YOKOGAWA F3RS22-0N, F3RS41-0N User Manual

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User’s Manual

Serial Communication Modules

IM 34M6H21-01E

Yokogawa Electric Corporation

IM 34M6H21-01E

2nd Edition

Applicable Product:

z Range-free Multi-controller FA-M3

Model: F3RS22-0N Name: RS-232-C Communication Module Model: F3RS41-0N Name: RS-422 Communication Module

The document number and document model code for this manual are given below. Refer to the document number in all co mmunications; also refer to the document number or

the document model code when purchasing additional copies of this manual.

Document No.: IM 34M6H21-01E Document Model Code: DOCIM

IM 34M6H21-01E 2nd Edition : Aug, 2001-00

Important

 About This Manual

- This Manual should be passed on to the end user.

- Before using the controller , read this manual thoroughly to have a clear understanding of the controller .

- This manual explains the functions of this product, but there is no guarantee that they will suit the particular purpose of the user.

- Under absolutely no circumst ances may t he content s of this manu al be transcr ibed or copied, in part or in whole, without permission.

- The contents of this manual are subject to change without prior notice.

- Every effort has been made to ensure accuracy in the preparation of this manual. However, should any errors or omissions come to the attention of the user, please contact the nearest Yokogawa Electric representative or sales office.

 Safety Precautions when Using/Maintaining the Product

- The following safety symbols are used on the product as well as in this manual.



Danger. This symbol on the product indicates that the operator must follow the instructions laid out in this instruction manual to avoid the risk of personnel injuries, fatalities, or damage to the inst rument. The manual describes what special care t he operator must exercise to prevent electric al shock or other dangers that may result in injury or the loss of life.

Protective Ground Terminal. Before using the instrument, be sure to ground this terminal.

Function Ground Terminal. Before using the instrument, be sure to ground this terminal.

Alternating current. Indicates alternating current.

Direct current. Indicates direct current.



IM 34M6H21-01E 2nd Edition : Aug, 2001-00

The following symbols are used only in the instruction manual.

iii

WARNING

Indicates a “Warning”. Draws attention to information essential to prevent hardware damage, software damage or system failure.

CAUTION

Indicates a “Caution” Draws attention to information essential to the understanding of operation and functions.

TIP

Indicates a “TIP” Gives information that complements the present topic.

Introduction

 Overview of the Manual

This manual, “Serial Communication Modules” (IM 34M6H21-01E), explains the specifications and handling of the Serial Communication of the FA-M3.

 Other Manuals

The manuals to reference depends on the CPU type. Refer to the following manuals accordingly.



For BASIC CPU modules F3BP20 and F3BP30

- BASIC CPU Module and YM-BASIC/FA Programming Language (IM 34M6Q22-01E)



Common for all sequence CPU modules

For the FA-M3 specifications and configurations*1, installation and wiring, test run, maintenance, and module installation limits for the whole system:

*1: Refer to the relevant product ma nu als fo r s pe cifications except for pow er su pply modules, base modules, input /o utp ut

modules, cables and terminal units.

- Hardware Manual (IM 34M6C11-01E), 6th Edition or later

viii

IM 34M6H21-01E 2nd Edition : Aug, 2001-00

Copyrights and Trademarks

 Copyrights

Copyrights of the programs and online manual included in this CD-ROM belong to Yokogawa Electric Corporation.

This online manual may be printed but PDF security settings have been made to prevent alteration of its contents.

This online manual may only be printed and used for the sole purpose of operating this product. When using a printed copy of the online manual, pay attention to possible inconsistencies with the latest version of the online manual. Ensure that the edition agrees with the latest CD-ROM version.

Copying, passing, selling or distribution (including transferring over computer networks) of the contents of the online manual, in part or in whole, to any third party, is strictly prohibited. Registering or recording onto videotapes and other media is also prohibited without expressed permission of Yokogawa Electric Corporation.

 Trademarks

The trade names and company names referred to in this manual are either trademarks or registered trademarks of their respective companies.

IM 34M6H21-01E 2nd Edition : Aug, 2001-00

Blank Page

FA-M3

Serial Communication Modules

Applicable Product....................................................................................i

Important...................................................................................................ii

Introduction............................................................................................viii

Copyrights and Trademarks....................................................................ix

1. Overview ....................................................................................... 1-1

2. F3RS22-0N .................................................................................... 2-1

2.1 Standard Specifications......................................................................... 2-1

 Model and Suffix Codes ...................................................................... 2-1

 Operating Environment........................................................................2-1

 Physical Specifications........................................................................2-1

 Function Specifications........................................................................ 2-1

 Components and Their Functions ....................................................... 2-3

 External Dimensions............................................................................ 2-3

2.2 External Wiring .......................................................................................2-4

 Connector Pin Assignments ................................................................ 2-4

 Directly Connecting to an RS-232-C Device (DTE: Data Terminal

Equipment) .......................................................................................... 2-5

 Connecting to a Modem (DCE: Data Communication Equipment).....2-6

 Notes on Wiring...................................................................................2-8

2.3 Attaching and Deta ching Modules........................................................2-9

TOC-1

IM 34M6H21-01E 2nd Edition

3. F3RS41-0N Communication Module........................................... 3-1

3.1 Standard Specifications......................................................................... 3-1

 Model and Suffix Codes ...................................................................... 3-1

 Operating Environment........................................................................ 3-1

 Physical Specifications........................................................................3-1

 Function Specifications........................................................................ 3-1

 Components and their Functions.........................................................3-2

 External Dimensions............................................................................ 3-3

3.2 External Wiring .......................................................................................3-4

 RS-422/RS-485 Terminal Block........................................................... 3-4

 Four-Wire System................................................................................ 3-4

 Two-Wire System ................................................................................ 3-5

 Notes on Wiring...................................................................................3-5

3.3 Attaching and Deta ching Modules........................................................3-5

IM 34M6H21-01E 2nd Edition : Aug, 2001-00

TOC-2

4. Using the Communication Module ..............................................4-1

4.1 Basic Communications ..........................................................................4-1

 Declaring Use of the Module................................................................4-1

 Resetting the Module ...........................................................................4-1

 Setting Communication Conditions......................................................4-1

 Output...................................................................................................4-2

 Input ....................................................................................................4-3

4.2 Transmission Text and Format Specifications.....................................4-4

 Data Output..........................................................................................4-4

 Data Input.............................................................................................4-5

4.3 Efficient Communication........................................................................4-7

 Interrupt Input.......................................................................................4-7

 TRANSFER..........................................................................................4-8

4.4 Using Registers.....................................................................................4-11

 List of Registers .................................................................................4-11

 Format of Received Text....................................................................4-12

 XON/XOFF Control ............................................................................4-14

 Break Signal.......................................................................................4-14

4.5 Special Communications .....................................................................4-15

 Long Text............................................................................................4-15

 Binary Transmission...........................................................................4-15

 Handling Null Codes ..........................................................................4-16

 Inserting Binary Data into Text ...........................................................4-17

4.6 Multi-point Connection.........................................................................4-18

 External Connection...........................................................................4-18

 Setting Registers................................................................................4-19

 Setting Terminating Resistors ............................................................4-19

 Protocol Processing ...........................................................................4-20

5. BASIC Statements and Error Codes............................................5-1

5.1 BASIC Statements...................................................................................5-1

5.2 Error Codes..............................................................................................5-2

5.3 Sample Programs....................................................................................5-3

Appendix 1. Signal Description and Direction of

Signal Lines (RS-232-C)......................................Appx. 1-1

Appendix 2. Data Transmission ..............................................Appx. 2-1

Appendix 3. ASCII Codes.........................................................Appx. 3-1

Revision Information.................................................................................i

IM 34M6H21-01E 2nd Edition : Aug, 2001-00

1. Overview

The F3RS22-0N is a communication module that can be used with F3BP20 or F3BP30 BASIC CPU modules for RS-232 communication. It has two ports t hat use D- sub 9- pin connectors for connection and allows transmission to a maximum distance of 15 metres.

BASIC statements are available as a means to exchange data through a communication line. Each port in the F3RS22-0N operates independently and communication error in a port does not affect operations of the other ports.

The F3RS41-0N is a communication module that can be used with F3BP20 or F3BP30 BASIC CPU modules for RS-422-A or RS-485 communication. It has one port that uses a terminal block for connection and allows transmission to a maximum distance of 1200 metres.

BASIC statements are available as a means to exchange data through a communication line. For details on the differences between RS-422-A and RS-485 communication, see Section 3.1, “Standard Specifications  Physical Specifications” and Section 4. 6, “Multi-point”.

Table 1.1 Types of Communication Modules

Model Description

F3RS22-0N RS-232-C communication modul e F3RS41-0N RS-422 communication module

1-1

CAUTION

F3RS22-0N and F3RS41-0N communication modules are not accessible from ladder sequence CPU modules. They are to be used with F3BP20 and F3BP30 BASIC CPU modules.

IM 34M6H21-01E 2nd Edition : Aug, 2001-00

Blank Page

2. F3RS22-0N

2.1 Standard Specifications

 Model and Suffix Codes

2-1

Model Code Suffi x Code Style Code

F3RS22 -0N

 Operating Environment

F3RS22-0N can be used with the following CPU modules.

CPU Modules

BASIC CPU module

 Physical Specifications

Item Specifications

Interface EIA RS-232C compliant Number of communication ports 2 (non-isolated)

Transmission distance 15 m maximum Connector D-Sub 9-pin (female) M2.6 mm

Current consumption 135 mA External Dimensions 28.9 (W) u 100 (H) u 83.2 (D) (mm)* Weight 120 g

* : Dimensions excluding protrusions. See figure on External Dimensions .

Additional

…… ……

Style

F3BP20 F3BP30

Code

Remarks

Max. 19200 bps, two RS-232-C ports

 Function Specifications

Item Specifications Default

Connection Point-to-point Communication mode Full-duplex/half-duplex

Synchronization Start-stop Protocol Non-procedural

Character length 7/8 bits 8 bits

Character frame

Transmission rate 75/150/300/600/1200/2400/4800/9600/ 19200 bps 4800

Control/checking of control line

Stop bit length 1/1.5/2 bits 1 bit Parity bit None/odd/even Even

RS control DR check CD check

ER control

(1) Always on (2) On only when a control line message is being sent (1) Transmits regardless of the state of DR. (2) Transmits only when DR is on.

