KEPCO BOP-GL 1KW, Operator'S Manual

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BOP-1K-GL 111315
3.7.3.6 MEMORY SUBSYSTEM
This subsystem controls the Flash Memory used by the BOP microprocessors and is used for
storing setup parameters and for storing a list for later recall and execution
The unit’s configuration, voltage and current, saved setups (*SAV and *RCL command) and Cal-
ibration values are stored in Flash Memory. Since the Flash EEPROM cannot be modified by
writing a single data byte, the block must be erased and then the data written into the correct
locations.
Saved setups are accomplished by the 99 memory locations (groups of settings) which are
stored in the nonvolatile memory. Each setting contains values for: Mode, main channel setting
(voltage or current), Reference setting, positive and negative protect values and External Pro-
tect setting (see Table 3-8).
The BOP accomplishes this by partitioning the Flash memory. As the amount of Flash memory
used becomes larger with each subsequent data update, the Flash memory fills up and needs
to be compressed. The compression of the Flash EEPROM, called packing, is automatically
handled by the BOP microprocessor's code. The packing process can take a half a second to
accomplish. Because it is automatically executed, it can occur after any *SAV or save of Calibra-
tion. When the memory is out of space, the internal microprocessor moves the any data in the
first page to the end of the flash array and then erases the first flash page. The pack process
can take 500 milliseconds to complete. Packing is automatically invoked during power-up initial-
ization if the BOP finds that any storage area is over 90% utilized.
The following statistics are a guide as to when a MEMORY PACK will occur.
• Save area - Approximately 300 *SAV operations can be completed before a PACK will
occur automatically.
• Variable area - around 3000 updates can be completed prior to an automatic PACK
occurring. Variable areas also include serial number updates and password updates.
• Calibration - 64 calibrations can be saved before a PACK is required.