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M4557 - Model 9210 Nitriding Controller
SSi Manual SERIES 9210-M4557-Nitriding Page 19 of 19
The Advantech TPC-642S/642-SE touch screen operator interface utilizing a Compact Flash card allows the
unit to data log the parameters setup by a qualified SSi technician. Should a customer not take the data
offline in a timely manner, the data will be over-written, the oldest data being that which is over-written
first. The following is a description on how this data log system works:
1. When the Advantech operator interface detects that there is less than 5% disk space left on the
Compact Flash card, an alarm will be displayed on the main interface screen stating "x% disk space
remaining (overwrite at 3%)". In the upper right corner, an ALM is indicated, but because it is not a
communications alarm or a 9210 device alarm, the background remains green. This alarm will remain
active until more than 5% of disk space is available for writing data log files.
2. If the user does not copy the log data from the disk, it will eventually fall to 2% disk space. At this
point, the touch screen will select the oldest compressed file and delete it. It then checks to see if 3%
remains. It repeats this procedure until 3% disk space remains. At this point the alarm message changes
to "Overwriting data log data!". Because this allows the system to seesaw between 2% and 3%, it will
continue to display "Overwriting data log data!" until somebody offloads the files.
Technical concerns and details:
1. If there are not enough compressed files to bring the free space up to 3%, the system will hunt down
and kill hourly files. This should only happen if compression would not be running for some reason.
2. If all compressed files and hourly files have been removed and there is still not enough disk space
(perhaps a problem with the Compact Flash card), the data logger will not write to the disk until the
condition is remedied. (Alarms continues to display)
3. The data log data alarm is the lowest priority. The alarm priorities are touch-screen communications,
then 9210 controller/programmer, then disk space.
Warning: Make sure that the 9210 application has been shut down before removing
the flash card
!