180
AO2000
CONTINUOUS GAS ANALYZERS | OI/AO2000-EN REV. B
Gas analyzer configuration: Function blocks
The 'Function blocks' 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 setting
parameters 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
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.
Various function blocks are factory-linked to other function blocks to make
applications (see the "Standard configuration" (see page 181) section).
Parameter assignment of function blocks
Various specific parameters, in addition to input and output linking, deter-
mine the functionality of a block.
The as-delivered gas analyzer has standard values assigned to these param-
eters. These standard values can be accepted or reprogrammed.
Password
The level 3 password (see page 149) must be entered in order to config-
ure an application. Make sure that existing application configurations and
links are not damaged or deleted.
Complete information
Technical Bulletin "Function Blocks – Descriptions and configuration" con-
tains complete information on the "Function block" concept as well as de-
tailed descriptions of the individual function blocks.
