Omron C500-ASC04 Operation Manual

C500-ASC04 ASCII Unit

Operation Manual

Revised February 2001

No. 6182

OMRON Corporation

Read and Understand this Manual

Please read and understand this manual before using the product. Please consult your OMRON
representative if you have any questions or comments.

Warranty and Limitations of Liability

WARRANTY

OMRON's exclusive warranty is that the products are free from defects in materials and workmanship for a
period of one year (or other period if specified) from date of sale by OMRON.

OMRON MAKES NO WARRANTY OR REPRESENTATION, EXPRESS OR IMPLIED, REGARDING NON­INFRINGEMENT, MERCHANTABILITY, OR FITNESS FOR PARTICULAR PURPOSE OF THE
PRODUCTS. ANY BUYER OR USER ACKNOWLEDGES THAT THE BUYER OR USER ALONE HAS
DETERMINED THAT THE PRODUCTS WILL SUITABLY MEET THE REQUIREMENTS OF THEIR
INTENDED USE. OMRON DISCLAIMS ALL OTHER WARRANTIES, EXPRESS OR IMPLIED.

LIMITATIONS OF LIABILITY

OMRON SHALL NOT BE RESPONSIBLE FOR SPECIAL, INDIRECT, OR CONSEQUENTIAL DAMAGES,
LOSS OF PROFITS OR COMMERCIAL LOSS IN ANY WAY CONNECTED WITH THE PRODUCTS,
WHETHER SUCH CLAIM IS BASED ON CONTRACT, WARRANTY, NEGLIGENCE, OR STRICT
LIABILITY.

In no event shall the responsibility of OMRON for any act exceed the individual price of the product on which
liability is asserted.

IN NO EVENT SHALL OMRON BE RESPONSIBLE FOR WARRANTY, REPAIR, OR OTHER CLAIMS
REGARDING THE PRODUCTS UNLESS OMRON'S ANALYSIS CONFIRMS THAT THE PRODUCTS
WERE PROPERLY HANDLED, STORED, INSTALLED, AND MAINTAINED AND NOT SUBJECT TO
CONTAMINATION, ABUSE, MISUSE, OR INAPPROPRIATE MODIFICATION OR REPAIR.

1

No. 6182

Application Considerations

SUITABILITY FOR USE

OMRON shall not be responsible for conformity with any standards, codes, or regulations that apply to the
combination of products in the customer's application or use of the products.

At the customer's request, OMRON will provide applicable third party certification documents identifying
ratings and limitations of use that apply to the products. This information by itself is not sufficient for a
complete determination of the suitability of the products in combination with the end product, machine,
system, or other application or use.

The following are some examples of applications for which particular attention must be given. This is not
intended to be an exhaustive list of all possible uses of the products, nor is it intended to imply that the uses
listed may be suitable for the products:

• Outdoor use, uses involving potential chemical contamination or electrical interference, or conditions or
uses not described in this manual.

• Nuclear energy control systems, combustion systems, railroad systems, aviation systems, medical
equipment, amusement machines, vehicles, safety equipment, and installations subject to separate
industry or government regulations.

• Systems, machines, and equipment that could present a risk to life or property.

Please know and observe all prohibitions of use applicable to the products.

NEVER USE THE PRODUCTS FOR AN APPLICATION INVOLVING SERIOUS RISK TO LIFE OR
PROPERTY WITHOUT ENSURING THAT THE SYSTEM AS A WHOLE HAS BEEN DESIGNED TO
ADDRESS THE RISKS, AND THAT THE OMRON PRODUCTS ARE PROPERLY RATED AND INSTALLED
FOR THE INTENDED USE WITHIN THE OVERALL EQUIPMENT OR SYSTEM.

PROGRAMMABLE PRODUCTS

OMRON shall not be responsible for the user's programming of a programmable product, or any
consequence thereof.

2

No. 6182

Disclaimers

CHANGE IN SPECIFICATIONS

Product specifications and accessories may be changed at any time based on improvements and other
reasons.

It is our practice to change model numbers when published ratings or features are changed, or when
significant construction changes are made. However, some specifications of the products may be changed
without any notice. When in doubt, special model numbers may be assigned to fix or establish key
specifications for your application on your request. Please consult with your OMRON representative at any
time to confirm actual specifications of purchased products.

DIMENSIONS AND WEIGHTS

Dimensions and weights are nominal and are not to be used for manufacturing purposes, even when
tolerances are shown.

PERFORMANCE DATA

Performance data given in this manual is provided as a guide for the user in determining suitability and does
not constitute a warranty. It may represent the result of OMRON's test conditions, and the users must
correlate it to actual application requirements. Actual performance is subject to the OMRON Warranty and
Limitations of Liability.

ERRORS AND OMISSIONS

The information in this manual has been carefully checked and is believed to be accurate; however, no
responsibility is assumed for clerical, typographical, or proofreading errors, or omissions.

3

iv

Notice:

OMRON products are manufactured for use according to proper procedures by a qualified operator
and only for the purposes described in this manual.

The following conventions are used to indicate and classify warnings in this manual. Always heed the
information provided with them.

DANGER Indicates information that, if not heeded, is likely to result in loss of life or serious injury.

!

WARNING Indicates

!

Caution Indicates

!

age to the product, or faulty operation.

information that, if not heeded, could possibly result in loss of life or serious injury

information that, if not heeded, could result in relatively serious or

OMRON Product References

All OMRON products are capitalized in this manual. The word “Unit” is also capitalized when it refers
to an OMRON product, regardless of whether or not it appears in the proper name of the product.

