Chapter 2 Fbs-Plc Memory Allocation; Fb S -Plc Memory Allocation - FATEK FBS Series Manual

Chapter 2 FBs-PLC Memory Allocation

2.1 FB -PLC Memory Allocation
S
X(256)
Y(256)
T(256)
C(256)
DISCRETE
STATUS
TR(40)
AREA
(4096)
S(1000)
M(2002)
T(256)
C(256)
R(3840)
REGISTER
AREA
D(4096)
(20040W)
IR , OR
SR(328)
R or ROR
(3072)
F(8192)
LADDER
PROGRAM
AREA
(32KW)
Memory Buffer in PLC
SRAM
X0
X255
Y0
Y255
T0
T255
C0
Save status
C255
Load status
S0
S999
M0
M2001
T0
T255
C0
C255
R0
R3839
D0
Save Register
Load Register
D4095
R3840
R4167
R5000
F0
F8191
LADDER
PROGRAM
(20KW)
Save Program
LABEL
Load Program
(1KW)
ROR
(3KW)
DOC
(8KW)
Remark:
FB -PACK 1. When the Read Only Register (ROR)
S
X0
X255
Y0
Y255
T0
T255
C0
C255
S0
S999
M0
M2001
T0
T255
C0
C255
R0
R3839
D0
D4095
R3840
R4167
R5000
F0
F8191
LADDER
PROGRAM
(20KW)
LABEL
(1KW)
ROR
(3KW)
DOC
(8KW)
PP/Winproladder
2 - 1
has been configured by the user, the
contents of R5000～R8071 (depends
on the quantity of configuration) will
be loaded from the ROR's during
each time of power up or changing
from STOP to RUN mode.
The user can access the ROR through
the corresponding R5000～R8071.
Write operation of function
instructions are prohibited in this
ROR area of corresponding R5000～
R8071. The others of R5000～R8071
that have not been configured for
ROR, they can work as general
purpose registers.
2. There is a dedicated area of program
memory to store the contents of
Read Only Register.
ROR can be configured up to 3072
words in maximum.