8.1
CPU Unit Specifications
8-9
Name
Usable devices and ranges
Functions
Index register
I
15 double words (I0 to IE)
(with a switching function)
Register can be used as an address of
memory area and constants modifier.
Timer set value
area
TS
4,096 double words
(TS0 to TS4095) (Note 2)
Data memory for storing timer target
data. It corresponds to the timer number.
Timer elapsed
value area
TE
4,096 double words
(TE0 to TE4095) (Note 2)
Data memory for storing timer elapsed
value. It corresponds to the timer
number.
Counter set value
area
CS
4,096 double words
(CS0 to CS4095) (Note 2)
Data memory for storing counter set
value. It corresponds to the counter
number.
32-bit device
Counter elapsed
value area
CE
4,096 double words
(CE0 to CE4095) (Note 2)
Data memory for storing the elapsed
value during operation of a counter. It
corresponds to the timer number.
K-32768 to K32767
(for 16-bit operation)
Signed decimal
constants
K
K-2147483648 to K2147483647
(for 32-bit operation)
U 0 to U65535
(for 16-bit operation)
Unsigned decimal
constants
U
U 0 to U4294967295
(for 32-bit operation)
H0 to HFFFF
(for 16-bit operation)
Hexadecimal
constants
H
H0 to HFFFFFFFF
(for 32-bit operation)
SF-1.175494 × 10
-38
to SF-3.402823 × 10
38
Single precision
floating point
number (real
number)
SF
SF-1.175494×10
-38
to SF-3.402823×10
38
DF-2.2250738585072014 × 10
-308
to DF-1.7976931348623158 × 10
308
Constant
Double precision
floating point
number (real
number)
DF
DF 2.2250738585072014 × 10
-308
to DF 1.7976931348623158 × 10
308
(Note 1) Figures in the table indicate the number of devices that can be used in the program. The actual inputs and
outputs that can be used vary by configuration.
(Note 2) Operation devices are categorized into "hold type", which memorizes the status immediately before power
failure or switch to the PROG. mode, and "non-hold type", which resets such status. Non-hold area is cleared to
zero when the unit is powered on or the mode is switched between PROG and RUN.
Types of operation devices
Hold or Non-hold
Internal relays (R), Data registers (DT), Link relays (L), Link registers
(LD)
Can be set as non-hold type or
hold type by the tool software.
However, data registers that can
be used as hold type are a
maximum of 262,144 words.
Counters (C), Counter set values (CS), Counter elapsed values (CE),
Error alarm relays (E)
Hold type
Inputs (X), Outputs (Y), Timers (T), Timer set values (TS), Timer
elapsed values (TE), Pulse relays (P), Direct inputs (IN), Direct
outputs (OT), Index registers (I), Unit memories (UM), System data
registers (SD)
Non-hold type
(Note 3) Direct inputs (IN), direct outputs (OT), and unit memories (UM) are used by specifying unit slot numbers and
memory addresses to be controlled by instructions.
(Note 4) The number of usable data registers (DT) varies according to the type of CPU and memory configuration
settings.
Memory select pattern
Unit type
Memory type
1
2
3
4
5
CPS4*
Data register capacity (word)
65,536 131,072
262,144
524,288 999,424
CPS3*
Data register capacity (word)
131,072
262,144
425,985
589,824
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