Instruction manual

5. RKC COMMUNICATION PROTOCOL
IMR01H02-E3
42
Continued from the previous page.
Name Iden-
tifier
No. of
digits
Data range Factory set
value
Attri-
bute
CH
EEPROM storage
mode
1
EB
1 0: Backup mode
(Set values are store to
the EEPROM)
1: Buffer mode
(No set values are store to
the EEPROM)
0R/W
−
EEPROM storage
status
2
EM
1 0: The content of the EEPROM
does not coincide with that of
the memory.
1: The content of the EEPROM
coincides with that of the
memory.
----- RO
−
1
The non-volatile memory (EEPROM) has limitations on the number of memory rewrite times.
If the buffer mode is selected as an EEPROM storage mode, all of the set values changed are not
written to the EEPROM and thus a problem of limitations on the number of memory rewrite times
can be solved. When the memory is used to frequently change the set value via communication,
select the buffer mode.
When selecting any EEPROM storage mode, take notice of the following.
• If power failure occurs while the buffer mode is selected, the set value returns to the value before
the storage mode is selected.
• If the buffer mode is changed to the backup mode, all of the set values at that time are stored to
the EEPROM. If necessary to backup the final value of each set item, select the backup mode.
• When the power is turned on, the backup mode is always set.
2
The contents of the buffer memory and those of the EEPROM can be checked.
When data is 0: The contents of the buffer memory do not match with those of the EEPROM.
• As data is being written to the EEPROM in backup mode, do not turn the power
off. If turned off, no set values are stored.
• If the set value is changed after the backup mode is changed to the buffer mode,
0 is set (mismatch). As the set value changed is not backup, select the backup
mode if necessary.
When data is 1: The contents of the buffer memory match with those of the EEPROM.
(Data write to the EEPROM is completed.)
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