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1-4 OMRON Product Terminology
OMRON products are divided into several functional groups that have generic
names. Appendix A Standard Models list products according to these groups.
The term Unit is used to refer to all of the OMRON PC products. Although a Unit
is any one of the building blocks that goes together to form a C200HX/HG/HE
PC, its meaning is generally, but not always, limited in context to refer to the Units
that are mounted to a Rack. Most, but not all, of these products have names that
end with the word Unit.
The largest group of OMRON products is the I/O Units. These include all of the
Rack-mounting Units that provide non-dedicated input or output points for gen-
eral use. I/O Units come with a variety of point connections and specifications.
High-density I/O Units are designed to provide high-density I/O capability and
include Group 2 High-density I/O Units and Special I/O High-density I/O Units.
Special I/O Units are dedicated Units that are designed to meet specific needs.
These include some of the High-density I/O Units, Position Control Units, High-
speed Counter Units, and Analog I/O Units.
Link Units are used to create Link Systems that link more than one PC or link a
single PC to remote I/O points. Link Units include Remote I/O Units, PC Link
Units, Host Link Units, SYSMAC NET Link Units, and SYSMAC LINK Units.
SYSMAC NET Link and SYSMAC LINK Units can be used with the CPU11-E
only.
Other product groups include Programming Devices, Peripheral Devices,
and DIN Rail Products.
1-5 Overview of PC Operation
The following are the basic steps involved in programming and operating a
C200HX/HG/HE PC. Assuming you have already purchased one or more of
these PCs, you must have a reasonable idea of the required information for
steps one and two, which are discussed briefly below. This manual is written to
explain steps three through six, eight, and nine. The relevant sections of this
manual that provide more information are listed with each of these steps.
1, 2, 3... 1. Determine what the controlled system must do, in what order, and at what
times.
2. Determine what Racks and what Units will be required. Refer to the
C200HX/HG/HE PC Installation Guide. If a Link System is required, refer to
the appropriate System Manual.
3. On paper, assign all input and output devices to I/O points on Units and de-
termine which I/O bits will be allocated to each. If the PC includes Special I/O
Units or Link Systems, refer to the individual Operation Manuals or System
Manuals for details on I/O bit allocation. (Section 3 Memory Areas)
4. Using relay ladder symbols, write a program that represents the sequence
of required operations and their inter-relationships. Be sure to also program
appropriate responses for all possible emergency situations. (Section 4
Writing and Inputting the Program, Section 5 Instruction Set, Section 6 Pro-
gram Execution Timing)
5. Input the program and all required operating parameters into the PC. (Sec-
tion 4-7 Inputting, Modifying, and Checking the Program.)
6. Debug the program, first to eliminate any syntax errors, and then to find
execution errors. (Section 4-7 Inputting, Modifying, and Checking the Pro-
gram, Section 7 Program Monitoring and Execution, and Section 9 Trouble-
shooting)
Overview of PC Operation Section 1-5