Contec F&eIT Series User manual

F&eIT Series
Isolated RS-422A/485 1ch
Communication Module
COM-1PD(FIT)GY
User’s Manual
CONTEC CO.,LTD.

COM-1PD(FIT)GY i
Check Your Package
Thank you for purchasing the CONTEC product.
The product consists of the items listed below.
Check, with the following list, that your package is complete. If you discover damaged or missing items,
contact your retailer.
Product Configuration List
- Module[COM-1PD(FIT)GY] …1
- First step guide …1
- CD-ROM [F&eIT Series Setup Disk] *1 …1
*1 The CD-ROM contains various software and User’s Manual (this manual)
Module
CH0
MODE
TERM
CH0
RX TX
Device
ID
COM-1 PD
12345678910
0
2
4
6
A
C
E
8
CD-ROM
[F&eIT Series Setup Disk]
First step guide

ii COM-1PD(FIT)GY
Copyright
Copyright 2003 CONTEC CO., LTD. ALL RIGHTS RESERVED
No part of this document may be copied or reproduced in any form by any means without prior written
consent of CONTEC CO., LTD.
CONTEC CO., LTD. makes no commitment to update or keep current the information contained in this
document. The information in this document is subject to change without notice.
All relevant issues have been considered in the preparation of this document. Should you notice an
omission or any questionable item in this document, please feel free to notify CONTEC CO., LTD.
Regardless of the foregoing statement, CONTEC assumes no responsibility for any errors that may
appear in this document nor for results obtained by the user as a result of using this product.
Trademarks
F&eIT is a registered trademark or trademark of CONTEC CO., LTD. Other company and product
names that are referred to in this manual are generally trademarks or registered trade trademark.

COM-1PD(FIT)GY iii
Table of Contents
Check Your Package............................................................................................................................ i
Copyright............................................................................................................................................ii
Trademarks .........................................................................................................................................ii
Table of Contents ..............................................................................................................................iii
1. BEFORE USING THE PRODUCT 1
About the Module............................................................................................................................... 1
Features........................................................................................................................................ 1
Customer Support............................................................................................................................... 2
Web Site....................................................................................................................................... 2
Limited One-Year Warranty............................................................................................................... 2
How to Obtain Service ....................................................................................................................... 2
Liability .............................................................................................................................................. 2
Safety Precautions .............................................................................................................................. 3
Safety Information....................................................................................................................... 3
Handling Precautions................................................................................................................... 4
Inspection..................................................................................................................................... 6
Storage......................................................................................................................................... 6
Disposal ....................................................................................................................................... 6
2. MODULE NOMENCLATURE AND SETTINGS 7
Nomenclature of Module Components .............................................................................................. 7
Setting a Device ID ............................................................................................................................ 7
Setup Method............................................................................................................................... 8
Setting Transmission Mode......................................................................................................... 9
Setting of Terminator ................................................................................................................ 10
LED Indicator................................................................................................................................... 11
3. CONNECTING TO AN EXTERNAL DEVICE 13
Interface Connector .......................................................................................................................... 13
How to Connect an Interface Connector................................................................................... 13
Types of Cable and Example Connections ......................................................................................14

iv COM-1PD(FIT)GY
4. FUNCTIONS 15
Communication Function .................................................................................................................15
Serial Data Transmission...........................................................................................................15
RS-422A/485 Control Lines......................................................................................................15
Send and Receive Data Buffers.................................................................................................15
Setting the Baud Rate ................................................................................................................16
Automatic RTS Control Functions............................................................................................18
Other Functions ................................................................................................................................ 18
Bus Isolation ..............................................................................................................................18
Surge Protection.........................................................................................................................18
5. USING THE MODULE 19
Compatible and Enhanced Modes....................................................................................................19
Operating under CPU-SB303-FIT....................................................................................................20
Details on I/O Ports and Registers ...................................................................................................23
Interrupt Vector Registers ................................................................................................................27
Using an Interrupt............................................................................................................................. 28
Examples........................................................................................................................................... 29
Compatible Mode ......................................................................................................................30
Enhanced Mode ......................................................................................................................... 33
6. SYSTEM REFERENCE 37
Block Diagram..................................................................................................................................37
Equivalence Circuit .......................................................................................................................... 38
Specification .....................................................................................................................................39
External Dimensions.........................................................................................................................40

1. Before Using the Product
COM-1PD(FIT)GY 1
1. Before Using the Product
This chapter provides information you should know before using the product.
About the Module
The COM-1PD(FIT)GY performs serial communication with an external device in compliance with
RS-422A/485, capable of serving as COM3 or COM4 of an F&eIT series microcontroller unit.
The module can also serve as an expansion COM port for a media converter [RP-COM(FIT)H,
RP-COM(FIT)H-AF, or FX-DS540-COM2].
Please read this manual carefully to create application programs and configure the system, such as
setting the switches and connecting it to external devices.
Features
- RS-422A/485 serial communication ports
- The communication lines are electrically isolated from the module.
- High-speed communication is supported at up to 921,600bps (115,200bps in compatible mode).
- A baud rate can be set by software.
- The module has 128-byte FIFO buffers for transmit and receive.
- Driver software is supplied to allow the serial ports to be used as standard Windows or Linux COM
ports. *1
- The data transfer mode (full duplex or half duplex) can be set by a switch.
- The board includes a 100Ωterminating resistor required for multi-drop (party line) connections.
The resistor can be inserted into the signal line by a switch.
- Surge protection is provided for each RS-422A/485 signal line.
- Up to three units can be added (at the time of enhanced mode) as expansion ports for micro
controller unit. *2
- Up to three units can be added as expansion ports for media converters [RP-COM(FIT)H,
RP-COM(FIT)H-AF, FX-DS540-COM2].
- Similar to other F&eIT series products, the system, in the module itself, incorporates a 35-mm DIN
rail mounting mechanismas a standard item. A connection to a controller module can be effected on
a lateral, stack basis in a unique configuration, which permits a simple, smart system configuration
without the need for a backplane board.
*1: When using it as the expansion port for micro controller unit
*2: Two units can be added at the time of compatible mode

