ABB AC 800M

Control Software Section 1 Introduction
38 3BSE 027 941 R301
The RAM included in the processor unit provides an automatic "Shadow-memory"
function for detection of arbitrary bit errors in the memory.
• All memory updates are written to both the primary memory and to the
"shadow" memory in parallel.
• At every memory read cycle, the data from tho two memories is compared.
• If there is a mismatch in the data a changeover is forced.
The "shadow" memory handling is done in hardware and without any delay to the
memory cycle time.
Control Software
The software used by the AC 800M Controller is named Control Software.
This name does not stand for a specific software package; is merely a generic name
for the scope of functions used in a controller. These functions are provided by:
• hardware functions (supervision, communication buses, I/O buses)
• firmware functions loaded into the controller (real time executive system, real
time clock, redundant communication)
• application programs loaded into the controller (library functions,
communication protocols)
To produce an application, it is necessary to use the Control Builder M tool. This
tool is extremely versatile, having many useful functions in addition to system
configuration.
Ethernet Address
Each TB830 Baseplate is provided with a unique Ethernet address that provides
every CPU with a hardware identity.
This functionality takes the form of two identification addresses residing in the non-
volatile memory of the TP830 Baseplate. The lowest address (a 12 character Hex
code) is located on an adhesive label attached to the TP830 Baseplate. The
remaining address is the lowest +1. See Figure 7 on page 39 for label location
details.