cold start or application downloading.

Archive Function Block

Historical archive les are similar to data arrays,

except that each column is directly associated with

a particular ControlWave variable, and each column

has a descriptive title. The rst column of each row

contains a time stamp, and the remaining columns

in a given row are the variable values (or results of

calculations based on variable values collected at

the time specied by the time stamp. The data oc-

cupying a particular row is referred to as a record; a

record index is kept which points to the row contain-

ing the current record.

•

Data storage interval may be 1 minute, 5 minutes,

15 minutes, hourly, or daily. Each le can be up to

64 Kb

Emerson’s Bristol OpenBSI Utilities provides facili-

ties to collect this Audit and Archived data, on a

scheduled or demand basis, and present them in

useful formats including .CSV and ODBC Access

formats.

The Audit System is responsible for detecting and

logging of selected events and alarms. The Audit

system is very application specic. It is often used in

applications requiring quality tracking and reporting.

Certain alarms, perhaps a high alarm on a pressure

measurement, can be recorded in the Audit. Signi-

cant events may also be recorded. For example, a

maintenance technician might replace a valve or a

pump with different operating characteristics.

Audit Function Block

The Audit function blocks allows separate logs for

alarms and events. For all alarm signals in the con-

troller, the Audit Function Block generates a one-line

message when the alarm signal goes into its alarm

state, or when it returns to normal after having been

in alarm. An event message is generated for signals

that are included in a special signal list. Time stamp

resolution for alarm and event message in the Audit

storage is 1 ms. Reported alarm resolution is 20 ms.

Each log can be up to 64 Kb

Language Support - Why Settle For Only

One

While many IEC 61131-3 programming tools offer

only Ladder Diagram or a limited set of languages,

ControlWave supports all ve languages available

in the IEC 61131-3 standard. The rst three are

graphical programming languages; Ladder Diagram,

Sequential Function Chart, and Function Block

Diagram. The latter two, Structures Text and Instruc-

tion List are text-based languages. Any or all ve

languages may be used to implement a process

control scheme.

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1 2 3 4 5 6 7 8 9 10

ControlWave 1
Designer 1

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