The abbreviation “Ch,” which appears in some displays and on some OMRON products, often means
“word” and is abbreviated “Wd” in documentation in this sense.

The abbreviation “PC” means Programmable Controller and is not used as an abbreviation for any­thing else.

Visual Aids

The following headings appear in the left column of the manual to help you locate different types of
information.

Note Indicates

of the product.

information of particular interest for ef

minor injury

ficient and convenient operation

, dam

.

-

 OMRON, 1991

All rights reserved. No part of this publication may be reproduced, stored in a retrieval system, or transmitted, in any
form, or by any means, mechanical, electronic, photocopying, recording, or otherwise, without the prior written permis­sion of OMRON.

No patent liability is assumed with respect to the use of the information contained herein. Moreover, because OMRON is
constantly striving to improve its high-quality products, the information contained in this manual is subject to change
without notice. Every precaution has been taken in the preparation of this manual. Nevertheless, OMRON assumes no
responsibility for errors or omissions. Neither is any liability assumed for damages resulting from the use of the informa­tion contained in this publication.

1, 2, 3...

1. Indicates lists of one sort or another, such as procedures, checklists, etc.

v

vi

TABLE OF CONTENTS

PRECAUTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

1 Intended Audience . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2 General Precautions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

3 Safety Precautions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

4 Operating Environment Precautions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

5 Application Precautions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

SECTION 1

Hardware . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

1-1 Front Panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

1-2 Back Panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

1-3 ASCII Unit Internal Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

1-4 System Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

1-5 Mounting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

SECTION 2

Data Allocations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2-1 Bits and Words . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2-2 Data Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

SECTION 3

Programming and Communications . . . . . . . . . . . . . . . .

3-1 Programs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

3-2 Program Transfer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

3-3 Running the BASIC Program . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

3-4 Assembly Routines . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

SECTION 4

BASIC Programming . . . . . . . . . . . . . . . . . . . . . . . . . . . .

4-1 Program Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

4-2 Commands, Statements, and Functions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

SECTION 5

Assembly Programming . . . . . . . . . . . . . . . . . . . . . . . . . .

5-1 Assembly Language Programming . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

5-2 Terminology and Formatting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

5-3 Monitor Mode Commands . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

SECTION 6

Program Examples . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

6-1 Timing Considerations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

6-2 Programs in Two-word Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

6-3 Programs in Four-word Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

6-4 Assembly Language Examples . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Appendices

A Standard Models . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

B Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

C PC Statements and Refresh Timing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

D Formatting and Data Conversion . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

E Memory Map . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

F Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

G BASIC Commands, Statements, and Functions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Glossary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Index . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Revision History . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

vii

About this Manual:

This

manual describes the installation and operation of the C500-ASC04 ASCII Unit. The ASCII Unit can
be mounted to a C500, C1000H, C2000H, or CV-series PC to control ASCII data I/O through a BASIC
program
and I/O WRITE instructions (READ(88) and WRIT(87) or READ(190) and WRIT(191)).

It has been assumed in the writing of this manual that the reader is already familiar with the hardware,
programming,
should refer to the appropriate OMRON PC manuals for assistance.

stored in the ASCII Unit. The C500-ASC04

and terminology of OMRON PC’

must be used with a PC that supports the I/O READ

s. If a review of this information is necessary

, the

reader

manual contains the following sections. Please read this

This
stand the information provide before attempting to install and operation the ASCII Unit.

Section 7
Section

ASCII Unit and the PC exchange data.

Section

load, save, and run an BASIC program for the ASCII Unit.

Section

commands
ers already proficient in BASIC pay careful attention to this section.

Section 11

Unit’s

Section 12

ented
the PC work together in various applications. Also in this section are several examples used to illustrate
the execution sequence of the hardware during execution of the ASCII Unit and PC programs.

Detailed technical information not immediately necessary for the understanding of a particular section
has
of the appendices, see the table of contents.

Note In this manual, ladder diagram instructions are given by mnemonics with the function codes in

explains the external hardware of the ASCII Unit and how it connects to a PC system.

8

explains the format of the PC memory area accessed by the ASCII Unit. This area is where the

9

explains how the ASCII Unit program and the PC program communicate as well as how to write,

10

presents the BASIC programming language used by the ASCII Unit. Since many of the BASIC
are nonstandard and peculiar to an ASCII Unit-PC system, it

explains the

BASIC program. It also explains in detail how to write, edit, and run an assembly language program.

presents programming examples that are meant to bring together all of the concepts pres-

in this manual. Most of the programs deal with data transfer and illustrate

been put into one of the seven appendices and should be used for reference

parentheses
code is for CV-series PCs. For example, in MOV(21/030) (the MOVE instruction), the function
code for C-series PCs is 21; for CV-series PCs, 030.

assembly language programming environment and how it relates to the ASCII

following them. The first function code is for C-series PCs and the second function

manual completely and be sure you under

is recommended that even read

how the ASCII Unit and

when needed. For a list

-

-

!

WARNING Failure to read and understand the information provided in this manual may result in

personal injury or death, damage to the product, or product failure. Please read each
section
and related sections before attempting any of the procedures or operations given.

in its entirety and be sure you understand the information provided

in the section

ix

PRECAUTIONS

This section provides general precautions for using the Programmable Controller (PC) and related devices.

The

information contained in this section is important for the safe and r

this section and understand the information contained before attempting to set up or operate a PC system.

1 Intended Audience . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2 General Precautions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

3 Safety Precautions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

4 Operating Environment Precautions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

5 Application Precautions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

eliable application of the PC. Y

ou must read

xi

1 Intended Audience

This

manual is intended for the following personnel, who must also have knowl

edge of electrical systems (an electrical engineer or the equivalent).

