Yokogawa DR240 User Manual

Models DR130/DR231/DR232/DR241/DR242

Communication Interface

Instruction Manual

IM DR231-11E

IM DR231-11E

6th Edition

Introduction

This Communication Interface User’s Manual describes the functions and commands of the optional GP-IB, RS-232-C, RS-422-A/RS-485, and Ethernet interfaces. Read this manual carefully before using these interface functions, and be sure to keep this manual on hand for future reference should any problems arise.

As manuals relative to the DR130, DR231, DR232, DR241 and DR242, the following manuals are also provided. Read them if necessary.

Name of manuals	Manual No.
DR130/DR231/DR241 Hybrid Recorder (Stand-alone model)	IM DR231-01E
or
DR232/DR242 Hybrid Recorder (Expandable model)	IM DR232-01E

Note

•YOKOGAWA reserves the right to change the content of this manual at any time without prior notice because of improvements in performance or functions. Actual displays on the screen may also be a little different from the screen displays described in this manual.

•All reasonable efforts have been made to ensure the accuracy of this manual. If, however, any errors or ambiguities are found, please inform YOKOGAWA.

•No part of this manual may be reproduced in any form without the prior written permission of YOKOGAWA.

•The warranty card is attached to the packing box. This card cannot be reissued. Thoroughly read the card and carefully store it.

Trademark

•MS-DOS and Windows are registered trademarks of Microsoft Corporation, USA.

•Other product names are trademarks or registered trademarks of the relevant companies.

History

First edition:	January 1996
2nd edition:	June 1996
3rd edition:	September 1996
4th edition:	March 1997
5th edition:	November 1998
6th edition:	November 1999

Disk No. RE02

6th Edition: November 1999 (YK)

All Rights Reserved, Copyright 1996 Yokogawa Electric Corporation

IM DR231-11E

1

Configuration and Use of This Manual

Configuration

This user’s manual is composed of chapter 1 to chapter 8, Appendix, and indices.

Chapter 1 Overview and Specifications of GP-IB Interface

Describes the functions and specifications of the GP-IB interface and the address setting method.

Chapter 2 Overview and Specifications of RS-232-C Interface

Describes the functions and specifications of the RS-232-C interface and the parameter setting method.

Chapter 3 Overview and Specifications of RS-422A/RS-485 Interface

Describes the functions and specifications of the RS-422-A/RS-485 interface and the parameter setting method.

Chapter 4 Overview and Specifications of Ethernet Interface

Described the functions and specifications of the ethernet interface and the setting method.

Chapter 5 Command Format

Describes how to specify command formats and channel numbers.

Chapter 6 Commands

Describes the commands for various setting items, commands for executing actions, data request commands for measured data saved in memory, or commands requesting output of internally set data.

Chapter 7 Output Format

Describes the output formats for set data, measured data, etc.

Chapter 8 Sample Program

Useful sample programs are presented.

Appendix Computation Equation

Describes the optional computation equation. Index There are command and general indices.