(1) Transmits regardless of the state of CD. (2) Transmits only when CD is off.

(1) On (ready) (2) Off (not ready)

(to be continued on the next page)

  



(1) (1) (1)

IM 34M6H21-01E 2nd Edition : Aug, 2001-00

Communic ation buffer

Transmitting buffer

Receiving buffer Rotary (FIFO) buffer of 2,048 bytes

2-2

Item Specifications Default

Can buffer one text item (maximum lengt h of 1,024 bytes).



Starting character

- Y es/no

- One-character length; any charact er is acceptable

- Y es/no

- Two-character length maximum; any charact er (string) i s acceptable

- Also serves as an ending character during transmission.

- Yes

- Effective range: 1 to 1024 (over the communication line)

- Configurable in 1-ms units; precis ion: 10 ms

- Effective range: 0 to 32760 (if set to 0, there is no monitoring of the character-to-c haracter time interval)

Processed as a communication failure/processed as the normal end of receiving

$0D (CR-LF)

1024

1.5 s

Normal end of receiving

Receive text format

Ending character (Terminator)

Designation of number of characters

Monitored character-t o-character ti me interval Character-to-character receiving interval time-out process

(1) Uncontrolled (2) Receiving line only (3) Transmitting line only (4) Both transmitting and receiving lines

One-character length; any character is acceptable

Uncontrolled

$13 (DC3)

XON/X control

Control method

OFF

XON character $11 (DC1)

character

OFF

Internal code

Transmission code Internal code/ASCII code*1/JIS 8-bit code*2

(ASCII- equivalent)

I/O monitoring

Interrupt mask

Monitored time before I /O completion

Monitored time before transmission start

Break transmis sion interval End of receiving Interrupt permitted/prohibited Prohibited

Receive failure Interrupt permit ted/prohibited Prohibited

Configurable in 1-ms uni ts from 1 to 32760 ms; accuracy: 10 ms

Time not monitored/time monitored (configurable in 1-ms units from 1 to 32760 ms; accuracy: 10 ms )

Configurable in 1-ms uni ts from 1 to 32760 ms; accuracy: 10 ms

30 s Time not

monitored 400 ms

Break receiving Interrupt permitted/prohibited Prohibited

*1 During input, k ana and k anji characters are replaced with spaces. *2 During output, kanji charac t ers are replac ed with JIS double-byte codes, while other characters not def ined as J I S

characters are replaced with spaces.

Note: JIS c ode s yst em s : J I S X0201, JI S X0208



$0A

IM 34M6H21-01E 2nd Edition : Aug, 2001-00

 Components and Their Functions

2-3

RDY

RS22-0N

RS232C

 External Dimensions

READY indicator (lit when the internal circuitry is in normal operation)

Port 1

Port 2

(Unit: mm)

83.2 28.9

6.7 2

100

Note: When an RS-232-C cable is connected to the module, add 90 mm to the 83-mm depth across the bottom of t he

module to allow for approximately 173 mm as the mounting depth to accommodate the base module, the RS-232-C connector and the bending radius of the RS-232-C cable,.

IM 34M6H21-01E 2nd Edition : Aug, 2001-00

2.2 External Wiring

 Connector Pin Assignments

The following figure shows how the module’s connector looks when viewed externally.

2-4

D-Sub 9-pin

Connector (Female)



Number

1 CD Data

2 RD Receive 3 SD Send Data no

4 ER Data

5 SG Signal 6 DR Data Set

7 RS Request to

8 CS Clear to

9 — Unused no no

Signal

Name

Carrier Detect

Data

Terminal Ready

Ground Ready

Send

* : Option (1) or (2) c an be s et us ing a BASI C program.

Signal Directi on

FA-M3 Remote

equipment

yes Permission to transmit from the remot e equipment.

Signal

Monitoring

(yes/no)

yes

Purpose *

Receives only when this signal is on. Sending pr oceeds as follows: (1) Transmits regardless of the state of CD (default). (2) Transmits only when CD is off.

(1) ER turns on when power is switched on and stays on (default). (2) Turns on and off by software

Used to check if remote equipment is ready for receiving (1) Receives regar dless of the state of DR (default). (2) Receives only when DR is on.

Used when transmitting data to the remote equipment (1) Always on (default). (2) Turns on only during transmis sion

Transmits only when this signal is on.

IM 34M6H21-01E 2nd Edition : Aug, 2001-00

 Directly Connecting to an RS-232-C Device (DTE: Data Terminal

Equipment)

Example internal cable connection diagram for D-sub 25-pin remote

equipment

2-5

Null-modem cable

Pin no.

Connector cover

(SD) 3 (RD) 2

F3RS22-0N

D-sub 9-pin

Note: This example illustrates the case where the remote DTE uses D-sub 25-pin.

(RS) 7 (CS) 8 (DR) 6 (SG) 5 (CD) 1 (ER) 4

Examples of cables with the above internal connection are the YCB cables supplied by Yokogawa.

Shield

Pin no. Connector cover

1 (FG) 2 (SD) 3 (RD)

Remote DTE

4 (RS)

(D-sub 25-pin)

5 (CS) 6 (DR) 7 (SG) 8 (CD) 20 (ER)

z Example internal cable connection diagram for D-sub 9-pin remote

equipment

Null-modem cable

Pin no.

Connector cover

(SD) 3 (RD) 2

F3RS22-0N D-sub 9-pin

(RS) 7 (CS) 8 (DR) 6 (SG) 5 (CD) 1 (ER) 4

Shield

Pin no. Connector cover

3 (SD) 2 (RD) 7 (RS)

Remote DTE

8 (CS)

D-sub 9-pin

6 (DR) 5 (SG) 1 (CD) 4 (ER)

z Connect the shielded wire as instructed below:

(1) Use a cable with connectors housed in metal or metal-plated covers. Connect the

shielded wire directly to the connector covers.

(2) Note that the connector shell of an F3RS22-0N module is connected internally to

the FG (frame ground) terminal of an FA-M3 power supply module.

z Introduction to Yokogawa-supplied cables

The following null modem cables are available from Yokogawa.

Model Code Suffix Code Specifications

YCB215 RS-232-C null modem cable (with control line) with 9- and 25-pin

-KM01

-KM05

-KM15

YCB216

-KM01

-KM05

-KM15

Note: These cables should be terminated for indoor use.

connectors



ML gateway card (CP7

) for connecting RS-232-C devices.

1 m long 5 m long

15 m long RS-232-C null modem cable (without control li ne) with 9- and

25-pin connectors



ML gateway card (CP7

) for connecting RS-232-C devices

1 m long 5 m long

15 m long

IM 34M6H21-01E 2nd Edition : Aug, 2001-00

z Diagrams of internal cable connections

2-6

YCB215



CN1 side (FA-M3)

PIN No.

Connector cover

Shield





FG SD

RD RS CS DR

SG CD ER

CN2 side

PIN No. Connector cover

1 2

3 4 5 6

7 8 20





YCB216





CN1 side (FA-M3)

PIN No.

Connector cover

CN2 side

Shield

7 8

FG SD RD

PIN No. Connector cover

1 2



 Connecting to a Modem (DCE: Data Communication Equipment)

Internal cable connection diagram for D-sub 25-pin remote equipment

Modem cable

F3RS22-0N

(D-sub 9-pin)

Note: This example illustrat es t he c as e where the remote DCE uses D-sub 25-pin.

Pin No.

Connector cover

(SD) 3 (RD) 2 (RS) 7 (CS) 8 (DR) 6 (SG) 5 (CD) 1 (ER) 4

An example of a cable with the above internal connection is the YCB211 cable supplied by Yok ogawa.

Pin No. Connector cover 1 (FG)

2 (SD) 3 (RD) 4 (RS)

Remote DCE

5 (CS)

(D-sub 25-pin)

6 (DR) 7 (SG) 8 (CD) 20 (ER)

IM 34M6H21-01E 2nd Edition : Aug, 2001-00

CN2 side

z Internal cable connection diagram for D-sub 9-pin remote equipment

Modem cable

Connector cover

F3RS22-0N

(D-sub 9-pin)

z Connecting using sheilded cables

(1) Use a cable with connectors housed in metal or metal-plated covers. Connect the

shielded wire directly to the connector covers.

(2) Note that the connector shell of an F3RS22-0N module is connected internally to

the FG (frame ground) terminal of an FA-M3 power supply module.

z Introduction to Yokogawa-supplied cables

Pin No.

(SD) 3 (RD) 2 (RS) 7 (CS) 8 (DR) 6 (SG) 5 (CD) 1 (ER) 4

Pin No. Connector cover

3 (SD) 2 (RD) 7 (RS)

Remote DCE

8 (CS)

(D-sub 9-pin)

6 (DR) 5 (SG) 1 (CD) 4 (ER)

2-7

The following modem cables are available from Yokogawa. The model codes, specifications and wiring diagrams of these cables are summarized below:

Model Name

YCB211 RS-232-C modem cable (without control line) wi th 9- and 25-pin connector s

Note: These cables should be terminated for indoor use.

Suffix Code Specification



) for connecting modems.

-KM01

-KM05

-KM15

ML gateway card (CP7 1 m long

5 m long 15 m long

z Diagrams of internal cable connections



YCB211



CN1 side (FA-M3)

PIN No.

Connector cover

3 2 7 8 6 5 1 4 9

SD RD RS CS DR SG CD ER CI

Shield

FG SD RD RS CS DR SG CD ER CI

PIN No. Connector cover

1 2 3 4 5 6 7 8 20 22



IM 34M6H21-01E 2nd Edition : Aug, 2001-00

 Notes on Wiring

The connector shell of an F3RS22-0N module is connected internally to the FG terminal of an FA-M3 power supply module.

(1) When connecting the F3RS22-0N module via a modem:

The module should be no more than 5 m away from the modem.

(2) When connecting the F3RS22-0N module not via a modem:

Ground the module in common with the remote equipment.

(3) For conforming equipment incorporating the F3RS22-0N to CE Marking, use a

shielded cable. Remove the cable cover to expose the wire, ground and secure the wire with a FG clamp.

