Siemens MXL-IQ - History Download Sequence

6-14
History Log
configuration is changed. If the .IMH file is
present after the first download of a con-
figuration, the operation will run more
quickly on subsequent downloads.
History Download Sequence
The download process uses the existing
capabilities of the CSG-M programming
system. The sequence for extracting history
log events is as follows:
1. PC contacts the MXL-IQ and requests
the configuration header and data area
pointers.
2. If the PC determines that there is history
data present, then the extraction process
begins.
3. The PC computes the required amount
of storage and determines if the media in
the PC has enough room for it. If there is
sufficient room, the process continues; if
not, the user is prompted to change
disks.
4. The PC creates a raw data file that
contains an identifying header.
5. The PC downloads the compressed
history log data and appends it to the file.
6. The PC downloads the configuration
data and appends it to the file.
7. The resulting file is closed and then
tested for integrity. Any irregularity in this
validation ends the extraction process
and signals the user.
8. If this is a non-destructive download,
then the process is complete.
If this is a destructive download, then
the clearing of the history log in the
MXL-IQ begins. A warm reset occurs in
the MXL-IQ at the end of the extraction
process.