U
nd
er
st
an
di
ng
U
nd
er
st
an
di
ng
th
e
F
ea
tu
re
s
th
e
F
ea
tu
re
s
3--14
Installation and Specifications
Let’s examine the different address conventions for
Direct
LOGIC and
Allen-Bradley. For example, the
Direct
LOGIC address references are
octal
, and
the Allen-Bradley is
decimal
.
The
Direct
LOGIC DL05/DL105/DL205/D3--350/DL405 OP-panel address uses
V-memory registers which are 16-bit registers. The D3--330/340 CPUs use
reference assignments with 8-bit registers. This means that they require fourteen
8-bit registers for data handling. The Allen-Bradley memory is defined with a
reference
(Nx)
which represents the memory area, and
(:n)
which defines the word
within the memory area. Please refer to the appropriate CPU User manual for the
PLC product you are using.
V2000
V2001
V2002
V2003
V2005
V2006
V2004
V2007
V2010
V2011
V2012
V2014
V2015
V2013
R400/R401
R402/R403
R404/R405
R406/R407
R410/R411
R412/R413
R414/R415
R416/R417
R420/R421
R422/R423
R424/R425
R426/R427
R430/R431
R432/R433
Top line data 2 (for long BCD and floating point numbers)
Top line message selection
Second line message selection
Third line message selection
Bottom line message selection
Top line data
Second line data
Function
M+0
M+1
M+2
M+5
M+6
DL05/105/205/
D3--350/DL405
M+3
M+4
Example PLC Register Address
Register
Bottom line data 2 (for long BCD and floating point numbers)
Second line data 2 (for long BCD and floating point numbers)
Third line data
Third line data 2 (for long BCD and floating point numbers)
Control register
Bottom line data
Status register
M+7
M+8
M+9
M+12
M+13
M+10
M+11
D3--330/
D3--340
Generic
Direct
LOGIC PLCs
Allen-Bradley SLC 500
Not used (see Note)
Top line message selection
Second line message selection
Third line message selection
Bottom line message selection
Top line data
Second line data
Function
M+0
M+1
M+2
M+5
M+6
Register Address
M+3
M+4
Example PLC
Register
Third line data
Control register
Bottom line data
Status register
M+7
M+8
M+9
M+12
M+13
M+10
M+11
N7:0
N7:1
N7:2
N7:3
N7:4
N7:5
N7:6
N7:7
N7:8
N7:9
N7:10
N7:11
N7:12
N7:13
Not used (see Note)
Not used (see Note)
Not used (see Note)
NOTE:
While the OP--640 will display BCD Double and Floating Point numbers, it
does not support these functions when used with Allen--Bradley PLCs.
OP-Panel User
Memory