Emerson Process Management Express Benutzerhandbuch

420DS-6c / 

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January 29, 2009 - Page 2

Bristol

®

 ControlWave

®

 Express

ControlWave Express can also be combined seam-
lessly with other members in the ControlWave family 

of products. For remote applications requiring more 

I/O flexibility, ControlWave Micro provides a modular 

RTU/PLC expandable up to 14 I/O modules.  

For natural gas well site and measurement station 

automation, ControlWave single and multi-run flow 
computers share a common architecture with the 
ControlWave family of products and all meet API 

21.1 requirements for multiple meter runs.  

For in-plant control applications, ControlWave and 

ControlWave Micro are powerful, flexible PLCs. 
ControlWave offers the greatest local and remote 
I/O expansion to hundreds of I/O points, up to three 
Ethernet ports for network segmentation, plus CPU, 

communication and I/O redundancy capability.

The combined benefits of the ControlWave family 
of products integrates your wide area network with 

your local area network. 

Only ControlWave brings the perfect combination of 

industry standards to minimize learning, engineering 

and implementation costs. 

By adhering to such industry standards as Ethernet, 
TCP/IP, Microsoft Windows®, COM/DCOM, FTP, 
OLE and ActiveX, ControlWave is able to achieve 
the highest degree of openness in control system 

architecture and bring the optimal process efficiency 
and productivity needed to ensure a successful 

system implementation. 

To minimize your engineering and development 
time, we have adopted the international standard 

for PLC programming, IEC 61131-3. ControlWave 
Designer is a fully IEC 61131-3 compliant program-
ming environment for the ControlWave family of 

products. ControlWave Designer includes all five 

IEC 61131-3 process languages for batch, continu-
ous and discrete control:  Function Block Diagram, 
Structured Text, Sequential Function Chart, Ladder 

Logic Diagram and Instruction List.

ControlWave Designer includes an extensive library 
of more than 200 basic IEC 61131-3 functions and 
function blocks common to many IEC 61131-3 

based products. These include:

Flip-flops, Counters & Timers

• 

Ladder diagram functions – coils and contacts, 

• 

etc.

Numerical, Arithmetic & Boolean functions 

• 

– Sine, Cosine, Add, Sub, Square Root, And, 

Or, etc.

Selection & Comparison – Min, Max, Greater 

• 

than, Equal, Less than, etc.

Type conversions – Integer to Real, Boolean to 

• 

Word, etc.

In addition to the basic functions and function 

blocks, ControlWave Designer brings the benefit of 
over twenty years of SCADA and plant control expe-
rience in Emerson’s Bristol ACCOL III function block 

library. ACCOL III includes over sixty function blocks 
valuable for use in oil & gas, water & waste and pro-

cess measurement & control applications. Further, 
ACCOL III is designed to take full advantage of the 

significant features offered by ControlWave. 

Briefly, this library includes function blocks for:

Average, Compare, Totalize

• 

Scheduling & Sequencing

• 

PID & Lead/Lag

• 

AGA gas flow and liquids calculations

• 

File handling

• 

In addition, ControlWave ensures data integrity, in 
the event of a communication interruption, by stor-
ing critical time-stamped alarm and historical data 

in the controller memory. This data is then securely 

retrieved when communication is restored.