Omron C200HE Manuel D’Utilisation
24
3-1
Introduction
3-1-1 Data Area Overview
Details, including the name, size, and range of each area are summarized in the
following table. Data and memory areas are normally referred to by their acro-
nyms, e.g., the IR Area, the SR Area, etc.
following table. Data and memory areas are normally referred to by their acro-
nyms, e.g., the IR Area, the SR Area, etc.
Area
Size
Range
Comments
Internal Relay Area 1
3,776 bits
IR 000 to IR 235
Refer to 3-1-2 IR/SR Area Overview and 3-3 IR
(Internal Relay) Area for more details.
(Internal Relay) Area for more details.
Special Relay Area 1
312 bits
SR 236 to SR 255
Refer to 3-1-2 IR/SR Area Overview and 3-4 SR
Special Relay Area 2
704 bits
SR 256 to SR 299
(Special Relay) Area for more details.
Internal Relay Area 2
3,392 bits
IR 300 to IR 511
Refer to 3-1-2 IR/SR Area Overview and 3-3 IR
(Internal Relay) Area for more details.
(Internal Relay) Area for more details.
Temporary Relay Area
8 bits
TR 00 to TR 07
Used to temporarily store and retrieve execution
conditions when programming certain types of
branching ladder diagrams.
conditions when programming certain types of
branching ladder diagrams.
Holding Relay Area
1,600 bits
HR 00 to HR 99
Used to store data and to retain the data values
when the power to the PC is turned OFF.
when the power to the PC is turned OFF.
Auxiliary Relay Area
448 buts
AR 00 to AR 27
Contains flags and bits for special functions. Re-
tains status during power failure.
tains status during power failure.
Link Relay Area
1,024 bits
LR 00 to LR 63
Used for data links in the PC Link System.
(These bits can be used as work words or work
bits when not used in the PC Link System.)
(These bits can be used as work words or work
bits when not used in the PC Link System.)
Timer/Counter Area
512 counters/
timers
timers
TC 000 to TC 511
Used to define timers and counters, and to
access completion flags, PV, and SV.
access completion flags, PV, and SV.
TIM 000 through TIM 015 are refreshed via
interrupt processing as high-speed timers.
interrupt processing as high-speed timers.
Data Memory Area
6,144 words
DM 0000 to DM 6143
Read/Write
DM 6031 is used for indirect DM addressing and
EM bank information and should not be written
by the user.
EM bank information and should not be written
by the user.
1,000 words DM 0000 to DM 0999
Normal DM.
2,600 words DM 1000 to DM 2599
Special I/O Unit Area
3,400 words DM 2600 to DM 5999
Normal DM.
31 words
DM 6000 to DM 6030
History Log
(44 words)
DM 6100 to DM 6143
Link test area (reserved)
Fixed DM Area
512 words
DM 6144 to DM 6599
Fixed DM Area (read only)
56 words
DM 6600 to DM 6655
PC Setup
Extended Data Memory
Area
Area
6,144 words
EM 0000 to EM 6143
The amount of EM area memory depends on the
PC model being used. PCs are available with no
EM, one 6,144-word bank, or three 6,144-word
banks.
PC model being used. PCs are available with no
EM, one 6,144-word bank, or three 6,144-word
banks.
Like DM, the EM memory can be accessed in
word units only and EM area data is retained
when the power to the PC is turned OFF.
word units only and EM area data is retained
when the power to the PC is turned OFF.
Work Bits and Words
When some bits and words in certain data areas are not being used for their in-
tended purpose, they can be used in programming as required to control other
bits. Words and bits available for use in this fashion are called work words and
work bits. Most, but not all, unused bits can be used as work bits. Those that can
be used are described area-by-area in the remainder of this section. Actual ap-
plication of work bits and work words is described in Section 4 Writing and Input-
ting the Program.
tended purpose, they can be used in programming as required to control other
bits. Words and bits available for use in this fashion are called work words and
work bits. Most, but not all, unused bits can be used as work bits. Those that can
be used are described area-by-area in the remainder of this section. Actual ap-
plication of work bits and work words is described in Section 4 Writing and Input-
ting the Program.
Flags and Control Bits
Some data areas contain flags and/or control bits. Flags are bits that are auto-
matically turned ON and OFF to indicate particular operation status. Although
matically turned ON and OFF to indicate particular operation status. Although
Introduction
Section 3-1