ABB Advant Controller 450 User Manual

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The Processor Module PM511 contains the total amount of RAM (Random Access Memory),
which is an 8 or 16 Mbyte dynamic RAM with error correction code. This memory holds the
system program which is in use as well as the controller system configuration and application
program, that is all memory executed in run time.
The system program is described from the organizational viewpoint in Section 1.7.2, Product
Structure, under the heading Functional Modularization. The functional content is treated in the
next section, Section 1.7.3.3, Program Module Contents.
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The system program is backed up in flash PROM and automatically loaded to the RAM in
connection to system start. Physically, the standard system software is stored in a program card
(PCMCIA). The basic system program card must always be located in the CPU as illustrated in
Figure 1-10 below. Normally the program card should be in place during operation.
The program card must be in place in order to start-up the backup CPU of a redundant pair.
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ABB Advant Controller 450 Specifications

General

Brand	ABB
Model	Advant Controller 450
Category	Controller
Language	English