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Watkiss DigiVAC Service Manual - Issue 2 - 29/11/04
Electronics & Software
•
Software - GUI Control Panel
Software updates will normally only affect the application software, as this has
a direct impact on the machine’s operation. There are several methods of pro-
gramming the software into the GUI CPU (see Figure 4:3).
Figure 4:3 Updating the Software in the GUI CPU.
The boot firmware and application software are stored in the flash memory.
Each time the machine is switched on, the boot firmware loads the application
software into the ‘run memory’, so that the machine can operate (see Figure
4:4). The run memory does not store information once the power is switched
off, hence the need for the flash memory.
Figure 4:4 Flow Diagram For Installing GUI Software.
The boot firmware is also used to install new versions of the application
software. The boot firmware can be accessed by connecting a computer via the
serial port or ethernet connection. The computer is used as a terminal and the
boot firmware gives the operator various options to choose from when
updating the application software (see Section 4.4.7).
PC
GUI CPU
Ethernet
Serial Port
Download
from Internet
CD-ROM
Memory Card
Memory Card
Programmer
Floppy Disk
LATEST VERSION OF
SOFTWARE
GUI CPU DOWNLOAD
CACHE
(Erased when Digi-
VAC is switched off)
GUI CPU FLASH
MEMORY
(Stores software when
DigiVAC is switched
off)
GUI CPU RUN MEMORY
(Erased each time
DigiVAC is switched
off)
Transferred to GUI CPU via Serial Port, Ethernet
or Memory Card
Uncompressed software can be
transferred directly to Run Memory
Software transferred to
Run Memory each time
DigiVAC is switched on
Содержание DigiVAC
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