2	IM DR231-11E

TABLE OF CONTENTS

INTRODUCTION....................................................................................................................................................................		1
CONFIGURATION AND USE OF THIS MANUAL ....................................................................................................		2
CHAPTER 1 OVERVIEW AND SPECIFICATIONS OF GP-IB INTERFACE
1.1	Description of Functions (GP-IB) ..................................................................................................................	1-1
1.2	Setting of Address of GP-IB Interface ............................................................................................................	1-3
1.3	Specifications ..................................................................................................................................................	1-4
CHAPTER 2 OVERVIEW AND SPECIFICATIONS OF RS-232-C INTERFACE
2.1	Description of Functions (RS-232-C) .............................................................................................................	2-1
2.2	Specifications ..................................................................................................................................................	2-3
2.3	RS-232-C Interface Connection .....................................................................................................................	2-4
2.4	Handshake Format Selection ..........................................................................................................................	2-6
2.5	Communication Data Format .........................................................................................................................	2-8
2.6	RS-232-C Interface Parameter Setting Procedure ..........................................................................................	2-9
CHAPTER 3 OVERVIEW AND SPECIFICATIONS OF RS-422-A/RS-485 INTERFACE
3.1	Description of Functions (RS-422-A/RS-485) ...............................................................................................	3-1
3.2	Specifications ..................................................................................................................................................	3-2
3.3	RS-422-A/RS-485 Interface Connection ........................................................................................................	3-3
3.4	Communication Data Format .........................................................................................................................	3-8
3.5	RS-422-A/RS-485 Interface Parameter Setting Procedure .............................................................................	3-9
CHAPTER 4 OVERVIEW AND SPECIFICATIONS OF ETHERNET INTERFACE
4.1	Introduction of Functions (Ethernet) ..............................................................................................................	4-1
4.2	Specifications ..................................................................................................................................................	4-3
4.3	Names and Functions of Each Section ...........................................................................................................	4-4
4.4	Setting the IP Address ....................................................................................................................................	4-6
4.5	Connection Methods .......................................................................................................................................	4-8
4.6	Checking the Connection (Loopback test) .....................................................................................................	4-9
4.7	Transferring the Instantaneous Values .........................................................................................................	4-10
4.8	Displaying the Communication Information ................................................................................................	4-12
4.9	Setting the Timeout .......................................................................................................................................	4-14
CHAPTER 5 COMMAND FORMAT
5.1	Command Format ...........................................................................................................................................	5-1
5.2	Command Syntax ............................................................................................................................................	5-3
5.3	Setting a Channel No., and Alarm Output Relay No. .....................................................................................	5-4
5.4	Command List ................................................................................................................................................	5-5
5.5	Input Range Parameter ...................................................................................................................................	5-7
5.6	ASCII Code Table ........................................................................................................................................	5-10
CHAPTER 6 COMMANDS
6.1	Setting the Input ..............................................................................................................................................	6-1
	Range Setting (SR)
	Unit Setting (SN)
	Filter Setting (XQ)
	Measurement Period Setting (XV)
	A/D Integration Setting (XI)
6.2	Setting Alarms ................................................................................................................................................	6-4
	Alarm Setting (SA)
	Performs Alarm-related Settings (XA)
	Relay Reflash Setting (XY)
	Relay AND/OR Setting (XN)
	Relay Energizing/Deenergizing Setting (XD)
	Relay Hold/Non-hold Setting (XH)

1

2

3

4

5

6

7

8

App

Index

IM DR231-11E

3

TABLE OF CONTENTS

6.3	Setting the Display ..........................................................................................................................................	6-5
	Setting the display mode on the upper part of the display (UD)
	Setting the display mode on the middle part of the display (MD)
	Setting the display mode on the lower part of the display (LD)
	Setting the switching time for the displayed channel (XW)
6.4	Setting the Recording .....................................................................................................................................	6-6
	Chart speed setting (SC)
	Second chart speed setting (SE)
	Select the trend records/logging records (SS)
	Recording zone setting (SZ)
	Partially expanded recording setting (SP)
	Message setting (SG)
	Tag setting (ST)
	Header setting (SH)
	Title setting (SJ)
	Format for list printing setting (SF)
	Interpolation setting (SB)
	Trend recording ON/OFF (PT)
	Digital recording ON/OFF (PD)
	Manual printing ON/OFF (PM)
	Alarm printing ON/OFF (PA)
	Scale printing ON/OFF (PC)
	List printing ON/OFF (PL)
	Performs settings related to records (XR)
	Dot printing colors setting (XC)
6.5	Other Settings ...............................................................................................................................................	6-10
	Date and time setting (SD)
	Moving average setting (SV)
	Copy between channels (SY)
	Group setting (SX)
	Timer setting (SI)
	Match time setting (SQ)
	Event/action setting (SL)
	Computation Expression Setting (SO : with optional computation function or floppy disk drive function)
	Computation Constant Setting (SK : with optional computation function)
	Communication Input Data Setting (CM : with optional computation function)
	Setting the channel for setting data that are stored on a RAM disk (MH : floppy disk drive function)
	Setting hourly/daily/monthly report to ON/OFF and the time to create the report (RO : with optional report
	function)
	Setting report channel to ON/OFF and the report computation type (RM : with optional report function)
	Setting the automatic print at the time when the report is created to ON/OFF (RI : with optional report function)
	Summer/winter time (SW)
	Key lock setting (XK)
	Function screen setting (XF)
	Setting screen setting (XS)
	Burnout setting (XB)
	Reference junction compensation setting (XJ)
	Setting of Computation Error Handling Method (XG : with optional computation function)
	Setting of temperature unit (XT)
	Setting of language (XL)
	Setup setting data (XE)
	Setting for execution, data modification, and data storage in A/D calibration (XZ)
6.6	Control and Execution Command ................................................................................................................	6-14
	Recording start/stop(PS)
	Manual printing start/stop (MP)
	List printing start/stop (LS)

Header printing start/stop (HD)

Setup list printing start/stop (SU)

Message printing start (MS)

Acknowledgment of alarm status (AK)

Alarm reset (AR)

Timer reset (IR)

