Omron SYSMAC C200HS User Manual

2
1-1 Overview
A PC (Programmable Controller) is basically a CPU (Central Processing Unit)
containing
a program and connected to input and output (I/O) devices. The pro -
gram controls the PC so that when an input signal from an input device turns ON,
the appropriate response is made. The response normally involves turning ON
an output signal to some sort of output device. The input devices could be photo -
electric
sensors, pushbuttons on control panels, limit switches, or any other de -
vice that can produce a signal that can be input into the PC. The output devices
could be solenoids, switches activating indicator lamps, relays turning on mo-
tors,
or any other devices that can be activated by signals output from the PC.
For example, a sensor detecting a passing product turns ON an input to the PC.
The PC responds by turning ON an output that activates a pusher that pushes
the product onto another conveyor for further processing. Another sensor , posi -
tioned
higher than the first, turns ON a dif ferent input to indicate that the product
is too tall. The PC responds by turning on another pusher positioned before the
pusher mentioned above to push the too-tall product into a rejection box.
Although
this example involves only two inputs and two outputs, it is typical of the
type of control operation that PCs can achieve. Actually even this example is
much
more complex than it may at first appear because of the timing that would
be required, i.e., “How does the PC know when to activate each pusher?” Much
more complicated operations, however , are also possible. The problem is how
to get the desired control signals from available inputs at appropriate times.
To
achieve proper control, the C200HS uses a form of PC logic called ladder-dia -
gram
programming. This manual is written to explain ladder-diagram program -
ming and to prepare the reader to program and operate the C200HS.
1-2 The Origins of PC Logic
PCs historically originate in relay-based control systems. And although the inte -
grated
circuits and internal logic of the PC have taken the place of the discrete
relays, timers, counters, and other such devices, actual PC operation proceeds
as if those discrete devices were still in place. PC control, however, also pro-
vides
computer capabilities and accuracy to achieve a great deal more flexibility
and reliability than is possible with relays.
The symbols and other control concepts used to describe PC operation also
come from relay-based control and form the basis of the ladder-diagram pro-
gramming
method. Most of the terms used to describe these symbols and con -
cepts, however, have come in from computer terminology.
Relay vs. PC Terminology The terminology used throughout this manual is somewhat dif ferent from relay
terminology, but the concepts are the same.
The following table shows the relationship between relay terms and the PC
terms used for OMRON PCs.
Relay term PC equivalent
contact input or condition
coil output or work bit
NO relay normally open condition
NC relay normally closed condition
Actually there is not a total equivalence between these terms. The term condi -
tion
is only used to describe ladder diagram programs in general and is specifi -
cally
equivalent to one of certain set of basic instructions. The terms input and
output are not used in programming per se, except in reference to I/O bits that
are assigned to input and output signals coming into and leaving the PC. Nor-
mally
open conditions and normally closed conditions are explained in 4-4 Basic
Ladder Diagrams.
The Origins of PC Logic Section 1-2

Omron SYSMAC C200HS Specifications

General

Model	C200HS
Manufacturer	Omron
Series	SYSMAC
Humidity	10 to 90% RH (non-condensing)
Programming Language	Ladder logic
Program Memory	RAM/EPROM/EEPROM
Communication Protocols	SYSMAC LINK, SYSMAC NET
Communication Ports	RS-232C, RS-422
Power Supply	100-240V AC, 24V DC
Operating Temperature	0 to 55°C
Vibration Resistance	10 to 57 Hz, 0.075mm amplitude

Summary

SECTION 1 Introduction

1-1 Overview

Provides a general introduction to Programmable Controllers (PCs), their operation, and programming concepts.

SECTION 2 Hardware Considerations

2-1 CPU Components

Details the main components of the C200HS CPU, including indicators, fuses, and connection ports.

SECTION 3 Memory Areas

3-2 Data Area Structure

SECTION 4 Writing and Inputting the Program

4-4 Basic Ladder Diagrams

Introduces fundamental concepts of ladder diagram programming, including rungs, conditions, and instructions.

4-7 Inputting, Modifying, and Checking the Program

Details the procedures for entering, editing, checking, and debugging programs using the Programming Console.

SECTION 5 Instruction Set

5-8 Ladder Diagram Instructions

Details fundamental instructions used in ladder diagrams like LOAD, AND, OR, and their variations.

SECTION 6 Program Execution Timing

6-1 Cycle Time

6-4 I/O Response Time

Details the time taken for the PC to respond to input signals and produce output signals.

SECTION 7 Program Monitoring and Execution

7-1 Monitoring Operation and Modifying Data

Covers procedures for observing and modifying PC data like bits, words, timers, and counters.

SECTION 8 Communications

8-2 Parameters for Host Link and RS-232C Communications

Details essential PC Setup parameters required for enabling Host Link and RS-232C communications.

SECTION 10 Troubleshooting

10-4 Error Messages

Lists common error messages, their probable causes, and possible corrections for diagnosing system problems.

10-5 Error Flags

SECTION 11 Host Link Commands

11-3 Host Link Commands

Details the various commands used for host computer communication with the C200HS PC.

Appendix B Programming Instructions

Appendix D Memory Areas

Appendix E PC Setup

Startup Processing (DM 6600 to DM 6614)

RS-232C Port Settings (DM 6645 to DM 6649)

Details the specific parameters for configuring the RS-232C port, essential for communication setup.