Automationdirect.com DL06 - Page 116

DL06 Micro PLC User Manual, 3rd Edition, Rev. E
3-25
Chapter 3: CPU Specifications and Operation
1
2
3
4
5
6
7
8
9
10
11
12
13
14
A
B
C
D
Memory Map
With any PLC system, you generally have many different types of information to process. This
includes input device status, output device status, various timing elements, parts counts, etc. It
is important to understand how the system represents and stores the various types of data. For
example, you need to know how the system identifies input points, output points, data words,
etc. The following paragraphs discuss the various memory types used in DL06 Micro PLCs. A
memory map overview for the CPU follows the memory descriptions.
.
V-memory Locations for Discrete Memory Areas
The discrete memory area is for inputs, outputs, control relays, special relays, stages, timer status
bits and counter status bits. However, you can also access the bit data types as a V-memory
word. Each V-memory location contains 16 consecutive discrete locations. For example, the
following diagram shows how the X input points are mapped into V-memory locations.
These discrete memory areas and their corresponding V-memory ranges are listed in the
memory area table for DL06 Micro PLCs on the following pages.
X0 X1 X2 X3 X4 X5 X6 X7
X10 X11
LOGI
C
Koyo
0
6
C0 C4C2X1 X3 X4 X6 X11X13 X14X16 X21X23 N.C.
C1 C3X2 X5 X7 X10X12 X15X17 X20X22X0
N.C.
AC
(
N
)
24V
0V
N.C.
C1 C3Y0 Y15Y12Y10Y17Y7Y5Y2
C0 C2 Y16Y14Y13Y11Y6Y4Y3Y1
LG
G
AC
(
L
)
D0-06DR
2.0AOUTPUT: 6-240V50 - 60Hz 2.0A, 6 - 27V
INPUT: 12 - 24V 3 - 15mA
Y
X
40VA50-60HzPWR: 100-240V
01 23456710 11 12 13 14 15 16 17 20 21 22
23
PORT1PORT2
TERM
RUN STOP
PWR
RUN
CPU
TX1
RX1
TX2
RX2
X0
Discrete – On or Off, 1 bit
0 11010 0000010010
Word Locations – 16 bits
X0X1X2X3X4X5X6X7
0123456789101112131415
V40400
Bit #
8 Discrete (X) Input Points
Octal Numbering System
All memory locations and resources
are numbered in Octal (base 8). For
example, the diagram shows how the octal
numbering system works for the discrete
input points. Notice the octal system does
not contain any numbers with the digits 8
or 9.
Discrete and Word Locations
As you examine the different memory
types, you’ll notice two types of memory
in the DL06, discrete and word memory.
Discrete memory is one bit that can be
either a 1 or a 0. Word memory is referred
to as V-memory (variable) and is a 16-bit
location normally used to manipulate data/
numbers, store data/numbers, etc.
Some information is automatically stored
in V-memory. For example, the timer
current values are stored in V-memory.