4	IM DR231-11E

TABLE OF CONTENTS

Alarm buffer clear (AC)
Message buffer clear (MC)
Computation start/stop (EX : with optional computation function or floppy disk drive function)
Storing measured data on a RAM disk (MW : floppy disk drive function)
Reading measured data on a RAM disk (MR : floppy disk drive function)
Storing set data on a RAM disk (MV : floppy disk drive function)
Reading setting data on a RAM disk (ML : floppy disk drive function)
Deleting files on a RAM disk (ME : floppy disk drive function)
Copying a file (MY : floppy disk drive function)
Storing set data on a floppy disk (FV : floppy disk drive function)
Reading setting data on a floppy disk (FL : floppy disk drive function)
Deleting a file on a floppy disk (FE : floppy disk drive function)
Storing set data in setup mode (YV : floppy disk drive function)
Reading set data, which have been stored, in setup mode (YL : floppy disk drive function)
Deleting a file in setup mode (YE : floppy disk drive function)
Executes the initial balancing of the strain input channel (BL)
Report start/stop (DR : with optional report function)
Report printing start/stop (RP : with optional report function)
System reconstruction (RS)
RAM clear (RC)
Setting mode selection (DS)
6.7 Data Output Request Command ...................................................................................................................	6-17
Selection of talker output data (TS)

Measured data output request (FM)

Format specification for measured data on the RAM disk (MF : floppy disk drive function)

Report data output request (RF : with optional report function)

Setting data output request (LF)

System configuration data output request (CF)

Byte output order specification (BO)

Interrupt mask specification (IM)

Auxiliary mask specification (SM)

CHAPTER 7 OUTPUT FORMAT

7.1	Functions as Talker .........................................................................................................................................	7-1
7.2	Measured/Computed Data Output Format (ASCII code) ...............................................................................	7-2
7.3	Measured/Computed Data Output Format (Binary code) ..............................................................................	7-3
7.4	Setting Data Output Format (Operation mode) ..............................................................................................	7-4
7.5	Setting Data Output Format (Setup mode) .....................................................................................................	7-6
7.6	Output Format for Unit and Decimal Point Position ......................................................................................	7-7
7.7	System Configuration Output Format ............................................................................................................	7-8
7.8	A/D Calibration Data Output Format .............................................................................................................	7-9
7.9	RAM Disk Output Format (File Directory Output) ......................................................................................	7-10
7.10	RAM Disk Output Format (ASCII Code) ....................................................................................................	7-11
7.11	RAM Disk Output Format (Binary Code) ....................................................................................................	7-13
7.12	RAM Disk Output Format (Channel On/Off) ..............................................................................................	7-15
7.13	Report Output Format ...................................................................................................................................	7-16

CHAPTER 8 SAMPLE PROGRAM

8.1	GP-IB Sample Programs .................................................................................................................................	8-1
8.2	RS-232-C Sample Programs ...........................................................................................................................	8-4
8.3	RS-422-A/RS-485 Sample Programs .............................................................................................................	8-7
8.4	Ethernet Program ..........................................................................................................................................	8-13

APPENDIX

App. 1 Computing Equation ....................................................................................................................... App-1

INDEX

General index ....................................................................................................................................................	Index-1
Command Index ................................................................................................................................................	Index-4

1

2

3

4

5

6

7

8

App

Index

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5

1.1 Description of Functions (GP-IB)

Listener and Talker Functions

Listener Function

This allows almost all settings except power on/off and operation control.

•Settings except communication settings.

•Operation control except power on/off.

•Call-up of setting data

•Specifying of output data (specifying of channel numbers or output data types)

•Specifying of causes of interrupt generation (see IM command: page 6-18)

Talker Function

The following data can be output:

•Measured data

•Data on RAM disk

•Report data

•Computed data

•System configuration

•Data for operation mode setting

•Data for setup mode setting

For measured data, data on RAM disk and computed data, either binary output or ASCII output can be selected. Report data are output in binary format. Other data are output in the form of ASCII data.

Data Output

When trigger (GET) becomes activated, DR130/DR230/DR240 will store the new data in a buffer. When an output request such as the FM command is received, these new data will be output.

Note when dividing and reading in data output from DR with the personal computer:

The data group being read in after ATN* has just become TRUE may miss its first bite.

Example of N88-BASIC (Standard language for PC9801 series) Dividing and reading in measured data by every line

70 PRINT @1; “FM0, 001,010” 80 LINE INPUT @1; D$: PRINT D$ 90 LINE INPUT@1; D$: PRINT D$

100 IF MID$ (D$, 2, 1)<>“E” THEN 90

Because the specification of talker address is repeated in the line 90 LINE INPUT@1; D$:PRINT D$, ATN becomes TRUE before the third data group being read in.

