Terumo BCT Trima Accel, Service Manual

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Self Test State
The Self Test state starts boot sequence starts with the BIOS self test. This is similar to a PC BIOS self
test, and tests the major processor board components such as the CPU, interrupt controller, timer, and
RAM.
If any of these tests fail, the system displays an error message and aborts the boot sequence. If all tests pass,
control is passed to the boot device. The boot device then loads the vxWorks boot ROM image. The
boot ROM image contains the software required for loading and starting the operating system. It
provides a set of device drivers for accessing the storage device or network device through which the
operating system is loaded.
When the boot ROM image is executed, it first tests for the presence of a keyboard. If a keyboard is
attached, the system enables the loading of a debug vxWorks image that includes the necessary software
components for using the WindRiver development and debugging tools. If the
Esc
key is pressed, the
system enters an alternate boot mode in which booting is stopped immediately after loading the OS
image and drivers. This is signified with a prompt that looks like an arrow: "->." Note that a login or
password is not required when using the keyboard to execute commands from the command line. The
login and password are required to upload files to the machine via FTP.
The OS software uses the pause and stop keys to select Single-Step boot and Service mode. In Single-
Step mode, the system pauses and waits for the technician to press the pause button after each step of the
boot sequence is completed; otherwise the boot proceeds normally. During Single-Step mode, the
technician can login to the machine via FTP after the message "initializing network software" appears on
the screen. Service mode is used for software installation, updates, and machine maintenance.
During the network initialization process, the system start mode is determined: normal boot, Service
mode, or Alt Boot mode. If the system start mode is normal, then the safety board MAC address in the
control computer ARP table is made permanent. This removes any possibility that an ARP update from
the external network interface could overwrite it. Overwriting that MAC address would prevent the
control computer from communicating with the safety computer. Note that this protection is not
provided in Service mode or Alt Boot mode to aid in system troubleshooting.
Version 5.1 Software Description
Trima Accel
®
Automated Blood Collection System • Service Manual 3-7