USE OF THE EEPROM MEMORY
A knowledge of how to use an EEPROM memory circuit is important since the inverter related parameters and the appli¬cation program data are stored in the EEPROM. A completely different inverter application can be implemented only by changing the EEPROM circuit.
When auxiliary voltages are connected to the control card and the EEPROM circuit contains data, the control function is instantly ready for use.
A write enable and disable state of the EEPROM memory circuit is dependent on the position of the selector plug S4. When S4 is in the a-b position, write is enabled, and when it is in the a-c position, write is disabled. If an attempt is made to write to the memory when the selector is in the disabled position, the status message SA 52 (CP1) or "NO WR TO EEPROM" (CP2) is displayed. The message is turned off when EEPROMLOCK 8T is set to zero. A write disable mode can be used when it is desired to avoid an un change of EEPROM memory content due to misuse or malfunction