Precaution:

70 PRINT @1; “FM0, 001,010” 80 LINE INPUT @1; D$: PRINT D$ 90 LINE INPUT@; D$:PRINT D$

100 IF MID$ (D$,2,1)<>“E” THEN 90

The command is changed into LINE INPUT@; D$:PRINT D$ in the line 90. ATN won’t become TRUE if the specification of talker address is not repeated.

It’s unnecessary to repeat the specification when reading in data from the same address.

* ATN is a signal for data distinction: TRUE (0) Device message

FALSE (1) Interface message

1

Interface IB-GP of Specifications and Overview

IM DR231-11E

1-1

1.1 Description of Functions

Status Byte Format

The format of status byte output in serial polling is as follows:

Upper-level byte

Lower-level byte

0

0

0

Interrupt generated at the end of A/D conversion.

Interrupt generated at the time of syntax error.

Interrupt generated when the internal timer is being operated

or hourly, daily and monthly reports are created.

Interrupt generated after storing data on media, or reading

data from media (with a floppy disk drive).

Interrupt generated when the chart reaches it’s end.

Interrupt generated when measurement release is generated

while computation is in progress (with computation

functions).

SRQ

Bit 8: Not used. Always 0.

Bit 7:

SRQ

This bit changes to 1 when any cause of the bits 1 to bit 6 has been generated and interrupts

the controller. After responding to serial polling, this bit is set to 0.

Bit 6 This bit changes to 1 when a measurement release is generated while the computation is in

progress;

otherwise, it is 0. This bit is effective only with optional computation functions.

After responding to serial polling, this bit is set to 0.

Bit 5 This bit changes to 1 when the chart reaches its end.

Bit 4 This bit changes to 1 after storing data on media, or reading data from media; otherwise, it is 0. After responding to serial polling, this bit is set to 0.

Bit 3 This bit changes to 1 when the internal timer is being operated or hourly, daily and monthly reports are created. Whenever one of the internal timers 1 to 6 is being used or reports are created, the bit changes to 1. After responding to serial polling, this bit is set to 0.

Bit 2: This bit changes to 1 when a syntax error occurs in a command and is normally 0.

If there is an error in a command description, this changes to 1. After responding to serial polling, this bit is set to 0.

Bit 1: This bit changes to 1 at the end of an A/D conversion; otherwise, it is 0.

When the A/D conversion of measured data is terminated, this changes to 1. After responding to serial polling, this bit is set to 0.

Status byte and serial polling

•In IM commands, the bit status that is to be made effective must be specified. The status of unspecified bits does not change to 1.

•If a new cause is generated before reading out a status byte for which a cause has already been generated, the existing cause remains in the status byte as is and the new cause is added. For example, if bit 1 is in 1 state and bit 2 is newly changed to 1 before reading out the status byte, both bit 1 and bit 2 become 1.

The initial value

The initial value is ‘ IM2 ’.

1-2	IM DR231-11E

1.2 Setting of Address of GP-IB Interface

The GP-IB address is set with the rotary switch located on the side of the GP-IB module connector. Turn the arrow on the rotary switch with a flat-blade screwdriver or the like to align the arrow with the address to be set.

F0

CDE

B

A 98

12
3
4
76	5

	F0	1
D	E	2
		3
		4
C
B		6	5
	A
	98	7
Rotary switch with			Address is the numeral
which address is			to which the arrow is pointed
to be set

1

Interface IB-GP of Specifications and Overview

IM DR231-11E

1-3

1.3 Specifications

Electrical and mechanical specifications: Conforming to IEEE St’d 488-1975

Code to be used:		ISO (ASCII) code
Function specifications
Function	Subset name	Description
Source handshake	SH1	All transmission handshake functions operative
Acceptor handshake	AH1	All transmission handshake functions operative
Talker	T6	Basic talker functions, serial poll, and talker release function
		by listener are provided.
Listener	L4	Basic listener function and listener release function by talker
		are provided.
Service request	SR1	All service request functions operative
Remote/local	RL1	All remote/local functions operative
Parallel poll	PP0	No parallel poll function
Device clear	DC1	All device clear functions operative
Device trigger	DT1	All device trigger functions operative
Controller	C0	No controller function

1-4	IM DR231-11E

2.1 Description of Functions (RS-232-C)

Listener and Talker Functions

Listener Function

This allows almost all settings except power on/off and operation control.

•Settings except communication settings.

•Operation control except power on/off.

•Call-up of setting data

•Specifying of output data (specifying of channel numbers or output data types)

Talker Function

The following data can be output:

•Measured data

•Data on RAM disk

•Report data

•Computed data

•System configuration

•Data for operation mode setting

•Data for setup mode setting

For measured data, data on RAM disk and computed data, either binary output or ASCII output can be selected. Report data are output in binary format. Other data are output in the form of ASCII data.

