Allen-Bradley SLC 500 Manual page 196

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 Word
Address Address
Range Range
DB#:DW# 003 - 255 000 - 255
(1)
DX#:DW# 003 - 255 000 - 255
(1)
DB#:DD# 000 - 255
DB#:DF# 000 - 255
DX#:DD# 000 - 255
000 - 255
DX#:DF#
DB#:DW# 000 - 255
(1) The maximum address is determined by the processor type and memory configuration.
(2) Both the address and data block range.
QUICKDESIGNER
Bit Suprt Value
Range Write Range
(1)
00 - 15 YES -32768
optional to 32767
(1)
00 - 15 YES -32768
optional to 32767
(1)
YES -99999999-
99999999
(1)
YES -99999999-
99999999
(1)
YES -99999999-
99999999
(1)
YES
-99999999-
99999999
(1)
YES ASCII
Example Notes
DB012:DW010 Word format (16 bits).
DB10:DW100.15 Bit writes are RMW
DX012:DW100 Word format (16 bits).
DX10:DW100.15 Bit writes are RMW
double
float
double
float
string
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