Eaton XC200 Series, User Manual

Page: 23 / 82

10/10 MN05003004Z-EN
19
3 CPU operation
Startup behaviour
After the supply voltage is switched on the CPU will carry out a
self-test and several CRC checks. If a fault is detected, it will
remain in the “Switch-on not OK” state,
a chapter “Operating
states” on page 41. After the tests have been successfully
completed, the operating system (OS) takes over the
communication with the programming system as well as execution
and debugging of the application program. It only supports one
application program.
Figure 20: Startup behaviour
BTS MMC k BTS PLC?
BTS in MMC?
Power on
yes
No
yes
no
PLC Start
BTS MMC a PLC
Application will be deleted
Default settings:
38,4 KB COM1
125 KB CAN
127 CAN Node ID
Boot project MCC
=
Main memory project
(SRAM)
Boot projekt
in
MCC
CPU start
Load project in main memory
(SRAM),
prepare cold start
RUN/STOP switch
in
RUN?
yes
yes
NOT READY
Executable
project in
working memory
(SRAM)
No
yes
READY RUN
No
No
yes
No