Omron M1 Series User Manual page 672

8 Communications Functions
No.
7 CRC-16 (MSB)
8 CRC-16 (LSB)
*1. Note that the register address is 08FF hex, which is 1 less than the register number 0900 hex.
8-6-2
EEPROM Write Mode
• To set the EEPROM write mode, use the Write to Holding Register (06 hex) command etc. to write 1
to the holding register for the EEPROM write mode (0902 hex).
• In the EEPROM write mode, the data changed by the Write to Holding Register (06 hex) command
is written to both the RAM (volatile memory for operation) and the EEPROM (non-volatile memory
for storage). Then, the EEPROM write mode is canceled.
• The EEPROM write mode is canceled also if a command other than the Write to Holding Register
(06 hex) command is received in the EEPROM write mode.
• If a continuous write command is received from Write to Multiple Holding Registers (10 hex) or
Read/Write from/to Multiple Holding Registers (17 hex) in the EEPROM write mode, data writing will
be accepted, but not written to EEPROM.
• When Sysmac Studio is connected online while in the EEPROM write mode, the EEPROM write
mode is canceled.
• If "0: Save to non-volatile memory" is set in Communication Data Storage Selection (y97), this will
always operate corresponding to EEPROM write mode regardless of this register.
• To change parameter y97, the "
 Difference between enter command and EEPROM write mode
Enter command
Master
Parameter change
Parameter change
Parameter change
Enter command
8-22
Field name
key +
3G3M1
Writes data to RAM
Writes data to RAM
Writes data to RAM
900h=1
Writes all data
to EEPROM
Example (hex)
7A
C3
/ keys" must be pressed simultaneously.
EEPROM write mode
Master
EEPROM write
mode enabled
902h=1
Parameter change
Parameter change
M1 Series Standard Type User's Manual (I669)
3G3M1
Writes data to RAM
and EEPROM
(changed data only)
Writes data to RAM
EEPROM write mode is
enabled only for a single
parameter change
operation.