System manual CECX / Operating behavior
8.2 Start-up
The start-up of a CPU is divided up into three main stages:
Boot system start-up
Start-up of control firmware
Start-up of application
The progress in each stage is signaled via the 7-segment display. If errors
are detected during the start-up an error message is activated. A short
stroke of the CTRL-key will interrupt the start-up operation.
8.2.1 Display during start-up of the firmware
Status dis-
played
Description
Voltage supply is available (Power-On), hardware initialization of CPU
module occurs.
If this state is maintained for an extended period a hardware error ex-
ists. (Check CF card, if needed change CF card (part from Festo), oth-
erwise send module to Festo)
Hardware initialization; the consistency of the bootblock is being
checked.
Power On Self Test, check of the consistency of the CPU module oc-
curs.
The extended boot system is being loaded and started.
Firmware is loaded from the Compact Flash into the DRAM.
Firmware is being started.
Start-up of the bootblock is completed, the operating system is initial-
ized and started.
Various firmware components (services, I/O-system, communication)
are started.
Autostart query:
If the autostart function has been deactivated, a keystroke (CTRL key)
is expected at this point.
Start-up of the firmware has been completed. The CPU module is now
ready for operation.
If an application is already on the Compact Flash, this will be loaded.
CECX-II 8-2