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