• Personnel in charge of installing FA systems.

• Personnel in charge of designing FA systems.

• Personnel in charge of managing FA systems and facilities.

2 General Precautions

The

user must operate the product according to the performance specifications

described in the operation manuals.
Before

using the product under conditions which are
or applying the product to nuclear control systems, railroad systems, aviation
systems, vehicles, combustion systems, medical equipment, amusement
machines,
may
your OMRON representative.

Make sure that the ratings and performance characteristics of the product are
sufficient
systems, machines, and equipment with double safety mechanisms.

This
Be

sure

manual close at hand for reference during operation.

safety equipment, and other systems, machines,

have a serious influence on lives and property if

for

manual provides

to read this manual before attempting to use the software and keep this

4Operating Environment Precautions

-

not described in the manual

and equipment that

used improperly

the systems, machines, and equipment, and be sure to provide the

information for programming and operating OMRON PCs.

, consult

WARNING It is extreme important that a PC and all PC Units be used for the specified

!

purpose
directly or indirectly affect human life. You must consult with your OMRON
representative before applying a PC System to the abovementioned
applications.

and under the specified conditions, especially in applications that can

3 Safety Precautions

WARNING Do

!

WARNING Do not touch any of the terminals or terminal blocks while the power is being

!

WARNING Do

!

not attempt to take any Unit apart while the power is being supplied. Doing

may result in electric shock.

supplied. Doing so may result in electric shock.

not

attempt to disassemble, repair

may result in malfunction, fire, or electric shock.

, or modify any Units. Any attempt to do so

4 Operating Environment Precautions

Caution Do not operate the control system in the following locations:

!

so

xii

• Locations subject to direct sunlight.

• Locations subject to temperatures or humidity outside the range specified in

the specifications.

• Locations

ture.

subject to condensation as the result of severe changes in tempera

-

• Locations subject to corrosive or flammable gases.

• Locations subject to dust (especially iron dust) or salts.

• Locations subject to exposure to water, oil, or chemicals.

• Locations subject to shock or vibration.

5Application Precautions

Caution Take

!

Caution The

!

appropriate and suf

following locations:

• Locations subject to static electricity or other forms of noise.

• Locations subject to strong electromagnetic fields.

• Locations subject to possible exposure to radioactivity.

• Locations close to power supplies.

operating environment of the PC system can

gevity

and reliability of the system. Improper operating environments can lead to
malfunction,
sure

that the operating environment is within the specified conditions at installa

tion and remains within the specified conditions during the life of the system.

failure,

5 Application Precautions

Observe the following precautions when using the PC system.

WARNING Always heed these precautions. Failure to abide by the following precautions

!

could lead to serious or possibly fatal injury.

• Always

necting to a ground of 100 Ω or less may result in electric shock.

• Always

lowing.
shock.

ground the system to 100 Ω or less when installing the Units. Not con

turn OFF the power supply to the PC before attempting any of the fol

Not turning OFF the power supply may result in malfunction or

• Mounting
ply Units, or any other Units.

• Assembling the Units.

• Setting DIP switches or rotary switches.

• Connecting cables or wiring the system.

• Connecting or disconnecting the connectors.

or dismounting I/O Units, CPU Units, Memory Units Power Sup

ficient countermeasures when installing systems in the

have a large ef

and other unforeseeable problems with the PC system. Be

fect on the lon

electric

-

-

-

-

-

Caution Failure

!

PC
cautions.

• Fail-safe measures must be taken by the customer to ensure safety in the

• Always use the power supply voltages specified in this manual. An incorrect

• Take

• Install

to abide by the following precautions could lead to faulty operation of the

or the system, or

of incorrect, missing, or abnormal signals caused by broken signal lines,

event
momentary power interruptions, or other causes.

voltage may result in malfunction or burning.

appropriate measures to ensure that the specified power with the rated
voltage
power

ing
result in burning.

and frequency is supplied. Be particularly careful in places where the

supply is unstable. An incorrect power supply may result in malfunction.

external breakers and take other safety measures against short-circuit

in external wiring. Insuf

could damage the PC or PC Units. Always heed these pre

ficient safety measures against short-circuiting may

-

-

xiii

• Do not apply voltages to the Input Units in excess of the rated input voltage.
Excess voltages may result in burning.

• Do not apply voltages or connect loads to the Output Units in excess of the
maximum switching capacity. Excess voltage or loads may result in burning.

• Disconnect
tests.

• Be sure that all the mounting screws, terminal screws, and cable connector
screws
ing torque may result in malfunction.

• Leave
sult in malfunction if foreign matter enters the Unit.

• Remove
tion. Leaving the label attached may result in malfunction.

• Double-check
ply. Incorrect wiring may result in burning.

• Wire correctly. Incorrect wiring may result in burning.

• Mount Units only after checking terminal blocks and connectors completely.

• Be

sure that the terminal blocks, Memory
items with locking devices are properly locked into place. Improper locking
may result in malfunction.

• Check
Unit. Not checking the program may result in an unexpected operation.

• Confirm
the following. Not doing so may result in an unexpected operation.

• Changing the operating mode of the PC.

• Force-setting/force-resetting any bit in memory.

• Changing the present value of any word or any set value in memory.

• Resume

the DM Area, HR Area, and other data required for resuming operation. Not
doing so may result in an unexpected operation.

• Do

not pull on the cables or bend the cables beyond their natural limit.

either of these may break the cables.

