YASKAWA GPD 506/P5, Техническое руководство

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Setting Parameters for Communication 5-5
‘ENTER’ Command
The GPD 506 has two types of memory: ‘Volatile’ and ‘Non-Volatile’. Data held in the Volatile
memory will be lost when power is removed from the drive. Data held in Non-Volatile memory will
be retained when power is removed from the drive. Different types of registers are stored in different
areas of memory.
Command Data:
The command registers (001h to 009h) are stored in Volatile memory. When writing to a command
register the new data becomes active immediately. In the case of a power loss all data stored in
these registers will
not be retained.
Monitor Data:
The monitor registers (020h to 03Dh) are stored in Volatile memory. These registers can not be
written to (read only registers). Any data read from the monitor registers will
not be retained during
a power loss situation.
Parameter Data:
The parameter registers (101h to 174h) are stored in Non-Volatile memory. When writing new data
to parameter registers, the new data is written immediately, however the new data is stored in
Volatile memory. Sending the ‘ENTER’ command will save the new data in Non-Volatile memory.
The new data takes effect after the drive has been stopped and restarted, except for registers 112h
to 115h, in which case the data is effective immediately.
The ‘ENTER’ command is accomplished by writing the value of ‘0’ to register 900h.
If power loss occurs after the new data has been saved into Non-Volatile memory, by using the
‘ENTER’ command, the data will be retained.
NOTE
Use the ‘ENTER’ command only when necessary!
The life of the Non-Volatile EEPROM on the GPD 506 will support a finite number of operations.
This means that the ‘ENTER’ command can only be used a maximum of a 100,000 times to store
data in the EEPROM. After the specified number of operations, the EEPROM may fault (CPF4)
requiring the GPD 506 control board to be replaced.