FA-M3 Remote

equipment

JIS Class 3 grounding (grounding resistance of 100

or less)



2-8

Shielded cable

Remove the cover and secure with an FG clamp.

F3RS22-0N

Screw the clamp to the metal plate o f the panel enclosure to ground it.

IM 34M6H21-01E 2nd Edition : Aug, 2001-00

2.3 Attaching and Detaching Modules

 Attaching/Detaching Modules

Figure 2.1 shows how to attach this module to the base module. First hook the anchor slot at the bottom of the module to be attached onto the anchor pin on t he bot t om of the base module. Push the top of this module towards the base module until the anchor/release button clicks into place.



2-9

CAUTION

Always switch off the power before attaching or detaching a module.

Anchor pin

Counter module

Figure 2.1 Attaching Modules

Base module

F01.VSD

CAUTION

DO NOT bend the connector on the rear of the module by force during the above operation. If the module is pushed with improper force, the connector may bend causing an error.

 Detaching Modules

To remove this module from the base module, reverse the above operation. Press the anchor/release button on the top of this module to unlock it and tilt the module aw ay from the base module. Then lift the module off the anchor pin at the base.



IM 34M6H21-01E 2nd Edition : Aug, 2001-00

 Attaching Modules in Intense Vibration Environments

If the module is used in intense vibration environments, fasten the module with a screw. Use screws of type listed in the table below. Insert these screws into the screw holes on top of the module and tighten them with a Phillips screwdriver.



M4-size Binder screw 12 to 15 mm long

(or 14 to 15 mm if fitt ed with a washer)



Figure 2.2 Tightening the Module

Screw Required

F02R1.VSD

2-10

IM 34M6H21-01E 2nd Edition : Aug, 2001-00

3. F3RS41-0N Communication Module

3.1 Standard Specifications

 Model and Suffix Codes

3-1

Model Code Suffi x Code Style Code

F3RS41 -0N

 Operating Environment

F3RS41-0N can be used with the following CPU modules.

CPU Modules

BASIC CPU module

 Physical Specifications

Item Specifications

Interface EIA RS-422A, EIA RS-485 compliant Number of communication ports 1 (isolated)

Maximum number of connectable drivers or receivers

Transmission distance 1,200 m maximum Connector Six-pole terminal block with 3.5-mm scr ews

Current consumption 210 mA (5 V DC) Dimensions 28.9 (W)

Weight 110 g

Additional

…… ……

F3BP20 F3BP30

RS-422A RS-485 1 driver

10 receivers

Code

Max. 19200 bps, one RS-422-A/RS485 port

Style

 

100 (H) u 83.2 (D) (mm)

32 drivers 32 receivers

Remarks

 Function Specifications

Item Specifications Default

Connection Point-to-point (multipoint also allowed) Communication mode

Synchronization Start-stop Protocol Non-procedural

Character length 7/8 bits 8 bits

Character frame

Transmission rate 75/150/300/600/1200/2400/4800/9600/ 19200 bps 4800 Communication

buffer

Stop bit length 1/1.5/2 bits 1 bit Parity bit None/odd/even Even

Transmitting buffer Receiving buffer Rotary ( FIFO) buffer of 2,048 bytes

Full-duplex/half-dupl ex 4-wire sytem/2-wire system

Can buffer one text item (maximum lengt h of 1,024 bytes)

(to be continued on the next page)



 



 

IM 34M6H21-01E 2nd Edition : Aug, 2001-00

Item Specifications Default

Starting character

- Yes/no

- One-character length; any charact er is acceptable

- Yes/no

Ending character (Terminator)

- Two-character length maximum; any character (string) i s acceptable

- Also serves as an ending character during

$0D (CR-LF)

transmission.

Receive text format

Designation of number of character s

Monitored characterto-character time interval

- Yes

- Effective range: 1 to 1024 (over the communication line)

- Configurable in 1-ms units; precis ion: 10 ms

- Effective range: 0 to 32767 (if set to 0, there is no monitoring of the character-to-c haracter time interval)

1024

1.5s

Character-tocharacter receiving interval time-out

Processed as a communication failure/processed as the normal end of receiving

Normal end of receiving

process

(1) Uncontrolled (2) Receiving line only (3) Transmitting line only (4) Both transmitting and receiving lines

One-character length; any character acceptable

Uncontrolled

$13(DC3)

XON/X control

OFF

Control method

XON character $11(DC1)

character

OFF

Internal code

Transmission code Internal code/ASCII code*1/JIS 8-bit code*2

(ASCIIequivalent)

Monitored time before I /O completion Break transmis sion interval

Interruption mask

*1 During input, k ana and k anji characters are replaced with spaces. *2 During output, kanji charac t ers are replac ed with JIS double-byte codes, while other characters not def ined as J I S

Note: JIS c ode s yst em s : J I S X0201, JI S X0208

End of receiving Interruption permitted/prohibited Prohibited Receive failure Interrupt ion permitted/prohibited Prohibited Break receiving

characters are replaced with spaces.

Interruption permitted/prohibited Prohibited

Configurable in 1-ms uni ts from 1 to 32760 ms; precision: 10 ms Configurable in 1-ms uni ts from 1 to 32760 ms; precision: 10 ms

30 ms 400 ms

3-2

$0A

 Components and their Functions

RDY

RS41-0N

TERMINATOR

2- 4-WIRE

OFF

SD A

SD B

RD A

RD B

SHIELD

RS422

READY indic ator:

(lit when the internal circuit is in normal operation)

Teminating resistor selector switch:

When the module is terminal in the line, use this switch to select either "4-WIRE" or "2-WIRE."

RS-422/RS-485 terminal block

(Six terminals with 3.5-mm screws)

IM 34M6H21-01E 2nd Edition : Aug, 2001-00

 External Dimensions

3-3

(Unit: mm)

83.2 28.9

12.1 2

100

IM 34M6H21-01E 2nd Edition : Aug, 2001-00

Remote equipment

Terminating resistor

3.2 External Wiring

This subsection explains the point-to-point wiring methods. For multi-point connection, see Section 4.6, “Multi-point Connections.” For two-wire systems, register setting is required. See Section 4.6 " Setting Registers".

 RS-422/RS-485 Terminal Block

3-4

SD A

SD B

RD A

RD B

SHIELD

Applicable wire Size: 0.3 to 1.25 mm2 thick

Wiring method Crimp-on Crimp-on terminal

Connection Terminal block

 Four-Wire System

F3RS41-0N module’s

port terminals

SD A

Send data A

SD B

Send data B

RD A

Send data A

RD B

Send data B Signal ground

SG SHIELD SHIELD terminal

7.3mm

(AWG 22 to 18) Example: CO-SPEV-SB (A) 3P Cable, Limited.

Crimp-on terminal For 3.5-mm size Tightening torque 0.8 N. m Applicable cri m p-on terminal

Examples: V1.25-M3 from J.S.T. Mfg. Co. Ltd. RAV1.25-3.5 from Nippon Tanshi Co., Ltd.

M3.5

8.6mm

0.5 SQ from Hitachi

Terminating resistor

(built-in)

Set the terminati ng res istor selector swtich to a 4-wire system.

SHIELD

SDA

SDB

RDA

RDB

(SD A)

(SD B)

(RD A)

(RD B)

(SG)

SHIELD

IM 34M6H21-01E 2nd Edition : Aug, 2001-00

Remote equipment

Terminating resistor

 Two-Wire System

3-5

Terminating resistor

F3RS41-0N module’s

port terminals

SDA

SDB

(built-in)

Set the terminati ng res istor selector swtich to a 2-wire system.

RDA

RDB

SHIELD

 Notes on Wiri ng

(1) Ground the cable for the twisted pair at two ends (by connecting it to the SHIELD or

the FG terminal). The SHIELD terminal on the F2RS41-0N is connected to the FG terminal internally.

(2) The F3RS41-0N has a built-in terminating resistor (220:), which can be set to a 4-

wire system or a 2-wire system using the terminating resistor selector switch.

(3) For conforming equipment incorporating the F3RS41-0N to CE Marking, use a

shielded cable. Remove the cable cover to expose the wire, ground and secure the wire with a FG clamp.

Shielded cable

Screw the clamp to the metal plate of the panel enclosure to ground it.

Remove the cover and secure with an FG clamp.

A

B

SG

F3RS41-0N



SHIELD

3.3 Att aching and Detaching Modules

CAUTION

Even if the F3RS41-0N module is properly connected, error such as a flashing LED may still occur because the signal polarities (represented as A/B) ar e r eversed with respect to that of the remote equipment. In such case, change the connection accordingly.

See Section 2.3, "Attaching and Detaching Modules".

IM 34M6H21-01E 2nd Edition : Aug, 2001-00

Blank Page

4. Using the Communication Module

4.1 Basic Communications

 Declar ing Use of the Module

Use the ASSIGN statement to declare use of the module. ASSIGN module ID = S(, module ID=S, …) Module ID: RS22…F3RS22–0N RS41…F3RS41–0N S: Slot number (Example) ASSIGN RS22=5, RS42=6

An example is illustrated for F3RS22–0N in the sample program hereaft er. F3RS41–0N can also be declared similarly since the difference lies only in the module ID of the ASSIGN statement.

4-1

 Resetting the Module

The communication module can be reset using the RESET statement. Always reset the buffer after setting the communication conditions.

Table 4.1 RESET Statement

Module Reset

Port Reset RESET 5, 1 9 9 Buffer Reset RESET 5, 1, 1 9 u

Note: This example uses s lot num ber 5 and port num ber 1. For the F3RS41–0N module, which has only one port, Module Reset and t he Port Reset produc e t he s ame result.

Example (note)

RESET 5

Communication

buffer

9 9

 Setting Communi cation Conditions

The communication conditions such as data transfer rate and parity must be set using software. Values for the communication conditions are written to and read from registers in the module using CONTROL/STATUS statement s.

CONTROL S

*: F3RS41-0N module does not support port 2.

STATUS S,P,R;Para

,P,R;Para

Setting value Register number

Port number (1 or 2 Slot number

Storage variable (integer)

Communication

conditions

)

Remarks

The communication conditions for the module reverts to default . The communication conditions for Port 1 reverts to default. The communication condition remains unchanged.

