ABB Advant Controller 450 User Manual

$GYDQW

&RQWUROOHU8VHU¶V*XLGH
6HFWLRQ 0HPRU\&DOFXODWLRQ
3BSE 002 415R701 Rev A 3-35
 0HPRU\&DOFXODWLRQ
Advant Controller 450 provides sufficient RAM for most applications (Table 3-9).
Other practical limits are normally attained before RAM is used up. A combination, however, of
huge PC programs, thousands of I/O points and a large number of logs with the shortest possible
log interval requires a lot of RAM. In such cases, you are advised to make a memory estimation
as soon as possible in the preliminary design work.
Empirical formulas are necessary for you to make a quick estimation of the memory
requirement. Table 3-9 for memory requirement calculation is presented below.
Forms for you to use in practice are given in Appendix G, Memory Calculation.
An explanation of the memory requirements of the different functions follows. You can assume
that the items listed include sufficient memory for common applications of a PC element. If the
application concerned has a special requirement in one or more respects, for example, the PC
program can be very complex, it may be necessary to adjust the memory requirements for this.
See the PC element manual for information regarding the memory requirements of individual
PC elements.
When discussing the memory, please note that there is a limit. The local data area available for
each PC program is limited to 32 kByte.
If the application program is well structured, and divided into several PC programs, this limit
normally has no relevance.
Structuring of the application is strongly recommended for other reasons as well. It is the basis
of easily interpreted documentation (for example circuit diagram), effective maintenance and
simple future system enlargement.
([SODQDWLRQRI0HPRU\5HTXLUHPHQW
$,$2 An application with two four-input ADD elements (or other typical elements) is
assumed for each channel.
','2 An application with two four-input AND gates (or other typical gates) is assumed for
each channel.
3,'&21The feedback control loop consists of a PIDCON PC element with all size
parameters set to 1 and one PIDCON data base element.
3,'&21$The feedback control loop consists of a PIDCONA PC element with all size
parameters set to 1 and one PIDCONA data base element.
0$1671The manual station consists of one MANSTN PC element with all size parameters
set to 1 and one MANSTN data base element.
5$7,2671 A RATIOSTN PC element with all size parameters set to 1 and one RATIOSTN
data base element.
*(1&21*(1%,1*(186 'An application corresponding to that in the manual for
functional units is assumed for each functional unit.
9$/9(&21The valve control consists of a VALVECON PC element with all size parameters
set to 1 and one VALVECON data base element.
027&21The motor control consists of a MOTCON PC element with all size parameters set
to 1 and one MOTCON data base element.

ABB Advant Controller 450 Specifications

General

Brand	ABB
Model	Advant Controller 450
Category	Controller
Language	English