• Do

not place objects on top of the cables or other wiring lines. Doing so may

break the cables.

• Use

crimp terminals for wiring. Do not connect bare stranded wires directly to

terminals. Connection of bare stranded wires may result in burning.

• When
Not doing so may result in malfunction or burning.

• Before
to

discharge any

age.

the functional ground terminal when

Not disconnecting the functional ground terminal may result in burning.

are tightened to the torque specified

the label attached to

the label after the completion of wiring to ensure proper heat dissipa

all wiring and switch settings before turning ON the power sup

the user program for proper execution before actually running it on the

that no adverse ef

operation only after transferring to the new CPU Unit the contents of

replacing parts, be sure to confirm that the

touching a Unit, be sure to first touch a

static built-up. Not doing so may result in malfunction or dam

the Unit when wiring. Removing the label may re

fect will occur in the system before attempting any of

performing withstand voltage

in this manual. Incorrect tighten

Units, expansion cables, and other

Doing

rating of a new part is correct.

grounded metallic object in order

5Application Precautions

-

-

-

-

-

xiv

SECTION 1

Hardware

This

section describes the external hardware of the ASCII Unit. The front and back panels of the ASCII Unit contain switches,
buttons,
Unit’s internal configuration as well as a typical system configuration are also illustrated.

connectors, and indicators which

1-1 Front Panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

1-2

Back Panel

1-3 ASCII Unit Internal Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

1-4 System Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

1-5 Mounting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

enable the user to setup, control, and monitor ASCII Unit operations. The ASCII

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

1

Front Panel Section 1-1

1-1 Front Panel

On the front panel of the ASCII Unit, there are six indicator lights, the reset
switch,

the ST
partment.
for setting various control parameters.

Ports The front panel of the ASCII Unit contains two RS-232C ports. These ports

are used for connecting peripheral I/O devices to the ASCII Unit. Both ports
can be used for communication devices such as printers, terminals, and mo­dems. Only port 1 can be used for uploading or downloading a BASIC pro­gram. The standard configuration is a personal computer connected to port 1
and a printer or other I/O device connected to port 2.

Switches The START/STOP switch is a toggle switch and is used for initiating and halt-

ing execution of the ASCII Unit program.

RESET

The

Battery Compartment The battery compartment holds the C500-BAT08 Battery.
Front Panel

ART/ST

OP switch, two RS-232C

connectors, and a battery com

In addition, behind the LED Display Panel, is an 8-pin DIP switch used

switch is used for resetting the ASCII Unit.

-

LED display

Indicates the operating
status of the ASCII Unit.

RESET switch

Resets the ASCII Unit

START/STOP switch

Starts/stops BASIC
program execution.

Indicator LEDs

Name Indication Function

RUN Lit (green) Lit when the ASCII Unit is operating normally. Unlit if an error

T/R for ports 1 and 2 Blinking (green) Blinks during data transmission (port 1 and port 2).
ERROR 1 (port 1)

ERROR 2 (port 2)

BASIC

BAT ERR Blinking (red) Blinks when the battery voltage has fallen below the rated level or

4CH Lit (green) Lit when the ASCII Unit is set for 4-word mode. Unlit when the

Lit (red) Lit if a reception buffer overflows or an error such as parity error

Lit (green) Lit while the BASIC program is running.
Blinking (green) Blinks when the BASIC program stops, or when the ASCII Unit is

Unlit (green) Unlit when in monitor mode.

The following table describes the ASCII Unit’s indicators.

DIP switch

DIP switch is visible when the
indicator panel is removed.

RS-232C connector port 1

Connects peripheral devices. Is generally
used to input the BASIC program but can be
used for other peripheral devices as well.

RS-232C connector port 2

Connects peripheral devices. Cannot be
used to input a BASIC program. Is generally
used for a printer or other RS-232C devices.

Battery compartment

Holds the C500-BAT08 Battery.

occurs.

occurs (see note), or while the ASCII Unit is waiting for specific
transmission conditions to be satisfied.

waiting for input while the BASIC program is running.

if the battery is not inserted correctly.

ASCII Unit is set for 2-word mode.

2

Front Panel Section 1-1

Front Panel DIP Switch

Note When

a reception buf

is

lit and will not be turned of
overflow
tor, execute the CLOSE instruction or stop the program.

In order to access the front panel DIP switch, the indicator cover must be re­moved
DIP
before
when mounting the ASCII Unit.

is corrected, because the error log must be kept. To turn of

with a standard screwdriver as shown in the illustration below

switch, the power

the ASCII Unit is mounted to the PC. Make sure the power to the PC is of

fer overflows or transmission error occurs, the red indicator

f even if the transmission error

to the ASCII Unit must be OFF

Standard
Screwdriver

. The DIP switch must be set

or reception buf

fer

f the indica

. T

o set the

-

f

3

Front Panel Section 1-1

DIP Switch Settings

OFFON: 0

: 1

12345678

Start mode

Pin No. 1 Function

Setting

Automatic program transfer from EEPROM to RAM

Pin No. Function
Setting

0

1

Manual start mode
In this mode, the BASIC program is

not started upon power application.

0

To start the program, either press
the START/STOP switch or issue a
start command from the personal
computer connected to port 1.

Automatic start mode
In this mode, the BASIC program

1

is started automatically on power
application.

2

Set this pin to “0” if only the
RAM is to be used.

Set this pin to “1” to automati­cally transfer the program
from the EEPROM to RAM on
power application or reset.

