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Type
Index registers
The number of points noted above is the number reserved as the calculation memory. The actual number of
1)
points available for use is determined by the hardware configuration.
There are two memory types, the hold type that saves the conditions that exist just before turning the power
2)
off or changing from RUN to PROG mode, and the non−hold type that resets them. Standard type CPU: The
hold and non-hold type memory area is fixed and allotted the numbers as shown below. CPU types with
clock/calendar function: The hold and non−hold type memory areas can be changed by setting the system
registers.
The number of points for timer and counter relays can be changed using system register 5. The numbers in
3)
the table are the default settings.
Hold and non-hold type memory areas
Memory area
Timer relays
Counter
Non-hold type
relays
Hold type
Internal
Non-hold type
relays
Hold type
Data
Non-hold type
registers
Hold type
A battery must be installed.
1)
40.7.6 Relays and memory areas for FP2
Relays [bits]
Type
External input relays
External output relays
Internal relays
1)
Link relays
1)
Timer relays
1) 2)
Counter relays
1) 2)
Memory
Available address area
size
F/P
1
DI0
Standard type CPU
Non-hold type
Memory
Available address area
size
F/P
2048
X0–X127F
2048
Y0–Y127F
4048
R0–R252F
2048
L0–L127F
1024
T0–T999/
C1000–C1023
1024
C1000–C1023/
T0–T999
IEC
%MD6.0
Data memory used to modify
constants and memory area
addresses.
CPU types with clock/calendar function
Non-hold type
From specified value to C139
4 points (elapsed values) (C140–C143)
976 points (R0–R60F)
61 words (WR0–WR60)
32 points (R610–R62F)
2 words (WR61–WR62)
1652 words (DT0–DT1651)
8 words (DT1652–DT1659)
IEC
%IX0.0–
Turn on or off based on external
%IX127.15
input.
%QX0.0–
Turn on or off external outputs
%QX127.15
based on the operation result.
%MX0.0–
Used internally by the PLC
%MX0.252.15
program to store bit information.
%MX7.0.0–
Shared by multiple PLCs
%MX7.127.15
connected using PLC link.
%MX1.0–
Turn on when the value set with
%MX1.999/
a TM instruction for the timer with
%MX2.1000–
the same number has reached 0.
%MX2.1023
%MX2.1000–
Turn on when the value set with
%MX2.1023/
a CT instruction for the counter
%MX1.0–
with the same number has
%MX1.999
reached 0.
Appendix Programming Information
Function
1)
Function
1265
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