IM 34M6H21-01E 2nd Edition : Aug, 2001-00

(Example)

When using slot number 5, port 2 at 9600bps, odd parity with 2 stop bits,

10 ASSIGN RS22=5

20 RESET 5,2 : !Port Reset

30 CONTROL 5,2,14;7 : !9600 bps

40 CONTROL 5,2,13;1 : !parity Odd

50 CONTROL 5,2,12;2 : !2 Stop bits

60 RESET 5,2,1 : !Buffer Reset

The main registers for setting the communication conditions are shown in Table 4.2. See Table 4.7 in Section 4.4 for a list of all the registers.

Table 4.2 List of Main Registers for Setting Communication Conditions

Data Position

Number

11 S/C Character length

12 S/C Stop bit length

13 S/C Parity

14 S/C

S/C: status/control register

Type of

Contents Default Value

Data transfer rate (bps)

0: 7 bits 1: 8 bits Others: 8 bits 0: 1 bit 1: 1.5 bits 2: 2 bits Others: 2 bits 0: none 1: odd 2: even Others: even 0: 75 1: 150 2: 300 3: 600 4: 1200 5: 2400 6: 4800 7: 9600 8: 19200 others: 19200

4-2

 Output

Use the OUTPUT statement to send t ext .

OUTPUT S,P;output data

Numeric values or variables, or character strings or c haracter string variables. Enclose numeric values or character strings within doubl e quotes (“).

(Example)

To send the character string “ABCDE” from slot 5, port 2, OUTPUT 5, 2; “ABCDE” The ending characters CR-LF (default value) are added and output on the line as

shown below.

A B C D E

CR LF

IM 34M6H21-01E 2nd Edition : Aug, 2001-00

 Input

4-3

Use the ENTER statement to retriev e received text. The ENTER statement extracts from the rotary buffer text. The text is delineated using

the ending character, character-to-character time out or the number of characters received.

ENTER S,P;input variables

(Example)

To receive text from slot 5, port 2, ENTER 5, 2; RCVDT$ The receive text from the rotary buffer is stored in the input variable RCVDT$ (string

variable).

S 1 2 3 4

In the above example, the receive variable RCVDT$ is set as follows.

RCVDT$=”S1234”+CHR$($0D)+CHR$($0A)

Although the ENTER statement can be used alone for receiving, the system will remain in wait state until receive complete s if the receive text is not in the rotary buffer. Hence, it is recommended that you use the ENTER statement toget her w it h t he ON INT statement so that control transfers to the ENTER statement only when receive text has entered the rotary buffer.

Variables or array variables of numeric type or character stri ng type.

CR LF

IM 34M6H21-01E 2nd Edition : Aug, 2001-00

4-4

4.2 Transmission Text and Format Specifications

 Data Output

Data output is performed with the OUTPUT statement. The OUTPUT statement can be used to specify t he out put format, as well as whether a

terminator is to be appended and code conversion to be performed before output.

Table 4.3 Format Specification using the OUTPUT statement

Type Statement Terminator Code Conversion

I OUTPUT S, P, ~

II OUTPUT S, P, ~

III OUTPUT S, P NOFORMAT; ~ Not appended No (YM – BASIC/FA internal

S: Slot number P: Port number

OUTPUT S P USING “~”, ~

OUTPUT S P USING “#,~”, ~

z Type I

The output data undergoes code conversion, the terminator is appended aut omatically and the data is output to the line. I f t here is an image specification, it follow s the image specification. For details on the format of the image specification, refer to the IMAGE statement in the user’s manual “BASIC CPU Modules and YM - BASI C/F A Programming Language” (IM34M6Q22-01E). The terminator can be specified as any character st ring of two or less characters. The default is CR-LF.

BASIC program Data on the line

10 ASSIGN RS22=5

20 A$=”ABCD”: B=100

30 OUTPUT 5,2;A$;B

40 OUTPUT 5,2 USING”3A,MDDZ.Z”;A$;B

Note: The above real variable B is converted to a c harac t er s t ring bef ore out put .

A B C D

A B C

appended automatically Not appended (appended by user)

Yes Yes

code)

1 0 0

CR LF

z Type II

The output data undergoes code conversion before output. No terminator is appended. If a terminator is required, the user has to ensure that it is appended during output.

BASIC program

10 ASSIGN RS22=5

20 A$=”ABCD”: B=100

30 TERM$=CHR$($0D)

40 OUTPUT 5,2;A$;B;TERM$;

50 OUTPUT 5,2 USING”#,3A,MDDZ.Z,2A”;A$;B;TERM$

Data on the line

A B C D

A B C

1 0 0

IM 34M6H21-01E 2nd Edition : Aug, 2001-00

z Type III

The output data is output as internal code. No terminator is appended. Code conversion is ignored, even if specified.

BASIC program Data on the line

10 ASSIGN RS22=5

20 A$=”ABCD”: B=100

30 OUTPUT 5,2 NOFORMAT;A$;B

 Data Input

Data input is executed with the ENTER statement. The ENTER statement can be used to specify the input format, as w ell as w hether a

terminator is to be removed and code conversion to be performed after input.

Table 4.4 Format Specification using the ENTER Statement

Type Statement Terminator

I ENTER S, P, ~

ENTER S P USING “~”, ~

II ENTER S, P, ~

ENTER S P USING “#,~”, ~

III ENTER S, P NOFORMAT; ~ No change No

S: Slot number P: Port number

A B C D

No change Yes Removed

automatically

4-5

Numeric data (internal c ode)

Code Conversion

Yes

z Type I

The data on the line undergoes code conversion and is stored into the input variable with the terminator attached as is. I f t here is an image specification, it follows the image specification. For details on the format of the image specification, refer to the IMAGE statement in the user’s manual “BASIC CPU Modules and YM - BASI C/F A Programming Language” (IM34M6Q22-01E).

(Example)

This example shows receiving of the following data on the line from port 2 of slot 5 where the terminator is CR-LF.

Data on the line

BASIC program

1000 ENTER 5,2;A$

1010 ENTER 5,2 USING 1020;B$;c;D$

A B C D

1020 IMAGE 4A,6N,2A

A B C D 1 0

The value of each variables is as shown below.

A$ = ”ABCD” + CHR$($0D) + CHR$($0A)

B$ = ABCD”

C = 100

D$= CHR$($0D) + CHR$($0A)



0 .

z Type II

The data on the line undergoes code conversion, the terminator (if present) is removed and the data is stored in the input variable. If there is an image specification, it follows the image specification For details on the format of the image specification, refer to the IMAGE statement in the user’s manual “BASIC CPU Modules and YM-BASIC/FA Programming Language” (IM34M6Q22-01E).

IM 34M6H21-01E 2nd Edition : Aug, 2001-00

(Example)

This example shows receiving of the following line data from port 2 of slot 5 when the terminator is CR-LF.

BASIC program Data on the line

1010 ENTER 5,2 FORMAT;A$

1020 ENTER 5,2 FUSING 1030;B$;C

1030 IMAGE 4A,6N

A B C

A B C D

1 0 0

The value of each variable is as shown below.

A$=“ABCD”

B$=“ABCD”

C=100

z Type III

The data on the line does not undergo code conversion and is stored in the input variable unchanged. The terminator, even if present, is not removed.

(Example)

The example shows receiving of the following line data from port 2 of slot 5.

BASIC program Data on the line

10 DEFINT K

1010 ENTER 5,2 NOFORMAT;A$

1020 ENTER 5,2 NOFORMAT;K

A B C D

Binary data ($0001)

The value of each variable is as shown below.

A$=“ABCD”+CHR$($0D)+CHR$($0A)

K=1

(no terminator)

0 D

4-6

CR LF

IM 34M6H21-01E 2nd Edition : Aug, 2001-00

4.3 Efficient Communication

 Interrupt Input

Interrupt Input performs input from the communication line and after receiving of the transmission text is completed, an interrupt is sent t o t he BASIC program. When Interrupt Input is used, the BASI C pr ogr am can continue w it h ot her pr ocessing even whilst the actual communication process is executed by the module processor. The data is accepted after receiving has been completed, hence improving performance.

The following two statements are used for Interrupt Input .

(1) ON INT

This statement declares an interrupt and specifies the branch points for a port.

ON INT S,P CALL Subprogram name

GOSUB

GOTO

Use the OFF INT statement t o cancel an O N INT statement declaration.

OFF INT S,P

Label Line no.

4-7

(2) ENABLE INTR

To pass the text saved in the buffer within the module to a BASIC program, the I/O interrupt request mask within the module must be switched to an unmasked state.

By executing this statement, when an interrupt to BASIC occurs, t he r eceived text saved in the buffer can be passed to BASIC using ENTER.

Since the corresponding I/O interrupt request mask switches to the masked state for every port reset and interrupt branching, set t he unmasked stat e again using ENABLE INTR.

ENABLE INTR S,P;”x

1 x2 x3

S: slot number P: port number

and X3 may be omitted. They are zero when omitted.

1: Branching of interrupt using ON INT stat ement when receiving completes.

0: Interrupt is disabled. The received text is saved in the buffer. 1: Branching of interrupt using ON INT stat ement when error occurs during receiving. The received

0: Interrupt is disabled. The received text containing the error is dis carded. 1: Branching of interrupt using ON INT stat ement when a break is received. The received text

0: Interrupt is disabled. The received text containi ng the break is discarded.

text containing the error is discarded.

containing the break is disc arded.

”

Break received Error during receiving

Receiving completed

IM 34M6H21-01E 2nd Edition : Aug, 2001-00

4-8

(Example)

10 DEFINT I

20 ASSIGN RS22=5

50 ON INT 5,2 GOSUB INT@ … Specify interrupt destination

70 ENABLE INTR 5,2;”111” … Remove interrupt mask

Main program

100 INT@

110 STATUS 5,2,2;I

120 IF I = 0 THEN Interrupt handling

130 ENTER 5,2,;REC$

140 ELSE

150 PRINT “RECEIVE ERROR”

160 ENDIF

170 ENABLE INTR 5,2;”111”

180 RETURN

Line 70 enables interrupts for all reasons. Once an interrupt is raised, any further interrupt from the corresponding port will be automatically disabled. Therefore, you need to re-enable the interrupt before you exit this subroutine.

