E
nte
rin
g
P
ro
gr
am
s
U
nd
er
sta
nd
in
g
th
e
F
ea
tu
re
s
Understanding the Features
3--5
Examine the address conventions for
Automationdirect
(
Direct
LOGIC) and
Allen-Bradley. For example, the
Direct
LOGIC address references are
octal
, and
the
Allen-Bradley’s
are
decimal
.
The
Direct
LOGIC
DL05/DL105/
DL205/D3--350/DL405 OP-panel address uses V-memory registers which are
16-bit registers. The DL305 family uses reference assignments with 8-bit registers.
This means that the DL305 will require eight 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.
V40601
V40603
V40602
M+0
M+1
M+2
M+3
V40600
Function
Example Address
Direct
LOGIC DL05/105/DL205/D3--350/DL405
Indicator lamps and pushbutton LEDs on/off control
Indicator lamps and pushbutton LEDs flash control
Pushbutton on/off status
Force pushbutton data and commands
M+0
M+1
M+2
M+3
Function
Example Address
Direct
LOGIC DL305 (D3--340)
Indicator lamps and pushbutton LEDs on/off control
Indicator lamps and pushbutton LEDs flash control
Pushbutton on/off status
Force pushbutton data and commands
R20/R21
R22/R23
R24/R25
R26/R27
M+0
M+1
M+2
M+3
Function
Example Address
Allen--Bradley SLC 5/03, 5/04, and Micrologix
Indicator lamps and pushbutton LEDs on/off control
Indicator lamps and pushbutton LEDs flash control
Pushbutton on/off status
Force pushbutton data and commands
N7:0
N7:1
N7:3
N7:2
PLC Register
Assignment
Examples
