Strategy Window; Function Blocks And Parameters - Allen-Bradley 9308-RSFB64ENE User Manual

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Chapter 2

RSFieldbus Software Basics

Strategy Window

The Strategy window shows a graphic representation of the blocks, parameters,

and links in a control strategy.

To open the Strategy window, you must first create a control module.

See

page 48

for more information.

Functions that can be performed by a device are represented as function blocks.

The set of function blocks available is dependent on the types of devices on your

fieldbus network. Function blocks contain algorithms and algorithm-controlling

parameters.

The standard blocks for fieldbus devices include the following:

• Analog Input (AI)

• Analog Output (AO) • Proportional Derivative (PD)

• Discrete Input (DI)

You can change or set the action of a block by changing the settings of its

parameters. A block parameter that is written to the bus is referred to as an output

parameter. A block parameter that is receiving data is referred to as an input

parameter.

Blocks are linked, or connected, inside the devices. These links let you send data

from one block to the other block. Links connect blocks within the same device

and blocks that are in different devices.

For more information on function blocks, see Chapter 2 in the

FOUNDATION Fieldbus Design Considerations Reference Manual,

publication RSFBUS-RM001.

Rockwell Automation Publication 1757-UM012A-EN-P - July 2011

• Discrete Output (DO)

• Proportional Integral Derivative (PID)

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