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CHAPTER9 DEVICES
9
9.1 Device 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) ( Section 9.2)
*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
Section
9.11.1
SFC transition device 512 TR0 to 511 Decimal
Section
9.11.2
-
Network No. specification
device
255 J1 to 255 Hexadecimal
Section
9.11.3
I/O No. specification device - U0 to FF Hexadecimal
Section
9.11.4
Macro instruction
argument device
-
VD0 to
Hexadecimal
Section
9.11.5
Constant -
Decimal constant K-2147483648 to 2147483647
Section
9.12.1
Hexadecimal constant H0 to FFFFFFFF
Section
9.12.2
Real number constant
Single-precision floating-point data:
E 1.17549435 38 to E 3.40282347+38
Section
9.12.3
Double-precision floating-point data:
E 2.2250738585072014 308 to
E 1.7976931348623157+308
Section
9.12.3
Character string constant "ABC", "123"
Section
9.12.4
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