Chapter 15 Pt 6

A function block program, or routine, consists of

Function blocks References Wire connectors Wires

____ represent tags that are linked to values stored in a controller's memory

References

A _____ indicates a Boolean signal path (0 or 1)

dash line

Wire connectors are also used to connect function blocks that are on a ____ of the same function block routine

different sheet

When there are many function blocks on a sheet, or the function blocks are _____, wire connectors used in place of wires can make the logic easier to read

far apart

To create a ____ around a block, wire an output pin of the block to an input pin of the same block

feedback loop

A _____ is a graphical depiction of process flow using simple and complex interconnecting blocks

function block diagram (FBD)

function block diagram (FBD) similar to a ladder logic diagram, except that ______ the interconnection of ____ and the ____

function blocks replace, contacts, coils

When a ____ of function blocks are in a feedback loop, the controller cannot determine which block to execute first

group

An _____ or ___ is used to receive a value from an input device or tag

input reference, IREF

If you use an IREF to specify input data for a function the data in that IREF are ____ (won't change) for the scan of the function block routine

latched

The _____ of the link between function blocks indicates what type of data are present

line type

An ____ or ____ is used to send a value to an output device or tag

output reference, OREF

Each ___wire connector must have at least one corresponding ____ wire connector

output, input

A ____ indicates an integer or real value

solid line

Each output wire connector requires a ____ name and the corresponding input connector must have the same name

unique tag

A function block routine executes in the following order

-The controller latches all data values in IREFs -The controller executes the other function blocks in order -The controller writes outputs in OREF

_____ on a wire from wire connectors or input references, move through the function block, and then pass on to an output reference

Data flow

______ refers to how the controller verifies that the data present at the input to a function block are valid

Data latching

_____ input wire connectors can reference the same output wire connector

Multiple

____ are used to create a path without using a wire

Wire connectors

A function block circuit is _____ to an electrical circuit where links and wires depict signal paths between components

analogous

Function blocks can be ____ to other function blocks by connecting their outputs to the input of another function block using wires and pins

connected

When you use an IREF or an OREF you must _____ or assign an existing tag to the element

create a tag