Screen size

Pin No. Screen Size

Setting

Pin No. Function5

Setting

678
000
1

00
1
11
00
0

1

11

0

Specifies 2 or 4 word setting for
the Data Section.

Two word setting. Choose this setting

0

to use WRIT(87/191)/READ(88/190)
Four word setting. This setting is used

when the ASCII Unit is mounted to a

1

Slave Rack or when the PC does not
support WRIT(87/191)/READ(88/190).

40 columns x 7 lines
40 columns x 8 lines
40 columns x 15 lines

00

40 columns x 16 lines

0

80 columns x 15 lines

1

80 columns x 16 lines

1

80 columns x 24 lines
80 columns x 25 lines

111

Program No.

These pins select which program will be executed on power
application or reset. The program number can be changed
later with the PGEN command.

Pin No. Function34
Setting

00
10
01
11

No. 1

No. 2
No. 3

4

Back Panel Section 1-2

1-2 Back Panel

The back panel of the ASCII Unit houses the PC connector and an 8-pin DIP
switch used for setting the communication parameters.

Back Panel

Mounting Screw

For mounting the ASCII Unit
to the PC Rack

Connector

Connects the ASCII Unit
to the PC

DIP Switch

For setting the communi­cation parameters

Mounting Screw

For mounting the ASCII Unit
to the PC Rack

Back Panel DIP Switch

Baud rate selection for port 1

Pin No.

Setting

123
000
1

1
0

• Pins 1, 2, and 3 are used for setting the baud rate of port 1.

• Pins 4, 5, and 6 are used for setting the baud rate of port 2.

• Pins

7 and 8 are not used but must be set to OFF

. If they are left ON, the Hard

ware Test program will be executed and all RAM data will be lost.

The DIP switch settings are described in more detail in the following diagram.

OFFON: 0

00
1

00

11

0
1

00

1

0
11

111

: 1

Baud Rate

300 bps
600 bps
1,200 bps
2,400 bps
4,800 bps

9,600 bps

12345678

Not used (Always set these pins to OFF.)

Baud rate selection for port 2

Pin No.

Setting

456
000
1

00
1

00

11

0
1

00

1

0

1

11

0

111

Baud Rate

300 bps
600 bps
1,200 bps
2,400 bps
4,800 bps
9,600 bps

19,200 bps

-

5

ASCII Unit Internal Configuration Section 1-3

1-3 ASCII Unit Internal Configuration

The

Common Memory can be accessed using the ASCII Unit’
WRITE
READ(88/190)

statements. It can also be accessed using the PC’

instructions. I/O data can be accessed using the ASCII Unit’
GET, PC PUT, and ON PC statements. It can also be accessed using the
MOV(21/030) instruction.

The following figure illustrates these instructions and their relationship to the
Common Memory and the I/O data.

ASCII Unit

s PC READ or PC

s WRIT(87/191) and

s PC

PC

CPU

LED Indicators

DIP Switches

I/O Bus

Interface
Circuit

Common
Memory

Data

I/O

EEPROM

I/O

CPU

System
Memory

Work
Memory

BASIC
Program
Memory

BASIC Data
Memory

RS-232C
Interface

RS-232C
Interface

RS-232C

Port 1

Connectors

Port 2

RESET

START
/STOP

6

Mounting Section 1-5

1-4 System Configuration

The ASCII Unit can be mounted to any slot on the CPU Backplane. Before
mounting
er

supply to the PC is turned OFF during installation of the ASCII Unit. A personal
computer
and
connected
tion on peripheral interface connections and timing, refer to

C500/C1000H/C2000H CV SeriesC120

the ASCII Unit, the DIP switches must be set. Make sure that the
used for entering the BASIC program should be connected to Port

other peripheral I/O devices such as a printer or a display terminal can be

to Port 2 (refer to the following diagram). For more detailed informa

Appendix B

C500
Expansion
I/O Rack

pow

.

-

1

-

1-5 Mounting

Personal Computer

The ASCII Unit can be mounted to any I/O slot. The control panel must allow
enough space for the connectors, as shown in the figure below.

Bar-code Reader

Plasma Display

*1. Height

*2. Height of the ASCII Unit with an RS-232C con-

of the ASCII Unit including the base (100

mm)

nector attached (approximately 160 to 180 mm)

Printer

7

This section explains the words of the PC used to communicate with the ASCII Unit.

2-1

Bits and W

2-2 Data Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2-2-1 Two-word Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2-2-2 Four-Word Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

ords . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

SECTION 2

Data Allocations

9

Data Configuration Section 2-2

2-1 Bits and Words

The

PC’

s memory is divided up into many sections, each of which has its own

unique name and purpose. The ASCII Unit can access any of these memory

using

areas
detail
IR data area that are uniquely assigned to each ASCII Unit.

The PC’s memory is organized into units called
stored in word or multiple word units. Each word has a unique address in the
computer memory and can be accessed by specifying its address.

Each
stored
one (OFF or ON). Certain bits can be accessed individually and are used as
flags.
computer or to enable or disable certain operations. Bits can also be set or
cleared
the

CPU.

For

example, when the ASCII Unit program requests data to be sent from the PC
using
that

the ASCII Unit must wait while the PC prepares the data. When the PC has
collected
proceed to read the data.

the BASIC READ and WRITE statements (this is explained in more

in

Section

word contains 16 bits. A bit is the smallest piece of information that can be

or accessed by a computer

A

flag

by the programmer to communicate certain parameters or conditions to

the BASIC GET statement, the PC’

the data,

4 BASIC Programming

is turned ON and OFF by the hardware to indicate some state of the

it turns ON the W

). However

. A bit is always

s W

rite Flag, signaling the ASCII Unit that it may

, there

are words in the PC’

words

. Information is usually

in one of two states: zero or

rite Flag is turned OFF

, indicating

s

2-2 Data Configuration

Each

ASCII Unit is assigned a section of memory in the PC. The data has two

configurations,

pin 5 of the front panel

setting
Unit.

