PLOTTING ROUTINES
Section 14, Page 3 May 2002
For each plot type the user is asked to input a starting block number for the data. This number is
the first block in the range of data that is to be used for the requested plot. The user is not asked
to enter an ending block since this number is fixed to the block number that was being viewed
when the plot option was invoked. The ending block number is the number of the block the user
is viewing when he originally presses the key.
The GDP-32
II
assumes that there are valid data blocks in the range of blocks requested
(excluding header blocks). If there is data within this range of a different type than the type of
data in the ending block, the plot program will skip the non-conforming blocks. However, the
GDP cannot recognize a block corrupted due to a system failure (e.g. a block partially written),
and will generate an error message.
A skip flag has been implemented to plot around corrupted data blocks or blocks of the wrong
type. By pressing
an "x" is placed between the data version number and the date in the
header for the block being viewed. This flag is recognized by the plot routines and flagged data
will be not be included when plotting multiple blocks. Repeated pressing of
will
remove and replace the "x".
After selecting a range of data blocks to display, the user is asked which channel to use for the
plot. After the user selects a channel, the system checks the blocks in the range requested to
make sure that at least one or more blocks (depending upon the data type) have the channel
number requested for the plot. If this is not the case, an error message will be displayed (see
Section 14.4. ERROR MESSAGES).
If the user selects CHANNEL ZERO (ALL CHANNELS), the program will plot all the
channels one at a time, for which there is legal data. An error message will be displayed for
channels containing insufficient or illegal data.
After the plot window is completely drawn, pressing any key continues program operation. If
only one channel is selected and no errors are found, the user is returned to the FIELDATA
cache. If all channels are selected, data for the next channel is plotted. Pressing
Escape
will
terminate plotting and return to the data view mode.
Function Key operation is identical to other programs:
Escape
backs up one menu and
exits the DATA mode of operation.
NOTE: To make a screen plot of the data, attach an Epson compatible printer to the parallel
port and press . The plot on the LCD will be printed.
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