Data Output

When trigger(GET) becomes activated DR130/DR230/DR240 will store the new data in a buffer. When an output request such as the FM command is received, these new data will be output.

2

Interface C-232-RS of Specifications and Overview

IM DR231-11E

2-1

2.1 Description of Functions

Commands Applicable to RS-232-C Only

The following commands are only applicable to RS-232-C.

ESC T Trigger Execution

Setting	ESC T<terminator>
Description	Before executing this command, select the output data using the TS command. The
	data selected with the TS command are prepared for output. The data are output
	with the FM, LF, CF, MF or RF command.
ESC S Status Output Command
Setting	ESC S<terminator>
Description	The status for a sent command is output.
ESC R Switch from Local Status to Remote Status
Setting	ESC R<terminator>
Description	• Panel setting conditions in the local status are retained even if the status is switched
	to the remote status.
	• When the status is switched to the remote status, no key except DISP can be used.
	Panel operation can be done by pressing the DISP key or switching the status to
	local using the ESC L command described below.

ESC L Switch from Remote Status to Local Status

Setting	ESC L<terminator>
Description	The panel setting conditions in the remote status are retained even if the status is
	switched to the local status.

Note

• ESC corresponds to hexadecimal code (1B)H.

Status Byte Format

When the status byte output command (ESC S) is received, any of the ER00CRLF to ER03CRLF status will be output.

ER CrLf

An ASCII character string of a numeral (numerals) shown inparentheses at the end of any of the following items or the sum of the numerals of the relevant items is output.

For example, if out-of-chart and timer operation occur, ER20CrLf is output.

Items not specified with an IM command are invalid and not included in this status output.

•A/D conversion end (1)

When an A/D conversion for measured data ends, “1” is output.

•Syntax error (2)

If an error occurs in the description of a command, “2” is output.

•Internal timer or time when hourly, daily and monthly reports are created(4)

If any of the 6 timers (1 to 6) or the time for hourly, daily and monthly reports arrives set with an auxiliary mask operates, “4” is output.

•Storing data or reading data end (8)

When storing data on media, or reading data from media ends, “8” is output.

•Out-of-chart (16)

If out-of-chart is detected, “16” is output.

•Measurement release (32)

If a measurement release is generated while the computation is in progress, “32” is output.

Items Applicable to RS-232-C Only

With RS-232-C, all commands can be acknowledged by ACK output. The ACK output is as follows, except for the FM, LF, CF, RF and BL commands, whose ACK output will described later on.

E0 : Commands are processed succesfully

E1 : Commands are not processed succesfully

After having sent the output request, make sure to retrieve the data.

2-2	IM DR231-11E

		2.2	Specifications
			Electrical & mechanical specs	: Conform to the EIA RS-232-C Standard.
			Connection format	: Point-to point
			Communication format	: Half duplex
			Synchronizing format	: Start-stop asynchronous transmission
				(synchronized by start/stop bit)
			Baud rate (bps)	: 150, 300, 600, 1200, 2400, 4800, 9600, 19200, 38400
			START bit	: 1 bit, fixed.
			Data length	: Either 7 or 8 bits (selectable).
			Parity	: Even, Odd, or None (selectable).
			STOP bit	: Either 1 or 2 bits (selectable).
			Connector	: DBSP-JB25S (JAE)
			Hardware handshake	: Transmission/reception control by DTR, RTS, CTS.
			Software handshake	: Transmission control by XON, XOFF.
			Reception buffer length	: 200 bytes
			Escape sequence	: Trigger;
				Status call.

2

Interface C-232-RS of Specifications and Overview

IM DR231-11E

2-3

2.3 RS-232-C Interface Connection

When connecting this instrument to a personal computer, first it is necessary to match settings such as handshake format, data transmission speed, and data format at the computer’s side. For details relating to these settings, refer to the description on this and following pages. Furthermore, make sure to use an interface cable which matches this instrument’s specifications.

Connector and Signal Names

2

3

4

5

20
7
Numeric values in the above figure indicate Pin Nos.
2.TXD (Send Data)	: Data transmitted to the host computer.
	Signal direction : Output.
3.RXD (Received Data)	: Data received from the host computer.
	Signal direction : Input.
4.RTS (Request to Send)	: Handshake signal used for reception of data from the host computer.
	Signal direction : Output.
5.CTS (Clear to Send)	: Handshake signal used for transmission of data to the host
	computer.
	Signal direction : Input.
7.GND (Signal Ground)	: Signal ground connection.