The

basic dif
in

two-word mode the WRIT(87/191)/READ(88/190) instructions are supported

for

data transfer while in four-word mode they are not supported. The structure

and application of the words in each of the two modes is explained next.

2-2-1 Two-word Configuration

WRIT(87/191)
WRIT(87/191) is the PC’
I/O READ instruction.

When

the PC uses
can be transferred at one time. In order to transfer multiple data words at the
same

time, however

or PC WRITE statements. In addition the A or S formats

Appendix D

The following PCs support WRIT(87/191)/READ(88/190):
C500: 3G2C3-CPU11-EV1
C120: 3G2C4-SC024-EV1
All C1000H, C2000H, CV-series PCs.

When WRIT(87/191)/READ(88/190) are not supported or not used, data is
transferred
used, only one word of data is transferred at a time.

To output (word n) data using the MOV(21/030), set bits 00, 01, 02 and 03 to
zero.

for more information on formats.

using the PC’

two-word

ference between the two-word

and READ(88/190) are supported in the two-word configuration.

and

four-word

DIP switch before power is applied to the ASCII

s I/O WRITE instruction and READ(88/190)

these instructions for data transfer

, the ASCII

Unit must be programmed to use the PC READ

s MOV(21/030) instruction. When

. The data configuration is selected by

and four-word configurations is that

, up to 255 words of data

must be used. Refer to

is the PC’

the MOV(21/030) is

s

Data Bit Definitions

10

The

following table identifies the individual bits in the two words allocated to the

ASCII

Unit. In the following Bit Definition table, entries in the

Bit

column enclosed

Data Configuration Section 2-2

in parentheses are reserved for use by WRIT(87/191)/READ(88/190) and are
not available for general programming application.

Word Bit Function Description

n (00) PC busy Reserved for WRIT(87/191)/READ(88/190)

(01) PC WRITE complete
(02) PC READ complete
03 Restart The ASCII Unit is activated when this bit goes OFF
04 to 07
08 to 15

n+1 (00) ASCII busy Reserved for WRIT(87/191)/READ(88/190)

(01) PC READ complete
(02) PC WRITE complete
03 ASCII error Turns ON when an error occurs in the ASCII Unit, when the RESET

04 Port 1 error Turns ON when a buffer overflows or transmission error occurs in Port 1.

05 Port 2 error Turns ON when a reception buffer overflows or transmission error occurs in

06 Battery error Turns ON when the battery is low or removed
07 BASIC RUN Turns ON when a BASIC program is running
08 to 15

--- Not Used
Output data bits 0 to7Data output from the PC to the ASCII Unit. Read by the PC GET statement.

activates, or when the ASCII Unit restarts.

Turns OFF when the CLOSE statement is executed or the program is
stopped.

Port 2. Turns OFF when the CLOSE statement is executed or the program is
stopped.

Input data bits 0 to 7 Data output from the ASCII Unit to the PC. Written by the PC PUT

statement.

Program Execution

PC

Application
Program

Note When

the reset switch is turned ON, the data in word n+1 will be $FFF9. Restart
ing can be checked using bit 03 of word n+1.
When the ASCII Unit is restarted, the data of word n+1 will be 0000.

following diagram illustrates how the words and bits allocated to the ASCII

The
Unit relate to program execution.

WRIT(87/191) is executed when the data communication condition for
WRIT(87/191)

is

satisfied and the ASCII busy flag is cleared. If these conditions

are not met, the WRIT(87/191) is treated as a NOP.
READ(88/190)

and

the ASCII busy flag and ASCII write

is executed when the data communication condition is

tions are not met, the READ(88/190) is treated as a NOP.

WRIT(87/191)

(n)

Common
Memory

READ(88/190)

(n+1)

MOV(21/030)/OUT Output Data

(n) 08 to 15

MOV(21/030)/LD/OR

(n+1) 08 to 15

Write Data in n

PC READ

Read data in n+1

PC WRITE

PC GET

Input Data PC PUT

complete flag are OFF

ASCII Unit

BASIC
Program

satisfied

. If these condi

-

-

Timing

The WRIT(87/191) and READ(88/190) instructions are executed

and the com
mon memory is refreshed every time the PC completes one cycle of the pro­gram. I/O data, however, does not use the common memory (see above dia­gram) and is refreshed when the PC refreshes all the I/O data. Consequently

11

-

Data Configuration Section 2-2

there

is a time dif

I/O

data is set. This time dif

paring both the ASCII Unit and PC programs.

ference between when common memory data is set and when

ference must be taken into consideration when pre

-

1 cycle

MOV(21/030) WRIT(87/191)

With WRIT(87/191)

Data set in common
memory

The following diagram illustrates the various timing relationships between the
PC and ASCII Unit during data transfer.

Relationship between READ and WRITE Timing

Application Program

PC busy: n (00)

Write/Read data: n or n+1

PC Unit

PC write complete: n (01)

PC read complete: n (02)

BASIC Program

ASCII busy n+1 (00)

↔ common memory

PC WRITE PC READ

PC

→ ASCII

I/O refresh

Output data set

ASCII

→ PC

time

ASCII read complete: n+1 (01)

Read data
common memory

data

Write
ASCII → common memory

ASCII write complete: n+1 (02)

→ ASCII

Relationship between Output and Input Timing

Output

data

PC → ASCII: n (08 to 15)

Input data

ASCII → PC: n+1 (08 to 15)

2-2-2 Four-Word Configuration

In four-word mode, WRIT(87/191) and READ(88/190) instructions cannot be
used.

