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MELSEC-
A
5 PRELIMINARY INFORMATION
(e) EEPROM function area (
R2
24H to 27H)
This area is used to initialize the EEPROM, and to register, call and delete
the user registration frames.
When the EEPROM is not to be initialized, or when the user registration
frames are not to be registered, called or deleted, the transmission size
(
R2
24H) can be set to "0".
1) Update timing (Update direction: Master station to R2)
The master station data is stored in the R2 buffer memory at the
following timing.
•
Immediately after the R2 detects that the EEPROM function
request signal (RYn7) has turned from OFF to ON.
R2
Transmit after R2 detects
EEPROM function request ON!
1) EEPROM function
request ON!
Master station
3) User registration frame
data, etc.
2) EEPROM function
request ON confirmed!
(f) User registration frame area (
R2
28H to 2BH)
This area is used to store the user registration frame data after the
EEPROM has been initialized, or the user registration frames have been
registered, called or deleted with the EEPROM function area.
If the user registration frame state is not to be confirmed, the transmission
size (
R2
28H) can be set to "0".
1) Update timing (Update direction: R2 to master station)
The R2 buffer memory data is stored in the master station at the
following timing.
•
Just before the R2 turns the EEPROM function normal complete
signal (RXn7)/EEPROM function error complete signal (RXn8) ON.
R2
Transmit just before EEPROM
function normal (error) complete
turns ON!
Master station
1) User registration frame
data
2) EEPROM function normal
(error) complete ON!