20.DTR (Equipment Ready) : Handshake signal used for reception of data from the host computer.

Signal direction : Output. Pin Nos. 1, 6 and 8 to 19 are not used.

Signal direction

	DTR [Transmission request	reception OK]	20
	RTS [Transmission request	reception OK]	4
Host Computer	CTS [Transmission enable	Ready]	5	DR series
	TXD [Transmission data]		2
	RXD [Reception data]		3

2-4	IM DR231-11E

						2.3 RS-232-C Interface Connection
RS-232-C Signal List and Corresponding JIS & CCITT Abbreviation
				Signal Table
	Pin No.		Abbreviation			Name
		RS-232-C		CCITT	JIS				2
	7	AB(GND)		102	SG	Signal ground
	2	BA(TXD)		103	SD	Transmitted data			Overview
	3	BB(RXD)		104	RD	Received data
	5	CB(CTS)		106	CS	Transmission enable
	4	CA(RTS)		105	RS	Transmission request			and
	20	CD(DTR)		108/2	ER	Data terminal ready			InterfaceC-232-RSofSpecifications

IM DR231-11E

2-5

2.4 Handshake Format Selection

In order to ensure proper data transfers between the recorder and the host computer via the RS-232- C interface, a mutual procedure is required for processing the electrical signals. Such a procedure is referred to as a ‘handshake’. Several handshake formats are available, with selection depending on the host computer being used. The same handshake format must be designated for both the recorder and the host computer.

The recorder parameter settings permit any one of the following 5 formats to be selected.

		Transmission Data Control					Reception Data Control
		(Control format when transmitting data					(control format when receiving data
		to the host computer)					from the host computer)
Format		Software	Hardware				Hardware
		Handshake	Handshake				Handshake
Selection
		Transmission is	Transmission			No	When reception	When reception		No
		stopped when	is stopped			Handshake	of data becomes	of data becomes		Handshake
		X-OFF is	when CTS is				impossible DTR	impossible RTS
		received, and is	FALSE, and is				becomes	becomes
		resumed when	resumed when				FALSE, when	FALSE, when
		X-ON is	CTS is TRUE.				data recept	data recept
		received.					becomes	becomes
							possible DTR	possible RTS
							becomes TRUE.	becomes TRUE.
O F F - O F F
X O N - R T S
X O N - D T R
C T S - R T S
C T S - D T R
OFF-OFF
•	Transmission data control			: There is no handshake status between the recorder and host
				computer. the X-OFF signal from the host computer is processed
				as data, and the CTS signal is ignored.
•	Reception data control			: There is no handshake status between the recorder and host
				computer. When the recorder reception buffer becomes full, the
				excess data is discarded.
				DTR=True, RTS=True (both fixed).

Note

•It is necessary to create a host computer program which prevents the recorder and host computer reception buffers from becoming full.

XON-RTS
•	Transmission data control	: A software handshake status is established between the recorder
		and the host computer. The recorder will stop a data transmission
		when an X-OFF signal is received from the host computer. The
		transmission will be resumed when the next X-ON signal is
		received.
		The CTS signal from the host computer is ignored.
•	Reception data control	: A hardware handshake status is established between the recorder
		and the host computer. When the recorder recept of data becomes
		impossible, an ‘RTS=False’ status will be established. When data
		recept becomes possible, an ‘RTS=True’ status will be established.
		DTR=True (Fixed).

2-6	IM DR231-11E

		2.4 Handshake Format Selection
XON-DTR
•	Transmission data control	: A software handshake status is established between the recorder
		and the host computer. The recorder will stop a data transmission
		when an X-OFF signal is received from the host computer. The
		data transmission will be resumed when the next X-ON signal is
		received. The CTS signal from the host computer is ignored.
•	Reception data control	: A hardware handshake status is established between the recorder
		and the host computer. When the recorder recept of data becomes
		impossible, an ‘DTR=False’ status will be established. When data
		recept become possible, an ‘DTR=True’ status will be established.
		RTS=True (Fixed).
CTS-RTS
•	Transmission data control	: A hardware handshake status is established between the recorder
		and the host computer. The recorder will stop a data transmission
		if a ‘CTS=False’ status is established, and will resume the
		transmission when a ‘CTS=True’ status is established. The X-
		OFF and X-ON signals from the host computer are processed as
		data.
•	Reception data control	: A hardware handshake status is established between the recorder
		and the host computer. An ‘RTS=False’ status will be established
		when the recorder recept of data becomes impossible, and an
		‘RTS=Ture’ status will be established when data recept becomes
		possible. DTR=Ture (Fixed).
CTS-DTR
•	Transmission data control	: A hardware handshake status is established between the recorder
		and the host computer. The recorder will stop a data transmission
		if a ‘CTS=False’ status is established, and will resume the
		transmission when a ‘CTS=True’ status is established. The X-
		OFF and X-ON signals from the host computer are processed as
		data.
•	Reception data control	: A hardware handshake status is established between the recorder
		and the host computer. A ‘DTR=False’ status will be established
		when the recorder recept of data becomes impossible and a
		‘DTR=True’ status will be established when data recept becomes
		possible. RTS=Ture (Fixed).