The ASCII Unit can be

panel DIP switch to ON.

Bit Allocation The

following two tables identify the individual bits in the four words allocated to

the

ASCII Unit. Notice that words n and n+1 are used for output and words n+2

PC READ

PC → ASCII

ASCII → PC

set to four-word mode by setting pin 5 of the front

PC WRITE

PC → ASCII

ASCII → PC

I/O refresh

12

Data Configuration Section 2-2

and n+3 are used for input. In this case, input and output are from the point of
view of the PC.

Bit Word n (OUT) Word n+1 (OUT) Word n+2 (IN) Word n+3 (IN)
00

Write Data 00 Read Data 00PC busy

01

Write Data 01

02

Write Data 02
Write Data 03

03

Write Data 04

04

Write Data 05

05

Write Data 06

06

Write Data 07

07

Write Data 08

08

Write Data 09

09

Write Data 10

10

Write Data 11

11

Write Data 12

12

Write Data 13

13

Write Data 14

14

Write Data 15

15

PC write complete
PC read complete
Restart
Interrupt No. 00
Interrupt No. 01
Interrupt No. 02
Interrupt No. 03
Output Data 00
Output Data 01
Output Data 02
Output Data 03
Output Data 04
Output Data 05
Output Data 06
Output Data 07

Read Data 01
Read Data 02
Read Data 03
Read Data 04
Read Data 05
Read Data 06
Read Data 07
Read Data 08
Read Data 09
Read Data 10
Read Data 11
Read Data 12
Read Data 13
Read Data 14
Read Data 15

ASCII busy
ASCII read complete
ASCII write complete
ASCII error
Port 1 error
Port 2 error
Battery error
BASIC RUN
Input Data 00
Input Data 01
Input Data 02
Input Data 03
Input Data 04
Input Data 05
Input Data 06
Input Data 07

13

Data Configuration Section 2-2

Bit Definitions

Word Bit Function Description

n 00

n+1 00 PC busy Set by the PC program when the PC accesses common memory, and cleared

n+2

n+3 00 ASCII busy Set when the ASCII Unit accesses the common memory and cleared when

to 15

01 PC write

02 PC read

03 Restart The ASCII Unit is activated at the trailing edge of this flag (when the flag goes

04 to 07

08 to 15

00 to 15

01 ASCII read

02 ASCII write

03 ASCII error Set when an ASCII Unit error occurs, when RESET is activated, or when the

04 Port 1 error Set when a reception buffer overflows or transmission error occurs at Port 1.

05 Port 2 error Set when a reception buffer overflows or transmission error occurs at Port 2.

06 Battery error Set when the battery is low or removed.
07 BASIC RUN Set when the BASIC program is running.
08 to 15

Write data bits
00 to 15

complete

complete

Interrupt number
bits 00 to 03

Output data bits
00 to 07

Read data bits
00 to 15

complete

complete

Input data bits
00 to 07

Data that will be written to the common memory from the PC by the MOV(21/030)
and read with the PC READ statement.

when memory access is terminated. The ASCII Unit cannot access the common
memory while this bit is set.

Momentarily set by the PC program when the PC has completed writing data to
the common memory. When this bit goes ON, the ASCII Unit read complete flag
n+3 (01) goes ON as well.

Momentarily set by the PC program when the PC has completed reading data
from the common memory. When this bit goes ON, the ASCII Unit write complete
flag n+3 (02) goes OFF as well.

OFF). A differentiated signal must be used for the Restart signal.
Serves as an interrupt number when the ON PC statement is used.When bits 00

to 03 are converted into hexadecimal 00 to 15, 00 is ignored and 01 to 15 are
used as valid interrupt numbers.

Data output from the PC to the ASCII Unit, written by the MOV and read with the
PC GET statement.

Data that will be written to the common memory from the ASCII Unit with the PC
WRITE statement and read with the MOV.

memory access is terminated. The PC cannot access common memory while this
bit is set.

Momentarily set when the PC write complete flag goes ON enabling the ASCII
Unit to read from common memory. This flag is cleared when the ASCII Unit
terminates the read operation.

Set at the time the ASCII Unit terminates a write operation to the common
memory and cleared when the PC read complete flag goes ON.

ASCII Unit restarts.

Turns OFF when the CLOSE statement is executed or the program is stopped.

Turns OFF when the CLOSE statement is executed or the program is stopped.

Data written with the PC PUT statement and read with the MOV.

14

Note 1. Apart

08

to 15 of word n+2 can be used for program control

ting the 8-bit data to the PC.

2. When
starting can be checked using bit 03 of word n+1.
When the ASCII Unit is restarted, the data of word n+1 will be 0000.

from the data used to

read bit 00 to 15 of word n+2, the input data of bit

of the PC by transmit

the reset switch is turned ON, the data in word n+1 will

be $FFF9. Re

-

-

Data Configuration Section 2-2

The

Program Execution

following diagram illustrates how the words and bits allocated to the ASCII

Unit relate to program execution.

rite data in n

W
PC READ

Read data in n+2
PC WRITE

PC GET

ASCII Unit

BASIC
Program

PC

Application
Program

MOV(21/030)

MOV(21/030)

MOV/OUT Output Data

MOV/LD/OR

Common
Memory

n+1 08 to 15
Input Data PC PUT

n+3 08 to 15

Timing The following diagram illustrates the various timing relationships between the

PC and ASCII Unit during data transfer.