If multiple interrupt reasons are enabled (unmasked), use the STATUS statement t o read the interrupt request status (register number 2), to det ermine whether t he ENTER statement can be executed. Executing the ENTER st at ement for any int errupt other than the End of the Receiving interrupt w ill cause an er r or since the receive text would already have been discarded.

 TRANSFER

Proceeding Type

Module accessing using ENTER/OUTPUT is a complete return type of access where the BASIC program is in a wait state from the beginning of t he oper at ion to its completion.

Although this waiting can be avoided using ON INT/ENABLE I NTR for the ENTER statement (during input), for t he OUTPUT statement (during out put ) , the BASIC program has to wait until the operation completes (see Figure 4.1). In such a situation, it is convenient to use the Proceeding type of access with TRANSFER/ON EOT.

In the Proceeding type of module access, the BASIC progr am merely starts the module communication whereas the processor within the card handles all subsequent inputoutput processing (see Figure 4.2). This type of access is part icularly effective when the transmission text is long and the data transfer rate is low. Parallel input-output operation with other I/O cards is also possible.

Note the following when accessing using TRANSFER.

- Access to the corresponding port For a port started by TRANSFER, other accesses with the exception of HALT

- Error during execution of TRANSFER Errors during the execution of TRANSFER can be discovered by reading the status

(TRANSFER, OUTPUT, CONTROL, etc) are disallowed (causes an error) until the operation has completed. In the user program, manage the port with flags and check whether the port can be used during TRANSFER initiation. Completion of TRANSFER is reported by an ON EOT interrupt .

registers (register number 04) of the corresponding port during ON EOT branching. The set values are similar to the BASIC det ailed er r or codes ( 82- XX). As there is

IM 34M6H21-01E 2nd Edition : Aug, 2001-00

4-9

no ON ERROR branching, check the status register in the program.

BASIC program in WAIT state

Figure 4.1 Time Chart for Complete Return Type of Access

Figure 4.2 Time Chart for Proceeding Type of Access

Time

CPU Free

CPU Busy

OUTPUT ENTER

CPU Busy

ON EOT

TRANSFER FROM TRANSFER INTO

Transmission destination

Data

Transmission destination

&CVC

BASIC program in WAIT st ate

Time

CPU Free

Time

CPU Free

ON EOT

CPU Busy

Transmission destination

 

Data

Transmission destination



& C V C 

Time until data

arrives from remote equipment



Time until data

arrives from remote equipment

z TRANSFER Procedure

The program procedure for input and output using TRANSFER is explained below. In both cases, input/output buffers and input/out put variables are required in the user area.

- Output Procedure Data is output to the input/output buffer within the user area. Then, TRANSFER is

started. Common variables cannot be used in the input/output buffer.

10 DEFINT I

20 DIM BUFF$256,A$256

30 A$=“ABCDE”

40 ASSIGN RS22=5

50 OUTPUT BUFF$;A$ … Output data to buffer

60 ON EOT 5,2 GOSUB RSEOT@ … Specify interrupt destination

70 TRANSFER 5,2FORMAT FROM BUFF$ … Initiate TRANSFER

Other processing

1000 RSEOT@ STATUS 5,2,4;IST

1010 IF IST<>0 THEN

1020 PRINT“TRANSFER ERROR”

1030 ELSE Interrupt processing for end of TRANSFER

1040 PRINT“TRANSFER END”

1050 ENDIF

1060 RETURN

IM 34M6H21-01E 2nd Edition : Aug, 2001-00

4-10

- Input Procedure

Although interrupt branching using ON INT can be used in almost all situations,

TRANSFER is useful when you need to perform input time monitoring (SET TIMEOUT/ON TIMEOUT) processing. Normally, interrupt input using ON INT is used.

Data is output into the input/output buffer first and then read using ENTER.

Common variables cannot be used in the input/output buffer.

10 DEFINT I

20 DIM BUFF$ 256,A$256

30 ASSIGN RS22=5

40 ON EOT 5,2 GOSUB RSEOT@ … Specify interrupt destination

50 TRANSFER 5,2 INTO BUFF$ … Initiate TRANSFER

Other processing

1000 RSEOT@ STATUS 5,2,4;IST

1010 IF IST<>0 THEN

1020 PRINT “TRANSFER ERROR!”

1030 ELSE Interrupt processing for end of

TRANSFER

1040 ENTER BUFF$;A$

1050 PRINT A$

1060 ENDIF

1070 RETURN

z Format Specification

When specifying the format such as the addition of terminator in a TRANSFER statement, match it with the format specification of t he ENTER/OUTPUT st atement used for buffer input/output.

For details on the operation of each individual format type, see Section 4.2.

Table 4.6 Format Specification on Output

Type Format Specification of OUTPUT

I OUTPUT BUFF$

OUTPUT BUFF$ USING “~“; ~

II OUTPUT BUFF$

OUTPUT BUFF$ USING “#, ~“; ~

III OUTPUT BUFF$

NOFORMAT; ~

S: slot number P: port number BUFF$: name of I/O buffer

Table 4.6 Format Specification on Input

Type For mat Specification of ENTER

I ENTER BUFF$; A$

ENTER BUFF$ USING “~“; A$

II ENTER BUFF$ FORMAT; A$

ENTER BUFF$ USING “~“; A$

III ENTER BUFF$ NOFORMAT; A$ TRANSFER S, P NOFORMAT INTO

S: slot number P: port number BUFF$: name of I/O buffer

Format Specification of

TRANSFER

TRANSFER S, P FORMAT FROM BUFF$ TRANSFER S, P FROM BUFF$ Not appended

TRANSFER S, P NOFORMAT FROM BUFF$

Format Specification of

TRANSFER

TRANSFER S, P INTO BUFF$ Appended TRANSFER S, P FORMAT INTO

BUFF$

Terminator

Appended automatically

(appended by user) Not appended No (YM.

Terminator

automatically Not appended (appended by user) Not appended No (YM.

Code

Conversion

Yes Yes

BASIC/FA internal code)

Code

conversion

Yes Yes

BASIC/FA internal code)

IM 34M6H21-01E 2nd Edition : Aug, 2001-00

4.4 Using Registers

F3RS22-0N and F3RS41-0N have many registers for handling various aspects of transmission. This section describes the use of these registers.

 List of Registers

4-11

Number

17* S/C DR check

18* S/C CD check

19* S/C

Type

01 S Input wait s tat us

02 S Int errupt request status

03 S Input data s tatus

04 S

05 S

06 S/C Transmission code

07 S/C

11 S/C Character length

12 S/C Length of stop bits

13 S/C Parity

14 S/C Data transfer rate (bps)

15 S/C

16 S/C

Output processing data status

Input processing data status

Character-to-character receiving interval timeout . processing

F3RS22-0N RS control

F3RS41-0N

F3RS22-0N RS control

F3RS41-0N

Transmission enabled monitoring time (DR control monitoring)

Send/receive control

Contents Default Value

0 : no others : waiting for input 0 : receive terminated normally 1 : error during receiving 2 : break received Bit 5 : framing error Bit 4 : overrun error Bit 3 : parity error Bit 2 : i nternal buffer overflow Bit 1 : character-to-character recei vi ng i nterval timeout Bit 0 : break received A bit is “1” when the corresponding error occurs. Output status for OUTPUT/TRANSFER statement =0 : sending terminated normally

0 : sending terminated abnormally

INPUT status for ENTER/TRANSFE R s tat ement =0 : receiving terminated normall y

0 : receiving terminated abnormally 0 : internal c ode 1 : ASCII 2 : JIS 8 unit 0 : receive terminated normally 1 : error during receiving 0

0 : 7 bits 1 : 8 bits Others : 8 bits

0 : 1 bit 1 : 1.5 bits 2 : 2 bits Others : 2 bits

0 : none 1 : odd 2 : even Others : even

0 : 75 1 : 150 2 : 300 3 : 600 4 : 1200 5 : 2400 6 : 4800 7 : 9600 8 : 19200 others : 19200

0 : always ON 1 : ON only when sending

See Section 4.6  Setting Registers

0 : ER=OFF 1 : ER=ON

See Section 4.6  Setting Registers

0 : transmits regardless of the s tat e of DR

1 : transmits only when DR is ON 0 : transmits regardless of the s tat e of CD 1 : transmits only when CD is OFF 0 : no time-monitoring 1 to 32760 (ms) 0



0 0

IM 34M6H21-01E 2nd Edition : Aug, 2001-00

second ending

Number

101 C Send break 1 : start break sending

S: status register, C: control register, S/C: status /control regis ter

Type

20 S/C

21 S/C

22 S/C

23 S/C 24 S/C

25 S/C X

26 S/C X

Time for sending break signal

Starting character for receive text

Ending character (terminator)

Number of receive characters

Monitored character-tocharacter time interval

ON/XOFF

control

characters

Contents Default Value

1 to 32760 (ms)

All zeroes when no starting character i s specified

15 8 7 0

first ending

character

First ending character = 0 when there is only one character

All zeroes when no ending character is specified

1 to 1024 (number of characters on the line)

0 to 32760 (ms) (no character-to-character monitoring when value is 0)

0 : No control 1 : Receiving end onl y 2 : Transmitting end onl y 3 : Both transmitting end and receiving end

8 7

XON X

*: Not available for F3RS41-0N

Starting

character

OFF

4-12

400

$0A

$0D

LF )

( CR

1024

$11

(DC1

1500

$13

DC3)



 Format of Received Text

The communications module detects the end of the received text and recognizes the text in any of the following ways.

z Terminator received

The module identifies the end of text when the terminator (end-of-text character) is received. The default value is CR-LF.

(Example) When the terminator is set to EXT ($03)

10 ASSIGN RS22=5

20 CONTROL 5,2,22;$0003 :!Set terminator.

30 RESET 5,2,1 :!Reset buffer.

A B C E F

Text 1

Received data

Text 2

ETX

G ETX

IM 34M6H21-01E 2nd Edition : Aug, 2001-00

z Specification of number of receive bytes

The end of text is assumed when the specified number of bytes (1 to 1024) is received. When the starting character for receive text is specified, the counting of the received

bytes starts from that character. (Example 1) When the number of received bytes is set to 4 bytes:

10 ASSIGN RS22=5

20 CONTROL 5,2,23;4 :!Specify number of received bytes.

30 RESET 5,2,1 :!Reset buffer.

Received data

A C F G H E

Text 1

Text 2

(Example 2) When the starting character is set to STX ($02), the number of received bytes is set to 6 and the terminator is set to ETX ($03):

10 ASSIGN RS22=5

20 CONTROL 5,2,21;$0002 :!Specify starting character for received text.

30 CONTROL 5,2,23;6 :!Specify number of received bytes.

40 CONTROL 5,2,22; $0003 :!Set the terminator.

50 RESET 5,2,1 :!Reset buffer.

Starting character for

receive text

A B R N D

Discarded

P Q U

STX

Text 1

(6 bytes of received

characters)

If data is sent during thi s period, They are not received as text.