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2.5 Communication Data Format

The RS-232-C interface uses a START-STOP communication format. With this format, a START bit is placed at the beginning of each character transmitted, followed by the data bits, parity bit, and stop bit, in that order. (See the figure below.)

Return to ‘line idle’ condition (dotted line), or proceed to

‘Line idle’ 1 character next data START bit.

condition

Data bits

(7-8 bits)

						STOP bit
				Parity bit(Odd,		1
START bit				even, or none)		1 or 2
						2

2-8	IM DR231-11E

2.6 RS-232-C Interface Parameter Setting Procedure

Setting of the RS-232-C parameters must be carried out using the 3 dipswitches located next to the module connector.

	Parameter setting				ON
		1	2	3	4 OFF
	switch 1
					Data length
					Baud rate
	Parameter setting				ON
		1	2	3	4 OFF
	switch 2
					Baud rate
					Stop bit
					Parity
	Parameter setting				ON
		1	2	3	4 OFF
	switch 3
					Not use
					Handshake system

Baud rate (No.1 to 3 of setting switch 1 and No.4 of setting switch 2)

Baud rate	No.1	No.2	No.3	No.4 (switch 2)
150	OFF	OFF	OFF	OFF
300	OFF	OFF	ON	OFF
600	OFF	ON	OFF	OFF
1200	OFF	ON	ON	OFF
2400	ON	OFF	OFF	OFF
4800	ON	OFF	ON	OFF
9600	ON	ON	OFF	OFF	← Default
19200	ON	ON	ON	OFF
38400	OFF	OFF	OFF	ON

Data length (Switch No.4 of parameter setting switch 1)

Data length	No.4
7	OFF
8	ON	← Default

Parity (Switch No.1 and 2 of parameter setting switch 2)

Parity	No.1	No.2
NONE	OFF	OFF
ODD	OFF	ON
EVEN	ON	OFF	← Default

Stop bit (Switch No.3 of parameter setting switch 2)

Stop bit	No.4
1	OFF	← Default
2	ON

Handshake system (Switch No.1 to 3 of parameter setting switch 3)

Handshake system	No.1	No.2	No.3
No handshake	OFF	OFF	OFF ← Default
XON-ER*	OFF	OFF	ON
XON-RS*	OFF	ON	OFF
CS-ER	OFF	ON	ON
CS-RS	ON	OFF	OFF

* When the baud rate is set to 38400, there is no handshaking.

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3.1 Description of Functions (RS-422-A/RS-485)

Listener and Talker Functions

Listener Function

This allows almost all settings except power on/off and operation control.

•Settings except communication settings.

•Operation control except power on/off.

•Call-up of setting data

•Specifying of output data (specifying of channel numbers or output data types)

Talker Function

The following data can be output:

•Measured data

•Data on RAM disk

•Report data

•System configuration

•Data for operation mode setting

•Data for setup mode setting

For measured data and data on RAM disk, binary output or ASCII output can be selected. (for RS- 422-A with using the multi point.) Report data are output in binary format. Other data are output in the form of ASCII data.

Data Output

When trigger(ESC T) becomes activated DR will store the new data in a buffer. When an output request such as the FM command is received, these new data will be output.

Commands Applicable to RS-422-A/RS-485 Only

The following commands are only applicable to RS-422-A/RS-485.

ESC O Open Command (address a communication destination)

Setting	ESC O xx<terminator>
	xx : address, 01 to 31
Description	Specifies the communicating device by its address. When this command is ex-
	ecuted, all commands to the DR series (including ESC T) become effective.
	• Only one device can be opened.
	• Executing ESC O automatically closes all opened devices.
	• When the DR series receives this command correctly, it sends “ESC O xx” in
	response to the computer.
	• CR+LF can only used for the terminator.

ESC C Close Command (close the addressed state of a device)

Setting	ESC C xx<terminator>
	xx : address, 01 to 31
Description	Disconnects the device currently connected. When this command is executed, it
	allows opening communication with other devices with the ESC O command.
	• When the DR series receives this command correctly, it sends “ESC C xx” in
	response to the computer.
	• CR+LF can only used for the terminator.

