42/24-10 EN Rev. 9
Chapter 7: Gas Analyzer Configuration
7-B-1
Section B
Function Blocks
The Function Block Concept
What are function
blocks?
Function blocks are small units of the processing software with a specific function.
Information is taken in at the inputs, processed in specific ways and the results
appear at the block outputs.
What are function
blocks used for?
Function blocks are used for overall and specific configuration and initialization of
gas analyzer functions.
Examples of Function
Blocks
The following examples illustrate the operation of function blocks:
A
Limit value monitor
tracks a value to determine if it violates limit values and
passes the result to a digital output.
A
Digital input
places a signal at a (hardware) digital input for subsequent
processing in other function blocks.
An
Add
function block combines the signals at its two inputs and places the total
at its output.
A
Fan
splits an input signal into several output signals.
A
Component measurement value
outputs the measurement signal from an
analyzer module for subsequent processing in other function blocks.
Application =
Function Block
Linking
A function block is linked to other function blocks via its inputs and outputs.
A sequence of interlinked function blocks forms an application in the gas analyzer.
Various function blocks are factory-linked to other function blocks to make
applications (see the “Standard Configuration” section, page 7-B-2).
Function Block
Initialization
Various specific parameters, in addition to input and output linking, determine the
functionality of a block.
The as-delivered gas analyzer has standard values assigned to these parameters.
These standard values can be accepted or reprogrammed.
Password
The level 3 password must be entered in order to configure an application. Make
sure that existing application configurations and links are not damaged or deleted
when configuring.
Complete Information
Technical Bulletin “AO2000 Function Blocks – Descriptions and Configuration”
(publication number 30/24-200 EN) contains complete information on the “Function
Block” concept as well as detailed descriptions of the individual function blocks.
