7-13
Chapter 7. CPL Communication Function
7 - 4 Definition of Word Addresses
RAM and EEPROM areas of data addresses
Word addresses are categorized as follows:
Word address
(Hexadecimal)
Name Notes
273W to 14859W
(0111 to 3A0B)
RAM access word
address
Reading and writing of these addresses
are both performed on RAM.
Since writing is not performed to
EEPROM, the value returns to that stored
in EEPROM when the power is turned off
and back on.
16657W to 31243W
(4111 to 7A0B)
EEPROM access
word address
Writing is performed to both RAM and
EEPROM, but reading is performed only
on RAM.
Since writing is also performed to
EEPROM, the value does not change even
when the power is turned off and back
on.
Handling Precautions:
• The number of EEPROM erase/write cycles is limited (about 100,000 cycles).
Accordingly, it is recommended that very frequently written parameters be
written to RAM, which does not have a limitation on cycles. Note, however,
that the data written to the RAM area is overwritten with the EEPROM area
data when the power is turned on.
Write data range
If the value to be written is outside the range specified for the parameter, the value
is not written and a termination code indicating error is returned.
Write conditions
A termination code indicating an error is also returned if the conditions for writing
are not satisfied.
To Next Page
Loading...