Starting character for

receive text

E S

STX

(Terminator received)

Terminator

(End of Text)

ETX

Text 2



4-13

z Character-to-character receiving interval timer

The character-to-character receiving interval timer monitors the character-to-character receiving time interval. When the next character is not received within the specified time, end of text is assumed. This mode is useful for binary communications and text with no terminator.

(Example) Received data (no terminator), character-to-character timer is 1 second

10 ASSIGN RS22=5

20 CONTROL 5,2,22;$0000 :!Set the terminator (no terminator).

30 CONTROL 5,2,7;0 :!Specify receive character-to-character

timeout processing

40 CONTROL 5,2,24;1000 :!Specify monitored character-to-character

receiving time interval.

50 RESET 5,2,1 :!Reset buffer.

Received data (with no terminator)

Time specified

1000 ms Not considered a receive error even if timeout occurs

IM 34M6H21-01E 2nd Edition : Aug, 2001-00

 XON/X

Control

OFF

This feature prevents overflow in the communication buffer through the exchange of special characters. This feature only applies in full duplex communications.

4-14

Table 4.8 XON/X

Classification Operation

Receiving end When the space in the input buffer falls below one quarter, transmit X

Transmitting end

The system will switch to the X port or buffer is reset. Any single character can be set as the X (default is DC1/DC3).

(Example) When using X

10 ASSIGN RS22=5

20 CONTROL 5,2,25;3 :!Specify XON/XOFF control.

30 RESET 5,2,1 :!Reset buffer

However, XON/X characters are not sent during text transmission.

 Break Signal

Operation

OFF

When the space i n the input buffer rises above half, transmi t X When data is received in the X character is retransmitted. The character-to-character timer is inactive in

state and becomes active once XON is received.

the X

OFF

After the specified X characters. The received X

ON/XOFF

character is received, sending is stopped within 2

OFF

character is not passed as receive text to BASIC.

OFF

state when power is switched on or when t he module,

control for both sending and receiving characters

state after X

OFF

transmission, the X

OFF

ON.

ON/XOFF

OFF

character .

control is only available in character communications. The XON/X

OFF

The break signal is a special signal that sends data containing a type of framing error (all bits are “1”). This communication module handles break signal on both sending and receiving.

z Sending a break

(example) Send the break signal after a 300 ms interval

1000 CONTROL 5,2,20;300 :!Specify send time for break signal

1010 CONTROL 5,2,101;1 :!Specify to send a break

z Receiving a break

Receiving a break signal causes an error (82-D4: receive error). However, it can also be identified using an interrupt input. For details, see Section 4.3

IM 34M6H21-01E 2nd Edition : Aug, 2001-00

4.5 Special Communications

 Long Text

Be careful when handling long text (exceeding 512 bytes). All the following conditions must be satisfied during sending.

- Data size transferred from a BASIC program to the communications driver is less than 1 KB (including terminators)

- Line data after code conversion is less than 1 KB (including terminators)

(Example 1) Simple string variable

10 DIM A$512,B$500,

100 OUTPUT 5,2;A$;B$

(Example 2) An entire array

10 OPTION BASE1

20 DIM BUFF$ 500(2)

100 OUTPUT 5,2;BUFF$(*)

Similarly, during receiving, all the following condit ions have to be satisfied.

- Line text is less than 1 KB (including terminators)

- Data size transferred t o the input variable of the BASIC program is less than 1 KB (including terminators)

In the YM-BASI C/ FA language specifications, a string variable has a maximum size of 512 bytes. Therefore, the input is performed by specify ing 2 or more variables. Not e that if a 2-byte code (Katakana, Kanji, etc.) sp ans a variable boundary, the character cannot be read.

4-15

(Example 1) Simple string variable

10 DIM A$512,B$512

20 ASSIGN RS22=5

30 ENTER 5,2;A$,B$

(Example 2) An entire array

10 OPTION BASE 1

20 DIM BUFF$512(2)

30 ASSIGN RS22=5

40 ENTER 5,2;BUFF$(*)

 Binary Transmission

Binary transmission sends binary bit patterns instead of character codes on t he line. It is used primarily for sending numeric data. It can be sent in the NOFORMAT specification (Type III).

It can be received in the NOFORMAT specification (Type III) without any terminator and using the character-to-character interval timer.

Under normal circumstances, use fixed text length transmission. In the case of variable-length text, the text length can be det ermined with t he I O SI ZE function. X

ON/XOFF

control is not available during binary transmission.

IM 34M6H21-01E 2nd Edition : Aug, 2001-00

 Handling Null Codes

In the YM-BASI C language specifications, the BASIC interpreter treats a null code ($00) as a character string delimiter. If there is a null code embedded in a character string, the null code and all subsequent characters are ignored. This is also the case during binary transmission.

For sending and receiving with null codes, integer arrays can be used as input/out put variables. However, note that access will be on a word boundary (2-bytes unit) in this case.

A$="X"+CHR($00)+"Y"

is the same as

A$="X"+"Y"

To send null codes, use the following methods.

(1) Using an integer array as the output variable

Using the NOFORMAT specification, send word-bounded data as given below.

10 OPTION BASE 1

20 DEFINT K

30 DIM K(2)



100 K(1)=ASC("X")

110 K(2)=0

120 OUTPUT slot,port NOFORMAT;K(1)*256+K(2)

Note that, in the above example, when a character string with an odd number of

characters is sent, a null character is appended to the end so that there is an ev en number of characters in the string.

(2) Specify ing data in by t es

Send data in bytes using image setting as shown below.

OUTPUT slot,port USING "#,B";K(*)

This method sends all data in array K(*) defined in the Dimension (DIM) statement.  To send v ariable size data, use a program as shown below.

200 II=5

210 FOR I=1 To II

220 OUTPUT slot,port USING "#,B";K(I)

230 NEXT I

This method sends only the required characters, taking into consideration the character-to-character timeout.

4-16

IM 34M6H21-01E 2nd Edition : Aug, 2001-00

 Inserting Binary Data into Text

One example is the entry of BCC (Block Check Character) at the end of the text. This can be done conveniently using the IMAGE B, W specifications (Type II).

IMAGE B, W specification is only effective in the following situation and cannot be used in other situations. It has to be processed as binary tr ansmission.

- Fixed length transmission text

- Character code is YM - BASI C/FA internal code

- X

ON/XOFF

control is not used

4-17

IM 34M6H21-01E 2nd Edition : Aug, 2001-00

4.6 Multi-point Connection

Besides point-to-point (1:1) connections, multi-point (n : n) connections are also supported in F3RS41-0N.

 External Connection

F3RS41-0N conforms to the RS-422-A and RS-485 standards. The number of possible connections for the respective specifications are as shown in Table 4.9.

Table 4.9 Number of Connections Allowed

1: n n: n

RS-422-A 1 : 10

RS-485 1 : 32 32 : 32

Two t ypes of external connection mode are supported, namely, 4-wire and 2-wire. The 4-wire connection is 1: n where there are n substations for 1 master station. The 2-wire connection is n : n which includes 1 : n. Figure 4.3 shows the respective connection examples. For the 4-wire connection, the send/receive signal wires from the master station t o t he

substations have to be crossed. For the 2-wire connection, send/receive signals of similar polarities are connected in the

terminal block in this module. Only 2 wires are laid externally.

Four-wire multipoints

(Master station)

RS42-0N/

F3RS41-ON port terminal

SD A

SD B

RD A

RD B

S G

*1 FG

(SHIELD)

(SD A)

(SD B)

(RD A)

(RD B)

(SG)

(Substation 1)

Remote equipment

SD A

SD B

RD A

RD B

S G

F G

(SD A)

(SD B)

(RD A)

(RD B)

(SG)

(Substation 2)

Remote equipment

SDSDB

RD A

RD B

S G

F G

4-18

(Substation n)

Remote equipment

(SD A)

(SD B)

(RD A)

(RD B)

(SG)

SDSDB

RD A

RD B

S G

F G

Two-wire multipoints

(Station 1) RS42-0N/

F3RS41-0N port terminal

SD A

SD B

RD A

RD B

S G

*1 FG

(SHIELD)

(SG)

(Station 2)

Remote equipment

(A)

(B)

S G

F G

(A)

(B)

(SG)

(Station 3)

Remote equipment

S G

F G

Remote equipment

(A)

(B)

(SG)

*1: Connect t he s hielded c ables t o both ends of the ground terminals of FG or SHIELD terminals. *2: For more inf orm at ion on t erm inat ing res is t ors , see Section 4.6, “



Setting Terminating Resistors”

*3: For conf orm ing equipm ent inc orporat ing t he F3RS41-0N to CE Marking, us e s hielded c ables.

For more information, see Section 3.2, “External Wiring”.

Figure 4.3 Multipoint Interconnections

IM 34M6H21-01E 2nd Edition : Aug, 2001-00

(Station n)

S G

F G

 Setting Registers

Depending on the configuration of the external connection, 3 types of modes can be used in this module, namely 4-wire master station, 4-wire substat ion and 2-wire. If the register settings corresponding to the three modes are not performed, normal communication is not possible.

The register settings corresponding to the different modes are performed according to the details in Table 4.10 using registers 15, 16.

Table 4.10 Setting Registers

0 Setting not allowed 2-wire 1 4-wire master

0 1

station (default)

 Setting of ter m i nati ng Resi stors

Terminating resistors in multi-point connections (including point-to-point connections) have to be set at stations located on t he respect iv e communication routes.

In the 4-wire system, set the terminating resistor at t he master station and substation n in Figure 4.3.

For intermediate substation 1 to substation (n-1), remove the t erminating resist or. Otherwise, normal communications may not be possible.

