Advant Controller 450 Product Guide
Section 2.1.4 Configuration
3BSE 015 953R201 Rev B 2-3
2.1.4 Configuration
You configure the system in accordance with the hardware and software selected, for example,
the number of I/O boards, communication lines, functional units and PC programs.
This is performed using commands from a configuration tool such as Advant Station 140 (with
AMPL Control Configuration 1.7 or later product versions) and results in the internal
organization and activation of the data base and program areas.
2.1.5 Execution
The execution units in a PC program are normally given cycle times of 10 ms - 2 s
(5 ms - 32 s after reconfiguration). The internal program system (operating system and
PC interpreter) organizes the execution of the units with the periodicity selected, simultaneously
performing other tasks such as communication with a MasterView 320 and programming units.
Ordinarily, you can select the same cycle times for reading in values from digital and analog
boards.
2.1.6 Start-up
The CPU front panel has a rotary switch which you use to select start and working mode.
The normal position of the switch is 1 (AUTO). This means an automatic start when voltage
is switched on or when voltage is recovered after a power failure. At an interruption of voltage,
the system stores all the information necessary for restarting. Whether the system is to continue
operations from its status at the interruption of the voltage or if it is to be reset to zero before
restart is selected with parameters.
The different ways to start are CLEAR, STOP, AUTO or OFF LINE. The way to start is selected
on the basis of the duration of the voltage failure.
You can connect a control module which is activated when the voltage returns and which
executes one cycle to each start alternative. All start modules must belong to the same PC
program. You can define how the process is to start with these control modules.
Alarm can also be blocked at initialization of the I/O boards.
2.2 Process Control
Process control applications are programmed in the ABB Master Programming Language
(AMPL). AMPL is a function-block language with graphic representation.
The building blocks are called PC elements. There is a wide range of PC elements,
from simple AND blocks to complete PID regulators.
Besides the functional PC elements, AMPL also contains several structural elements for
dividing a PC program into suitable modules which can be managed and executed individually.
The controller can be programmed fully on-line, that is, with the program running
and controlling the process.
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