DL06 Micro PLC User Manual, 3rd Edition, Rev. E
3-2
Chapter 3: CPU Specifications and Operation
1
2
3
4
5
6
7
8
9
10
11
12
13
14
A
B
C
D
Overview
The Central Processing Unit (CPU) is the heart of the Micro PLC. Almost all PLC operations
are controlled by the CPU, so it is important that it is set up correctly. This chapter provides
the information needed to understand:
• Steps required to set up the CPU
• Operation of ladder programs
• Organization of Variable Memory
NOTE: The High-Speed I/O function (HSIO) consists of dedicated but configurable hardware in the
DL06. It is not considered part of the CPU because it does not execute the ladder program. For more
on HSIO operation, see Appendix E.
DL06 CPU Features
The DL06 Micro PLC has 14.8K words of memory comprised of 7.6K of ladder memory and
7.6K words of V-memory (data registers). Program storage is in the FLASH memory which
is a part of the CPU board in the PLC. In addition, there is RAM with the CPU which will
store system parameters, V-memory, and other data not in the application program. The RAM
is backed up by a super-capacitor, storing the data for several hours in the event of a power
outage. The capacitor automatically charges during powered operation of the PLC.
The DL06 supports fixed I/O which includes twenty discrete input points and sixteen output
points.
Over 220 different instructions are available for program development as well as extensive
internal diagnostics that can be monitored from the application program or from an operator
interface. Chapters 5, 6, and 7 provide detailed descriptions of the instructions.
The DL06 provides two built-in communication ports, so you can easily connect a handheld
programmer, operator interface, or a personal computer without needing any additional
hardware.
LCD monitor
4 Optional
card slots
2 comm. ports
Power
Input
16 Discrete Outputs
To programming device
or Operator interface
20 discrete Inputs
Isolation
boundary
Output circuit
Input circuit
Power
Supply
CPU