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The internal structure of the DREAM 2 is very much like the structure of a desktop
personal computer that has an operating system which handles multiple applications
simultaneously. This kind of activity is naturally involved with opening of multiple
files as required by the active applications. As in PCs, cutting the power before
closing the open files may be a harmful action and therefore should be avoided. For
this reason we are not supposed to turn off the power switch of the controller before
the software was commanded to shut down.
The software Shutdown button is located at the Function Bar of the System
Manager screens, which can be reached from any of the DREAM 2 application
screens, by pushing simultaneously the PgDn (˅) and PgUp (˄) buttons.
Pushing the F3=Shutdown button is the only safe way for shutting down the
DREAM 2 controller. Shutting down takes time, it is necessary to wait until the lights
on the CPU board turn off. Only after the lights on the CPU went off, it is safe to
switch off the Power Switch (see below).
The Shutdown software key turns the DREAM 2 system OFF.
The Reboot software key turns the DREAM 2 system OFF and then ON
again.
The Reboot and Shutdown functions are activated by pushing the red function
keys located underneath the Function Bar of the screen. Both functions preserve all
the data included in the controller except the statuses and left quantities of
programs.
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