1. Before Using the Product
2COM-1PD(FIT)GY
Customer Support
CONTEC provides the following support servicesfor you to use CONTEC products more efficiently and
comfortably.
Web Site
Japanese http://www.contec.co.jp/
English http://www.contec.com/
Chinese http://www.contec.com.cn/
Latest product information
CONTEC provides up-to-date information on products.
CONTEC also provides product manuals and various technical documents in the PDF.
Free download
You can download updated driver software and differential files as well as sample programs available in
several languages.
Note! For product information
Contact your retailer if you have any technical question about a CONTEC product or need its price,
delivery time, or estimate information.
Limited One-Year Warranty
CONTEC products are warranted by CONTEC CO., LTD. to be free from defects in material and
workmanship for up to one year from the date of purchase by the original purchaser.
Repair will be free of charge only when this device is returned freight prepaid with a copy of the original
invoice and a Return Merchandise Authorization to the distributor or the CONTEC group office, from
which it was purchased.
This warranty is not applicable for scratches or normal wear, but only for the electronic circuitry and
original modules. The warranty is not applicable if the device has been tampered with or damaged
through abuse, mistreatment, neglect, or unreasonable use, or if the original invoice is not included, in
which case repairs will be considered beyond the warranty policy.
How to Obtain Service
For replacement or repair, return the device freight prepaid, with a copy of the original invoice. Please
obtain a Return Merchandise Authorization Number (RMA) from the CONTEC group office where you
purchased before returning any product.
* No product will be accepted by CONTEC group without the RMA number.
Liability
The obligation of the warrantor is solely to repair or replace the product. In no event will the warrantor
be liable for any incidental or consequential damages due to such defect or consequences that arise from
inexperienced usage, misuse, or malfunction of this device.

1. Before Using the Product
COM-1PD(FIT)GY 3
Safety Precautions
Understand the following definitions and precautions to use the product safely.
Safety Information
This document providessafety information using thefollowing symbols to prevent accidents resulting in
injury or death and the destruction of equipment and resources. Understand the meanings of these labels
to operate the equipment safely.
DANGER DANGER indicates an imminently hazardous situation which, if not avoided, will
result in death or serious injury.
WARNING WARNING indicates a potentially hazardous situation which, if not avoided, could
result in death or serious injury.
CAUTION CAUTION indicates a potentially hazardous situation which, if not avoided, may
result in minor or moderate injury or in property damage.

1. Before Using the Product
4COM-1PD(FIT)GY
Handling Precautions
CAUTION
Take the following precautions when handling this module.
- Do not modify the module. CONTEC will bear no responsibility for any problems, etc., resulting
from modifying this module.
- Do not use or store the equipment in a hot or cold place, or in a place that is subject to severe
temperature changes. (Operating temperature range: 0 to 50°C)
- Do not use or store the equipment in a place subject to direct sunlight or near a heating device, such
as a stove.
- Do not use or store the equipment in a dusty or humid place. (Operating humidity range: 10 to
90%RH, no condensation)
- As this product contains precision electronic components, do not use or store in environments
subject to shock or vibration.
- Do not use or store the product near equipment generating a strong magnetic field or radio waves.
- If you notice any strange odor or overheating, please unplug the power cord immediately.
- In the event of an abnormal condition or malfunction, please consult the dealer from whom the
equipment was purchased.
- To avoid electric shock, please do not touch the system with a wet hand.
- Do not open the module casing. CONTEC will disclaim any responsibility for equipment whose
casing has been opened.
- To prevent damage, please do not subject the module to impact or bend it.
- To prevent contact malfunction, please do not touch the metallic pins on the external module
connector.
- The module contains switches that need to be properly set. Before using the module, please check
its switch settings.
- To avoid malfunction, please do not change the module switch settings in an unauthorized manner.
- "Do not operate the device module when the power for the Controller Module is on.
To avoid malfunction, please be sure to turn off the power for the Controller Module."
- Regarding “EMC Instruction Class A Notice and FCC Part 15 Class A Notice and VCCI Class A”
This product has acquired the above-mentioned standard.
However, a sufficient margin may not be secured for the standard. In this case, use a ferrite core
(SEIWA E04SR301334 or an compatible product) for both ends of the COM cable.
When attaching the ferrite core, coil it around once near the connector while leaving it open, and
then close it.
If a mouse is connected to your microcontroller, as a rider to the EMC Directive for a Class A
product, a ferrite core (SEIWA E04SR301334 or a compatible product) must be used for the mouse
cable.
When attaching the ferrite core, coil it around twice near the connector while leaving it open, and
then close it.

1. Before Using the Product
COM-1PD(FIT)GY 5
FCC PART 15 Class A Notice
This equipment has been tested and found to comply with the limits for a Class A digital device,
pursuant to part 15 of the FCC Rules. These limits are designed to provide reasonable protection
against harmful interference when the equipment is operated in commercial environment.
This equipment generates, uses, and can radiate radio frequency energy and, if not installed and
used in accordance with the instruction manual, may cause harmful interference to radio
communications. Operation of this equipment in a residential area is likely to cause harmful
interference at his own expense.
NOTE
Change or modifications not expressly approved the manufacturer can void the user's authority to
operate this equipment.
WARNING TO USER