SIREC D Display Recorder 7ND4000

Operation
3.4 BROWSING
3.4.1 General. Once at the full trend screen
(using the VIEW button), the user can choose to
browse, search or compress either data from the
disk, including the file currently being recorded to
disk, or immediate past data which is buffered to
memory (RAM). The operation of browsing is the
same whether the user is browsing memory or file
data.
A. Brows Menu - When BROWS is pressed a
new button bar is presented with three buttons,
FILE , RAM and EXIT as shown in Figure 3-19.
B. Browsing a File - Select FILE to browse
prerecorded files on the disk, RAM to browse
Trend data from memory, or EXIT to return to the
real time view. Browsing allows the user to view
historic data of the pens currently trending on the
display or saved on the disk, without affecting any
real time data acquisition. Alarm data can also be
browsed from memory by selecting BROWS on the
full view Alarm window. See Paragraph 3.3.6 for
the added step required to browse from disk.
C. Brows Mode Button Bar - On the Trend
screen, pressing BROWS brings up the Browse
Source button bar. Press RAM to browse memory
or FILE to browse from disk. This brings up the
Browse Mode Button Bar shown below (Figure 3-
20).
1. The FINDV and FINDT buttons initiate the
SEARCH functions. FINDV is FIND by Value,
FINDT is to FIND by Time.
2. The “��“ and “��” are to COMPRESS and
EXPAND data respectively.
3. BROWS allows you to enter the interactive
Browse Screen.
4. EXIT returns you to the prior screen.
3-10
F IL E R A M 04/ 16 /97 4 :5 9:2 9 E X IT
Figure 3-19 The Browse Source Button Bar
Figure 3-20 The Browse Mode Button Bar
3.4.2 COMPRESSING DATA. The
data on the screen may be compressed up to 32
times the normal view. This enables long term
trends to be seen on a single screen. Each time the
“��“ (Compress) button is pressed the data is
compressed by a factor of 2, and it may require a
short time for the recorder to process the data. Five
presses give the maximum 32 times compression.
The data may be expanded back by pressing the
“��” (Expand) button. The user can enter the
interactive browse mode with any level of
compression by simply pressing the BROWS
button.
3.4.3 SEARCHING DATA BY TIME.
The historic data can be searched by time, by
pressing the FINDT (FIND Time) button. This will
bring up a transient window showing the time to be
searched. If the displayed time is correct press
ENTER, if not press NO. This will bring up a series
of windows to allow the required time to be
entered. The Date will then be displayed. Press NO
to change or ENTER to accept. The data will be
searched and the sample corresponding to the
required time and date will be placed under the
cursor near the center of the screen. The search
may take some time, especially if searching a large
disk file. If no point is found the unit will display “No
Point Found”. The user can then enter the
interactive browse mode by pressing the BROWS
button.
3.4.4 SEARCHING DATA BY
VALUE. The historic data can be searched by
value. Pressing the FIND (FIND Value) button will
bring up the Search Value button bar shown in
Figure 3-21.
Figure 3-21 The Search Value Button Bar
A. Setting Search Value - To set up the
actual Value to search for, press the VALUE
button. Use the numeric keypad to enter the value
to search for. Note that you cannot search for an
exact match, you will be looking for a value
immediately greater than or less than the value you
enter. Once you have entered the value you want,
press the ENTER button.
Siemens AG C79000-G7374-C211-01
SIREC D Manual