212
7.PLC storage area
7.1 Storage area types and properties
Region
Illustration
Bit
Byte
Word
Double
Word
Retain
Force
I
Discrete
input
and
image
register
Read /
write
Read /
write
Read /
write
Read /
write
NO
YES
Q
Discrete
output and
image
register
Read /
write
Read /
write
Read /
write
Read /
write
NO
YES
M
Internal
memory bit
Read /
write
Read /
write
Read /
write
Read /
write
YES
YES
SM
Special
memory bit
(
SM0 -
SM29
Read-only)
Read /
write
Read /
write
Read /
write
Read /
write
NO
NO
V
Variable
memory
Read /
write
Read /
write
Read /
write
Read /
write
YES
YES
T
Timer
current value
and timer bit
Read /
write
(
T
bit
)
NO
Read /
write
(
T
Current
value
)
NO
T
current
value
YES
T bit
NO
C
Counter
current value
and counter
bit
Read /
write
(
C
bit
)
NO
Read /
write
(
C
current
value
)
NO
C
current
value
YES
C bit
NO
HC
Current
value of high
speed
counter
NO
NO
NO
read-only NO
NO
AI
Analog input
NO
NO
Read-only NO
NO
YES
AQ
Analog
output
NO
NO
write only NO
NO
YES
AC
Accumulator
register
NO
Read /
write
Read /
write
Read /
write
NO
NO
L
Local
variable
memory
Read /
write
Read /
write
Read /
write
Read /
write
NO
NO
Summary of Contents for PR-12 Series
Page 26: ...19 1 xLogic CPU PR 12 Series CPU PR 14 and PR 18 series 1 PR 18 CPU 2 PR E extension...
Page 27: ...20 PR 24 series...
Page 47: ...40 5 3 Instruction tree...
Page 58: ...51 5 3 10 Instructions Instructions will be explained in detail in the instructions section...
Page 93: ...86 2 Enter the illegal real number Example...
Page 127: ...120 Example...
Page 139: ...132 Special memory bit SM1 0 Zero result SM1 1 overflow SM1 2 Negative result Example...
Page 149: ...142 Example...
Page 152: ...145 Example ATCH instruction only needs to be connected once...
Page 154: ...147 Example...
Page 175: ...168...
Page 217: ...210 Example Four arithmetic operation Main program...
Page 218: ...211 Subroutine...
Page 252: ...245 10 8 Example of serial port free port communication Program 1...
Page 254: ...247 10 9 Example of CAN free port...
Page 258: ...251 Conversion of Process quantity and set value unit...