July 2008
Intermediate to advanced
544 pages
16h 52m
English
Content preview from Computers as Components, 2nd Edition
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460 CHAPTER 9 System Design Techniques
new Mode/energy information. Apparently, the software included no checks to detect the
incompatible data.
After the Mode/energy data are set, the software sends parameters to a digital/analog
converter and then calls a Magnet subroutine to set the bending magnets. Setting the magnets
takes about 8 seconds and a subroutine called Ptime is used to introduce a time delay. Due to
the way that Datent, Magnet, and Ptime are written, it is possible that changes to the parameters
made by the user can be shown on the screen but will not be sensed by Datent. One accident
occurred when the operator initially entered Mode/energy ...