In the case of F3RS41-0N, the terminating resistor is built-in and is controlled by a switch. Set the switch to “4-WIRE” for terminal stations and “OFF” for the rest (see Figure 4.5).

In the 2-wire system, set the terminating resistor at station 1 and station n as in Figure

4.3. Ensure that the terminating resistor is removed from station 2 t o station (n-1). In the case of F3RS41-0N, the terminating resistor is built-in. Set t he swit ch to “2-WIRE”

for terminal stations and “OFF” for the rest (see Figure 4.5).

4-19

4-wire substation

RDY

RS41-0N

TERMINATOR

2- 4-WIRE

OFF

SD A

SD B

RD A

RD B

SHIELD

RS422

TERMINATOR

2- 4-WIRE

OFF

Figure 4.5 Setting Terminator Switch (For F3RS41-0N Module)

IM 34M6H21-01E 2nd Edition : Aug, 2001-00

Device

 Protocol Processing

When using multi-point connections on the F3RS41-0N, protocol (communication control procedure) is essential to prevent line conflicts along the transmission route.

Although FA-M3 provides t he physical int erfaces, it does not support protocol processing in the system. Therefore, pr otocol control must be described using a BASIC program. Normally, the polling selection method is used.



FA-M3

4-20

Application

Protocol

Physical interface

Range over which application program is used



Remote equipment

- When transmitting from F3RS41-0N to the remote equipment, the equipment number must be set to identify the destination. The equipment number refers to the identification number assigned to the remote equipment. The remote equipment must be identified in advance according to its unique identification number by some means.

- The text formats containing the equipment number vary according to t he individual protocols.



The following example illustrates communication between F3RS41-0N (master station) and 2 remote equipment (substations).

F3RS41-0N polls the 2 remote equipment for any data to be sent. If there is data to be sent from the remote equipment, the data is read.

Here, the command for reading the status from the remote equipment is “DS” while the command for reading the data from the remote equipment is “RD”. An example of the text format is shown below.

z Text Format

This text format example uses control characters. Control characters are optional.

SOH:start of header

STX:start of text

ETX:End of text

z When F3RS41-0N reads the status of the remote equipment

(command: DS)



F3RS41-0N

- “Status” refers to contents sent from the remote equipment to F3RS41-0N.

“Status” can assume the values of “receive completed”, “receive error” and “send

data exists”. “Send data exists” refers to the flag which indicates whether there is any data to be sent from the remote equipment to F3RS41-0N.

S O

Device

Command

No.

S T X

Remote equipment

E T X

S O H

Command

no.

S T X

DS Status

T X

IM 34M6H21-01E 2nd Edition : Aug, 2001-00

4-21

z When F3RS41-0N reads data from the remote equipment

(command: RD)



F3RS41- 0N

F3RS41-0N

- “DATA” refers to contents sent from the remote equipment to F3RS41-0N.

z Timing Chart

Device

S O H

Command

T X

The program is as shown below

S O H

Command

No.

Device

S T X

T X

Remote equipment

S O H

No.

Device

RS DATA

E T X

Command

E T X

Remote equipment 1

Status

O H

T X

E T X

T X

S O H

Status E T

S O H

E T X

Device

S T X

RD DATA

Remote equipment

Command

10 DEFINE A-Z

20 SLOT=5:PORT=1

30 ASSIGN RS42=SLOT

40 CONTROL SLOT,PORT,14;7 :! 9600bps

50 CONTROL SLOT,PORT,22;$003 :! Terminator = ”ETX”

60 RESET SLOT,PORT,1 :! Reset buffer

70 ON INT SLOT,PORT GOSUB ENTSTS@ :! Declare interrupt and set branch

points

80 ENABLE INTR SLOT,PORT;“111” :! Enable interrupt

90 MNUMBER$=“01” :! Device number

100 COMMAND$=“DS” :! “DS”; Read Status command

110 GOSUB SND@

120 WAIT

(to be continued on the next page)

E T X

IM 34M6H21-01E 2nd Edition : Aug, 2001-00

4-22

1000 ENTSTS@ :! Interrupt handling subroutine

1010 STATUS SLOT,PORT,2;IREC :! Interrupt request status

1020 IF IREC=0THEN :! Normal receive?

1030 GOTO ENTDAT@ :! Goto Receive Data

1040 ELSE

1050 DP“Error or break received.”

1060 GOTO RTN@

1070 ENDIF

1080 ENTDAT@

1090 ENTER SLOT,PORT;RCVDAT$

1100 RCVMNUM$=MID$(RCVDAT$,3,2) :! Extract device no.

1110 IF RCVMNUM$ <> MNUMBER$ THEN GOTO RTN@ :! Do not process error device no.

1120 RCVCMD$= MID$(RCVDAT$,7,2) :! Extract command

1130 IF RCVCMD$=“DS”THEN

1140 RCVSTS$=MID$(RCVDAT$,9,1) :! Extract status

1150 RST=VAL(RCVST$) :! Check “send data exists” flag

1160 RST=BINAND(RST,$04) :!

1170 IF RST=4 THEN :!

1180 COMMAND$=“RD” :! “RD”; Read Device Data command

1190 GOSUB SND@

1200 ENDIF

1210 ENDIF

1220 RTN@

1230 ENABLE INTR SLOT,PORT;“111”SND@

1240 RETURN

2000 SND@ : ! Send routine

2010 SNDDAT$=CHR$(01)+MNUMBER$+CHR$(02)+COMMAND$:! Create text ”SOH”

+ ”Device no.” + ”STX” + ”Command”

2020 OUTPUT SLOT,PORT;SNDDAT$

2030 RETURN

3000 END

IM 34M6H21-01E 2nd Edition : Aug, 2001-00

5. BASIC Statements and Error Codes

5.1 BASIC Statements

Table 5.1 BASIC Statements

BASIC Statement Functions

ENTER S,P Data input OUTPUT S,P Data output TRANSFER S,P Start data input / output ON EOT S,P Enable program branching on completion of data transf er OFF EOT S,P Disable program branching on completion of data transfer

ENABLE INTR S,P Mask / unmas k receive interrupt for all ports ON INT S,P Enable program branching for receive interrupt

OFF INT S,P Disable program branching for receive interrupt SET TIMEOUT S,P Set the maximum wait time for response from interface ON TIMEOUT S,P Enable program branching on timeout OFF TIMEOUT S,P Disable progr am branching on timeout

RESET

HALT S,P Cancels output operation initiated with the TRANSFER statement STATUS S,P,R Refer to status registers CONTROL S,P,R Change control registers

S: slot number P: port number R: register number

S Module reset … initialization of the communication buffer and S,P[,0] Port reset … init ialization of the communication buffer and S,P,1 Buffer reset … initialization of only the communication buffer

Mask / unmask receive interrupt f or specified ports

communication conditions for all ports communication conditions for spec ified ports

5-1

IM 34M6H21-01E 2nd Edition : Aug, 2001-00

5.2 Error Codes

The following table lists the error codes for F3RS22-0N and F3RS41-0N together with a short description and the possible causes.

Table 5.2 Error Codes

Error Code

Detailed

Error Code

82 Error in function 91 Parameter error - Port number is invalid.

9D ASSIGN

D1 Module not C1 User buffer C7 Reset detected - Only the module side detected a power failure and performs a reset start,

D4 *

E1 Self-diagnosed E2 Module busy - A command other than HALT is executed for the port during TRANSFER.

The contents can be classified by referring to the STATUS register (register number 3) (see “

Description Possible Causes

specification

statement not executed

installed overflow

Parity error - The setting of the parity bit is different at t he sending side and receiving Framing error - The length of data bit, length of stop bit and the data transfer rate are Overrun error - Received data overflows the receiving buffer.

Internal buffer overflow Character-tocharacter receiving interval timeout Break received

error Line busy - When CD check is 1 and the monitored time z 0, and CD is not turned off

Timeout



Using Registers” in Section 4.4).

- Cable is not connected.

- An attempt was made to execute a command that is not supported.

- Specification of sl ot number and port number clas hes with other I/O modul es.

- A non-existent register number is specified i n a CONTROL or STATUS statement.

- ASSIGN statement has not been executed or an invalid slot number was assigned.

- Module is not connec ted.

- Slot number is inval id. A data larger than the buffer in BASIC is received.

this leads to inconsistency between the parameters at the module side and driver side.

side. different at the s ending and receiving sides.

- Despite continual sending of data, data overflows buffer at BASIC.

- Wit h the character-to-character receiving interval timeout processing set to Receive Error, data such as the ending character or the number of specified characters i s not received, resulting in timeout.

- Remote side has sent a break signal

- Error occur s because of self-diagnosis (memory check) in the regul ar state.

within the.preset time period.

- When DR check is 1 and the monitored time within the preset t ime period.

(1) Receiving side When waiting to receive in the ENTER statement, the remote side did not send within the I/O moni tored time period. (2) Sending side

- CS is OFF.

- When CD check is 1 and the monitored t ime = 0, and CD is ON.

- When DR check is 1 and the monitored time = 0, and DR is OFF. (caused by faulty c ables or remote equipment)

5-2

0, and DR is not turned on

IM 34M6H21-01E 2nd Edition : Aug, 2001-00

5.3 Sample Programs

The following shows an example for F3RS22-0N. The program can be used similarly for F3RS41-0N (point-to-point) by declaring the use of RS41 in the ASSIGN statement.

z Explanations for the sample programs

Send (1) : Send with complete return access using the OUTPUT statement. Send (2) : Send with proceeding access using the TRANSFER / O N EOT

statements.

Receive (1) : Receive text input with complete return access using only the ENTER

statement.

Receive (2) : Receive text input with interrupt input using ENTER, ON INT / ENABLE

INTER statements.



100 ! F3RS22-0N Example SEND (1)

110 !

120 DIM SENDBUF$256

130 SLOT = 3 : PORT = 2

140 !

150 ! Set communication conditions

160 ASSIGN RS22 = SLOT

170 CONTROL SLOT, PORT, 14; 7

180 CONTROL SLOT, PORT, 13; 2

190 SET TIMEOUT SLOT. PORT; 3000

200 RESET SLOT, PORT, 1

210 !

