Omron C200HE Manuel D’Utilisation
29
Bit number
Contents
0
0
1
1
0
0
0
0
0
0
1
1
1
0
0
1
15
14
13
12
11
10
09
08
07
06
05
04
03
02
01
00
1. First take the absolute value (12345) and convert to unsigned binary:
Bit number
Contents
1
1
0
0
1
1
1
1
1
1
0
0
0
1
1
0
15
14
13
12
11
10
09
08
07
06
05
04
03
02
01
00
2. Next take the complement:
Bit number
Contents
1
1
0
0
1
1
1
1
1
1
0
0
0
1
1
1
15
14
13
12
11
10
09
08
07
06
05
04
03
02
01
00
3. Finally add one:
Reverse the procedure to convert negative signed binary data to decimal.
3-3
IR (Internal Relay) Area
The IR area is used both as data to control I/O points, and as work bits to manipu-
late and store data internally. It is accessible both by bit and by word. In the
C200HX/HG/HE PC, the IR area is comprised of words IR 000 to IR 235 (IR
area 1) and IR 300 to IR 511 (IR area 2). Basic instructions have somewhat long-
er execution times when they access IR area 2 rather than IR area 1.
late and store data internally. It is accessible both by bit and by word. In the
C200HX/HG/HE PC, the IR area is comprised of words IR 000 to IR 235 (IR
area 1) and IR 300 to IR 511 (IR area 2). Basic instructions have somewhat long-
er execution times when they access IR area 2 rather than IR area 1.
Words in the IR area that are used to control I/O points are called I/O words. Bits
in I/O words are called I/O bits. Bits in the IR area which are not assigned as I/O
bits can be used as work bits. IR area work bits are reset when power is inter-
rupted or PC operation is stopped.
in I/O words are called I/O bits. Bits in the IR area which are not assigned as I/O
bits can be used as work bits. IR area work bits are reset when power is inter-
rupted or PC operation is stopped.
Area
Range
IR Area 1
I/O Area 1
IR 000 to IR 029
Group-2 High-density I/O Unit Area 1
and B7A Interface Unit Area
and B7A Interface Unit Area
IR 030 to IR 049
SYSMAC BUS and CompoBus/D Output
Area
Area
IR 050 to IR 099
Special I/O Unit Area 1
IR 100 to IR 199
Optical I/O Unit and I/O Terminal Area
IR 200 to IR 231
Work Area
IR 232 to IR 235
IR Area 2
I/O Area 2
IR 300 to IR 309
Work Area
IR 310 to IR 329
Group-2 High-density I/O Unit Area 2
IR 330 to IR 341
Work Area
IR 342 to IR 349
CompoBus/D Input Area
IR 350 to IR 399
Special I/O Unit Area 2
IR 400 to IR 459
Work Area
IR 460 to IR 511
I/O Words
If a Unit brings inputs into the PC, the bit assigned to it is an input bit; if the Unit
sends an output from the PC, the bit is an output bit. To turn ON an output, the
output bit assigned to it must be turned ON. When an input turns ON, the input bit
assigned to it also turns ON. These facts can be used in the program to access
input status and control output status through I/O bits.
sends an output from the PC, the bit is an output bit. To turn ON an output, the
output bit assigned to it must be turned ON. When an input turns ON, the input bit
assigned to it also turns ON. These facts can be used in the program to access
input status and control output status through I/O bits.
Input Bit Usage
Input bits can be used to directly input external signals to the PC and can be used
in any order in programming. Each input bit can also be used in as many instruc-
tions as required to achieve effective and proper control. They cannot be used in
in any order in programming. Each input bit can also be used in as many instruc-
tions as required to achieve effective and proper control. They cannot be used in
IR (Internal Relay) Area
Section 3-3