Erasing (Releasing) Chromatogram Data - ABB PGC2000 Operation And Service Manual

2. On the Display Saved Data screen, cursor to MEMORY USED/LEFT and press the F2 (Execute
the Command) soft key. The Raw Chromatogram Memory Used/Left screen will appear (see
Figure 4-53).
Total Used = 038208 bytes
Total Left = 272916 bytes
Type/Lock Num Stream
Current U 01
Last
Alarm
Calibrate 01
Bench
This screen shows the total memory used and left, and the amount used by each saved
chromatogram. The available GCC memory resides in two separate "pools" that cannot be shared:
memory available for saving raw chromatograms (304KB), and memory available for building
operational tables and saving the Raw Data Reports with the chromatograms (192KB).
The GCC saves the current analysis. At cycle end, the GCC determines if its program specifies the
analysis just saved as a type to be automatically saved. If it does not specify it for automatic saving,
the GCC erases the current analysis data from memory.
Chromatogram storage uses from 2 to 4 KB of memory for each minute of analysis cycle. When
estimating the memory needed, calculate 4 KB/cycle minute (e.g., 20 KB for a 5 minute cycle, 80 KB
for a 20 minute cycle). Alarms and warning signals indicate when either memory pool runs low. The
GCC displays the message NOT ENOUGH MEMORY, NOT SAVED if the 304KB pool empties or
runs low.
If the GCC does not have enough memory, you must erase (release) some saved data. This screen
identifies analyses saved and memory used under "Type/Lock." You can erase all saved analyses or
one saved analysis at a time (see next subsection).

Erasing (Releasing) Chromatogram Data

When the GCC does not have sufficient memory to save new chromatogram data, you must erase
(release from memory) existing chromatograms. First you must identify which chromatograms to
erase. Then perform the following steps to erase these chromatograms:
1. Press the F1 soft key as necessary to return to the Commands screen.
2. Cursor to CHROMATOGRAM STORAGE and press the F2 (Define Save And Release) soft key.
4-61
**** Raw Chromatogram Memory Used/Left
05
01 04
01 02
10
01 09
Escape
F1 F2
Figure 4-53. MEMORY USED SCREEN
Start End Bytes
Time Time Used
0000 0127 004678
0000 0155 006654
0000 0245 010244
0000 0245 009756
0000 0155 006876
F3
****
F4
2000-OSM, F1