Allen-Bradley SLC 500

QUICKDESIGNER Siemens •
••
• 227
DBaaa:DWbbb[.cc]
DB is the static designation for Data Block
aaa is data block number
DW is the static designation for Data Word
bbb is the data word address
.cc bit designation for data registers
DXaaa:DWbbb[.cc]
DX is the static designation for Extended Data Block
aaa is data block number
DW is the static designation for Data Word
bbb is the data word address
.cc bit designation for data registers
Examples:
DB3:DW0 Data Block 3: Data Word 0
DB255:DW255 Data Block 255: Data Word 255
DX3:DW0 Extended Data Block 3: Data Word 0
DX255:DW255 Extended Data Block 255: Data Word 255
DB10:DW100.15Data Block 10: Data Word 100, Bit 15
SIMATIC 3964R Tag Variable Table
Tag Name Block
Address
Range
Word
Address
Range
Bit
Range
Suprt
Write
Value
Range
Example Notes
DB#:DW# 003 - 255
(1)
000 - 255
(1)
00 - 15
optional
YES -32768
to 32767
DB012:DW010
DB10:DW100.15
Word format (16 bits).
Bit writes are RMW
DX#:DW# 003 - 255
(1)
000 - 255
(1)
00 - 15
optional
YES -32768
to 32767
DX012:DW100
DX10:DW100.15
Word format (16 bits).
Bit writes are RMW
DB#:DD#
000 - 255
(1)
YES
-99999999-
99999999
double
DB#:DF#
000 - 255
(1)
YES
-99999999-
99999999
float
DX#:DD#
000 - 255
(1)
YES
-99999999-
99999999
double
DX#:DF#
000 - 255
(1)
YES
-99999999-
99999999
float
DB#:DW#
000 - 255
(1)
YES
ASCII string
(1) The maximum address is determined by the processor type and memory configuration.
(2) Both the address and data block range.