Relationship between READ and WRITE Timing

Application program

PC busy: n+1 (00)

Write/Read data: n or n+2

PC Unit

PC write complete: n+1 (01)

↔ common memory

PC WRITE PC READ

PC

→ ASCII ASCII → PC

PC read complete: n+1 (02)

BASIC Program

ASCII busy n+3 (00)

ASCII read complete: n+3 (01)

Read data: n
common memory

Write data: n+2

→ common memory

ASCII
ASCII write complete: n+3 (02)

→ ASCII

Relationship between Output and Input Timing

Output

data

PC → ASCII: n+1 (08 to 15)

Input data

ASCII → PC: n+3 (08 to 15)

ASCII READ

PC READ

PC → ASCII

ASCII

→ PC

ASCII WRITE

PC WRITE

→ ASCII

PC

ASCII

→ PC

I/O refresh

15

SECTION 3

Programming and Communications

The first part of this section explains how the ASCII Unit and the PC exchange information.
The

second part of this section explains how to transfer programs from one device to another

is written on a personal computer

gram
Unit

program can be permanently stored in the ASCII Unit’

also be transferred back to the personal computer or other storage device.
The last part of this section explains how to run a BASIC program once it has been transferred to the ASCII Unit.

3-1 Programs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

3-2 Program Transfer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

3-3 Running the BASIC Program . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

3-4

Assembly Routines

. T

o run the program, it must be transferred to the RAM of the ASCII Unit. The ASCII

s EEPROM and also loaded from the EEPROM. The program can

. The ASCII Unit’

s BASIC pro

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

-

17

Program Transfer Section 3-2

3-1 Programs

To

use the ASCII

in

BASIC is needed. A data exchange routine must also be incorporated into the
PC program. The PC data exchange routine must set the number of words to be
transferred,
using the PC’s MOV(21/030) instruction.

There are two ways the ASCII Unit can communicate with the PC. In the first
method,

the PC controls the timing of the data transfer between
The ASCII Unit “requests” access to the PC data memory area using the PC
READ,
respond
performs

PC WRITE, PC GET

by setting either the read or write flag. The PC data exchange routine

the designated operations. When the PC is ready

is set and the ASCII Unit proceeds with the data transfer.
In the second method, the WRIT(87/191) and READ(88/190) instructions are

used

in conjunction with the PC READ, PC WRITE, PC GET

ments to transfer data.
This diagram illustrates the PC and ASCII Unit programs.

Unit in conjunction with the PC, an ASCII Unit program written

the base address, and the specific memory area. This can be done

the two devices.

, or PC

PUT statements, and then waits for the PC to

, the appropriate flag

, and PC PUT

state

-

Write/read
data
exchange

I/O data
exchange

PC program

General Program

General Program

This diagram illustrates the relationship between the PC data exchange code
and the ASCII Unit program.

PC program

MOV(21/030)

MOV(21/030)

MOV(21/030), OUT, etc.

MOV(21/030), OUT, etc.

Data exchange
code

ASCII Unit program

Data exchange
processing or I/O
program

ASCII Unit program

PC READ command

Common
memory

PC WRITE command

PC GET command

I/O
memory

PC PUT command

3-2 Program Transfer

Preparation For

18

the personal computer to communicate with the ASCII Unit, set the comput

er communication software as follows:
Baud rate: same as ASCII Unit

Data length: 8 bits
Parity: none
No. stop bits: 2

Full duplex, no echo, no XON/XOFF buf

Also:
Set

the ASCII Unit DIP

Hardware

-

fer busy control, no auto line

switches to the desired configuration (refer to

feed.

Section

1

).

Program Transfer Section 3-2

Transfer

The ASCII Unit’s BASIC or assembly language program must be written on a
personal computer which is connected to port 1 of the ASCII Unit through an
RS-232C
sonal

interface. A program can be transferred to the ASCII Unit from the per

computer or any other storage device connected to one of the communi
cation ports with the BASIC LOAD command or the S and L commands. Pro­grams can also be transferred from the ASCII Unit’s EEPROM to the ASCII
Unit’s RAM using the LOAD command.

Programs
personal

can be transferred

computer or other storage device connected to one of the communica

from the ASCII Unit’

s RAM to the EEPROM or to a

tion ports using the BASIC SAVE command.

ASCII Unit can be booted on

The

power up by a program stored in the EEPROM.

To do this set pin 2 of the front panel DIP switch on the ASCII Unit to ON.

Note 1. During

data transfer

baud

rate settings of the computer and the

overflow

error does occur

, an overflow may occur if

, set either a slower baud rate or specify XON with

the buf

fering capacity of the

ASCII Unit are not matched. If an

the OPEN command.

2. Programs
executing

The

FIT or LSS can be used to back up BASIC programs onto

named with PNAME cannot be transferred. Delete the name
PNAME “ ” if necessary before attempting to transfer a program.

floppy disks, con

sult the FIT or LSS Operation Manual.
The following figure illustrates the direction of data transfer when using the

SAVE and LOAD commands.

-

-

-

by

-

SAVE #1, “COMU:”
LOAD #1, “COMU:”

SAVE #2, “COMU:”
LOAD #2, “COMU:”

Note 1. The

Refer to the explanation of the OPEN statement for details on

2.

COMU.

EEPROM’

(1)

Computer or
other periph­eral device

(2)

Computer or
other periph­eral device

sn lifetime is limited to 5,000 write operations.

19