DL06 Micro PLC User Manual, 3rd Edition, Rev. E
Chapter 1: Getting Started
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Step 6: Review the Programming Concepts
The DL06 PLC instruction set provides for three main approaches to solving the application
program, depicted in the figure below.
• RLL diagram-style programming is the best tool for solving boolean logic and general CPU register/
accumulator manipulation. It includes dozens of instructions, which will also be needed to augment
drums and stages.
• The Timer/Event Drum Sequencer features up to 16 steps and offers both time and/or event-based
step transitions. The DRUM instruction is best for a repetitive process based on a single series of
steps.
• Stage programming (also called RLL
plus
) is based on state-transition diagrams. Stages divide the
ladder program into sections which correspond to the states in a flow chart you draw for your process.
After reviewing the programming concepts above, you’ll be equipped with a variety of tools to
write your application program.
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TMR
T1
K30
CNT
CT3
K10
Standard RLL Programming
(see Chapter 5)
X0
LDD
V1076
CMPD
K309482
SP62
OUT
Y0
Timer/Event Drum Sequencer
(see Chapter 6)
Push–
DOWN
Push–UP
UP
DOWN
LOWER
RAISE
LIGHT
Stage Programming
(see Chapter 7)
Step 8: Understand the Maintenance and
Troubleshooting Procedures
Sometimes equipment failures occur when we
least expect it. Switches fail, loads short and need
to be replaced, etc. In most cases, the majority
of the troubleshooting and maintenance time is
spent trying to locate the problem. The DL06
Micro PLC has many built-in features, such as
error codes, that can help you quickly identify
problems.
Step 7: Choose the Instructions
Once you have installed the Micro PLC and
understand the main programming concepts, you
can begin writing your application program. At
that time you will begin to use one of the most
powerful instruction sets available in a small PLC.
