1-3
Section 1 PLC Specifications
1-2 PLC Internal Memory
1-2-1 Memory map
Note 1: The size of standard memory, retain memory, user FB memory, and system FB memory may be increased or
decreased by the loader settings. Default values are shown in the figure above. For details of the setting, “2-3-3 (2)
Memory allocation setting.”
Note 2: For the input/output address assignments, refer to “1-2-2 I/O address assignment.”
Note 3: It is possible to set the initial values of standard memory and retain memory using the free space of program memory.
Initial values require 2.5 steps for one address.
%IW %QW
%MW1.0
%MW3.0
%MW8.0
%MW10.0
Input/output memory
(I/Q)
512 words (8192 points)
Standard memory
(M)
4800 words
Retain memory
(M)
2048 words
User FB memory
(M)
2560 words
System FB
instance memory
(M)
4096 words
Inverter communication
memory
(M)
544 words
Program memory
8192 steps
Initial value setting area
for standard memory and
retain memory (Note 3)
Temporary area
4096 words
Note 2
Note 1
(Input) (Output)
System memory
(SM)
512 words