220 ! Send Data

230 SENDBUF$ = “ABCDEFGhijkl – 0123456789”

240 OUTPUT SLOT, PORT; SENDBUF$

250 END BSC : LIST

100 ! F3RS22-0N Example SEND (2)

110 !

120 DEFINT I

130 DIM SENDBUF$256, OUT$256

140 SLOT = 3 : PORT = 2

150 !

160 ! Set communication conditions

170 ASSIGN RS22 = SLOT

180 CONTROL SLOT, PORT, 14; 7

190 CONTROL SLOT, PORT, 12; 2

200 SET TIMEOUT SLOT. PORT; 3000

210 RESET SLOT, PORT, 1

220 !

230 ! Send Data

240 SENDBUF$ = “ABCDEFGhijkl – 0123456789”

250 OUTPUT OUT$; SENDBUF$

260 ON EOT SLOT, PORT GOSUB EOT@

270 TRANSFER SLOT, PORT FORMAT FROM OUT$

280 !

290 ! Other processing

300 WHILE IEND = 0

310 WAIT

320 END WHILE

330 STOP

5-3

:! Assign card

:! 9600bps

:! Even parity

:! Timeout 3 seconds

:! Reset buffer

:! complete return access

(Type I)

:! Assign card

:! 9600bps

:! 2 stop bits

:! Timeout 3 seconds

:! Reset buffer

:! Output to buffer

:! Interrupt for end of transfer

:! Start (type I)

IM 34M6H21-01E 2nd Edition : Aug, 2001-00

340 EOT@ STATUS SLOT, PORT, 4; IOUT

350 IF IOUT <> 0 THEN

360 DISP “Transfer error !!”, HEX$(IOUT)

370 ELSE

380 DISP “Transfer end”

390 ENDIF

400 IEND = 1

410 RETURN

420 END

100 ! F3RS22=0N Example RECEIVE (1)

110 !

120 DIM REC$256

130 SLOT = 3 : PORT = 2

140 !

150 ! Set communication conditions

160 ASSIGN RS22 = SLOT

170 CONTROL SLOT, PORT, 14; 7

180 CONTROL SLOT, PORT, 13; 0

190 CONTROL SLOT, PORT, 12; 2

200 SET TIMEOUT SLOT. PORT; 3000

210 RESET SLOT, PORT, 1

220 !

230 ! Receiving (Complete Return Type)

240 SET STATUS ERR

250 ENTER SLOT, PORT FORMAT; REC$

260 IF ERR = 82 THEN

270 IF ERRCE <> $E6 THEN

280 DISP “error”, HEX$(ERRCE)

290 ELSE

300 GOTO 250

310 ENDIF

320 ELSE

330 DP “time”; TIME$, “receive data”; REC$

340 ENDIF

350 RESET STATUS

360 END

100 ! F3RS22-0N Example RECEIVE (2)

110 !

120 DEFINT I

130 DIM REC$256

140 SLOT = 3 : PORT = 2

150 !

160 ! Set communication conditions

170 ASSIGN RS22 = SLOT

180 CONTROL SLOT, PORT, 14; 7

190 CONTROL SLOT, PORT, 12; 2

200 SET TIMEOUT SLOT. PORT; 3000

210 RESET SLOT, PORT, 1

220 !

230 ! Interrupt Declaration

240 ON INT SLOT, PORT GOSUB REC@

250 ENABLE INTR SLOT, PORT; “111”

260 !

270 WHILE IEND = 0

5-4

:! Interrupt raised because end of output

:! Assign Card

:! 9600bps

:! No parity

:! 2 stop bits

:! Timeout 3 seconds

:! Reset buffer

:! Receive (Type II)

:! Assign card

:! 9600bps

:! 2 stop bits

:! Timeout 3 seconds

:! Reset buffer

IM 34M6H21-01E 2nd Edition : Aug, 2001-00

280 WAIT

290 END WHILE

300 STOP

310 !

320 REC@ ! INTERRUPT INPUT SUBROUTINE

330 STATUS SLOT, PORT, 2; IREC

340 IF IREC = 0 THEN

350 ENTER SLOT, PORT FORMAT; REC$

360 DP “time”; TIME$, “receive data”; REC$

370 ELSE

380 DISP “error or break received”

390 ENDIF

400 ENABLE INTR SLOT, PORT; “111”

410 IEND = 1

420 RETURN

430 END



5-5

:! Interrupt branch condition

:! Normal receive?

:! Receive (type II)

IM 34M6H21-01E 2nd Edition : Aug, 2001-00

Blank Page

Appx.1-1

Appendix 1. Signal Description and

Direction of Signal Lines (RS-232-C)

The following figure and table describe the RS-232-C signals and the signal directions for the F3RS22-0N module.

The selection of the direction of signal lines (only for those that are selectable) is performed with software setting.

In the following figure, signal lines between ER to CD (inclusive) are control lines w hilst SD and RD are data lines.



F3RS22-0N

CS (clear to send…ready to receive)

Figure appx. 1 RS-232-C Signals

Table appx. 1 Direction of RS-232-C Signal Lines

Pin Number

F3RS22-0N

3 SD Send Data Output  2 RD Receive Data Input  7 RS Request to

8 CS Clear to Send Input 9 Signal from the remote side granting permi ssion

6 DR Dataset Ready Input 9 Us ed to check whether the remote side can

5 SG Signal Ground  1 CD Data Carrier

4 ER Data Terminal

Mnemonic Signal Name

Send

Detect

Ready

ER (FA-M3 ready)

DR (destination ready)

RS (request to send…ready to receive?)

CD (data carrier detection)

SD (send data) RD (receive data)

Input

/Output

Output

Input 9 If this signal is not on, a carri er wave is not

Output

Signal

Monitoring



Used when sending data to the remote s ide.

(1) Always ON (default ). (2) ON only during sending.

to send. Cannot send if this signal is not ON.

transmit. (1) Send regardless of the state of DR (default).



(2) Send only when DR is ON.

received. Sending may proceed as follows: (1) Send regardless of the state of CD (default) (2) Send only when CD is OFF.

( 1) Turns on at power-on and s tays on (default).

(2) Can be turned on or off using software.

Remote

equipment

computer,

modem, etc.

Function

IM 34M6H21-01E 2nd Edition : Aug, 2001-00

Appendix 2. Data Transmission

Start-Stop Synchronous Transmission

The F3RS22-0N and F3RS41-0N modules transmits using a start-stop synchronous mode.

When a character is transmitted in start-stop synchronization, a start bit is first transmitted, followed by the character bits (7 t o 8 bits) in descending sequence, the parity bit and the stop bit(s). The start bit, p arity bit and stop bit(s) are automatically inserted by the module and are transparent to the user.

The transfer data rate, data bit length and ot her communication parameters are set using software.

Appx.2-1



Line idle

LSB, Least signifi c ant bit

Start bit

z Text



1 character

Character data

(7 to 8 bits)

Parity bit

Figure appx. 2 Start-Stop Synchronous Transmission

Odd, even or unused

Stop bit

1.5 2

Line returns to idle state (dotted line) or carries the start bit of the next character (solid line)

Transmission data usually consists of multiple characters terminated by a terminator (ending character), known as text, and recognized by the user as a piece of dat a. The maximum length of text data is 1024 bytes.

1 character Terminator

A B C D

1 text data

Figure appx.3 Example of One Character

IM 34M6H21-01E 2nd Edition : Aug, 2001-00

Appendix 3. ASCII Codes

b6 0 0 0 0 1 1 1 1

Bit

b3 b2 b1 b

0 0 0 0 0 NUL DLE SP 0 @ P ‘ p 0 0 0 1 1 SOH DC1 ! 1 A Q a q 0 0 1 0 2 STX DC2 " 2 B R b r 0 0 1 1 3 ETX DC3 # 3 C S c s 0 1 0 0 4 EOT DC4 $ 4 D T d t 0 1 0 1 5 ENQ NAK % 5 E U e u 0 1 1 0 6 ACK SYN & 6 F V f v 0 1 1 1 7 BEL ETB ’ 7 G W g w 1 0 0 0 8 BS CAN ( 8 H X h x 1 0 0 1 9 HT EM ) 9 I Y i y 1 0 1 0 A LF SUB * : J Z j z 1 0 1 1 B VT ESC + ; K [ k { 1 1 0 0 C FF FS , < L ¥ l | 1 1 0 1 D CR GS - = M ] m } 1 1 1 0 E SO RS . > N ^ n ~ 1 1 1 1 F SI US / ? O _ o DEL

Control codes Character codes

b5 0 0 1 1 0 0 1 1

order

Low order

High-

0 1 0 1 0 1 0 1

0 1 2 3 4 5 6 7

Appx.3-1

IM 34M6H21-01E 2nd Edition : Aug, 2001-00

Appx.3-2

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IM 34M6H21-01E 2nd Edition : Aug, 2001-00

Revision Information

Document Name : Serial Communication Modules Document No. : IM 34M6H21-01E

Edition Date Revised Item

1st Dec, 1998 New Publication

2nd Aug, 2001 Addition of explanations on support of CE Mark; Correction of typographical errors

Written by Product Marketing Department, IT Controller Center. Yokogawa Electric Corporation Published by Yokogawa Electric Corporation 2-9-32 Nakacho, Musashino-shi, Tokyo, 180-8750, JAPAN Printed by Yokogawa Graphic Arts Co., Ltd.

IM 34M6H21-01E 2nd Edition : Aug, 2001-00

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YOKOGAWA F3RS22-0N, F3RS41-0N User Manual

Specifications and Main Features

Frequently Asked Questions

User Manual

Applicable Product:

Important

Introduction

Copyrights and Trademarks

CONTENTS

1. Overview

2. F3RS22-0N

2.1 Standard Specifications

2.2 External Wiring

2.3 Attaching and Detaching Modules

3. F3RS41-0N Communication Module

3.1 Standard Specifications

3.2 External Wiring

4. Using the Communication Module

4.1 Basic Communications

4.2 Transmission Text and Format Specifications

4.3 Efficient Communication

4.4 Using Registers

4.5 Special Communications

4.6 Multi-point Connection

5. BASIC Statements and Error Codes

5.1 BASIC Statements

5.2 Error Codes

5.3 Sample Programs

Appendix 2. Data Transmission

Appendix 3. ASCII Codes

Revision Information