9
-
4
CHAPTER9 DEVICES
9
9.1 D
evice
List
*1: For the timer, retentive timer, and counter, a bit device is used for contacts and coils, and a word device is used for a present value.
*2: The number of points that can be actually used varies depending on the intelligent function module.
For the number of buffer memory points, refer to the manual for the intelligent function module used.
*3: Can be changed in the PLC parameter dialog box of GX Developer.
(Except the input, output, step relay, link special relay, and link special register) (
*4: Can be only used in multiple CPU systems.
Table9.2 Device list (continued)
Classification
Type
Device name
Default
Parameter-set
range
Reference
Points
Range
Other
Bit device
SFC block device
320
BL0 to 319
Decimal
Cannot be changed
SFC transition device
512
TR0 to 511
Decimal
-
Network No. specification
device
255
J1 to 255
Hexadecimal
I/O No. specification device
-
U0 to FF
Hexadecimal
Macro instruction
argument device
-
VD0 to
Hexadecimal
Constant
-
Decimal constant
K-2147483648 to 2147483647
Hexadecimal constant
H0 to FFFFFFFF
Real number constant
Single-precision floating-point data:
E
1.17549435
38 to E
3.438
Double-precision floating-point data:
E
2.2250738585072014
308 to
E
1.797693134308
Character string constant
"ABC", "123"
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