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MELSEC-A
3 SPECIFICATIONS
3.7 R2 buffer memory list
The entire configuration of the R2 buffer memory is explained in this section.
The contents of the R2 buffer memory are cleared to the default values when the
power is turned OFF.
However, if the user has registered the default values in the R2 EEPROM, the
EEPROM default values will be written in when the power is turned ON.
Refer to section 8.8 for details on writing to the R2 EEPROM.
Refer to the buffer memory list in the following manner.
Name
Default
value
Update
Initializa-
tion
Referenc
e
(7)(1) (2) (3) (4) (5) (6)
EEPROM
registra-
tion
Address
(hexadecimal)
No. Name Details
(1) Address Indicates R2 buffer memory address as a hexadecimal.
(2) Name Indicates the name of the R2 buffer memory.
(3) Default value Indicates the default value at R2 shipment.
(4) Update
Indicates whether the R2 buffer memory value is updated by the master
station or R2.
M station : Updated by the master station
R2 : Updated by R2
Both : Updated by both master station and R2
(5) Initialization
Indicates whether initialization is required when the R2 buffer memory
values have been changed.
Refer to section 8.6 for details on initialization.
Required : Initialization is required.
Not required : Initialization is not required.
(6)
EEPROM
registration
Indicates whether the contents of the R2 buffer memory can be
registered in the R2 EEPROM.
Refer to section 8.8 for details on registering to the EEPROM.
Possible : Registration to the EEPROM is possible.
Not possible : Registration to the EEPROM is not possible.
(7) Reference Indicates the chapter, section or page containing detailed explanations.