The following commands are same as the RS-232-C interface. Refer to User’s Manual shown below.

ESC T (Trigger Execution), ESC S (Status Output Command)

Note

• ESC corresponds to hexadecimal code (1B)H. On the N88-BASIC, “ESC x” is denoted as “CHR$(&H1B)+”x”.”

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		3.2	Specifications
			Electrical & mechanical specs	: Conform to the EIA RS-422-A and EIA RS-485 Standard
			Connection format	: Multi-drop 1:n (n=16 for RS-422-A, n=31 for RS-485)
			Communication format	: Half duplex
			Synchronizing format	: Start-stop asynchronous transmission (synchronized by start/stop
					bit)
			Baud rate (bps)	: 300, 600, 1200, 2400, 4800, 9600, 19200, or 38400 (selectable)
			START bit	:	1 bit (fixed)
			Data length	:	Either 7 or 8 bits (selectable)
			Parity	:	Even, Odd, or None (selectable)
			STOP bit	:	Either 1 or 2 bits (selectable)
			Connector	:	6 point screw type terminal (uses M4 screws)
			Minimum response time	:	0, 10, 20, 50, or 100 ms (selectable)
			Reception buffer length	:	250 bytes
			Escape sequence	: Trigger, Status call, Open and Close
			Electrical characteristics	: SDA, SDB, RDA, RDB, SG. Between the signal terminal and
					the main internal circuit is insulated functionally.
			Communication distance	: 1.2 km maximum
			Terminator	: Internal resistor (120 ohm, 1W) switch with the slide switch

3-2	IM DR231-11E

3.3 RS-422-A/RS-485 Interface Connection

The following explains how the RS-422-A/RS-485 module is connected to the computer.

Cable Used

There are two types of cables: two-wire cable and four-wire cable. Make sure each type meets the

following conditions.
Cable used	: twisted pair shielded cable
		2 pairs of 24 AWG minimum (two-wire), 3 pairs 24 AWG mini-
		mum (four-wire)
Characteristic impedance	:	100 ohm
Capacitance	:	50 pF/m
Length of cable	: 1.2 km maximum *

*Communication distance of the RS-422-A/RS-485 interface is not the linear distance, but the total length of the cable (shielded twisted pair cable).

Terminal Arrangement of the RS-422-A/RS-485 Module

RD A Receive data A ( - )	SD A Send data A ( - )
RD B Receive data B ( + )	SD B Send data B ( + )
FG Frame ground	SG Signal ground

Screws used for the terminals:

ISO M4 screws, length 6 mm

Connecting the Cable

Attach crimp-on lugs (for 4 mm screws) with insulation sleeves on the leadwire ends as shown in the diagram below. Make the exposed portion of the shielded cable to be less than 5 cm.

Short the terminals.

SD/RD A

SD/RD B

SG

FG

Shield

FG potential

SG

SD A

SD B

RD B

RD A

Shield potential

For two-wire system

For four-wire system

WARNING

To prevent an electric shock, ensure the main power supply is turned OFF.

Note

•As shown on the next page, connect terminal RD to SD(TD) of the computer (converter) and terminal SD to RD of the computer.

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3.3 RS-422-A/RS-485 Interface Connection

Connecting to the Host Computer

Can be connected to a host computer with RS-232-C, RS-422-A, RS-485 ports.

•In the case of RS-232-C, a converter is used as shown in the diagram below.

•For information on recommended converters, refer to “Converters” in the latter.

•Dip switch needs to be changed depending on whether it is a two-wire system or four-wire system. Refer to “3.5 RS-422-A/RS-485 Interface Parameter Setting Procedure.”

Host

Computer

SDA( - )

SDB( + )

RDA( - )

RDB( + )

SG

In the case of four-wire system

In general, the recorder is wired to the host computer using a four-wire system. When four-wire system is used, the send and receive wires need to be crossed.

Terminator (externally applied) 120 ohm, more than 1/2 W

RS-422-A/RS-485 module

of the DA100/DR

	SD A
(SDA)	(SDA)
	SD B
(SDB)	(SDB)
	RD A
(RD A)	(RD A)
	RD B
(RD B)	(RD B)
	SG
(SG)	(SG)

FG

#1

SD A

SD B

RD A

RD B

SG

FG

#2

Terminator (Internal ON)

SD A

(SDA)

SD B

(SDB)

RD A

(RD A)

RD B

(RD B)

SG

(SG)

FG

#n

(#n≤ 31)

No terminators are inserted between #1 through #n-1 (internal OFF)

(Diagram below shows the case when the port of the host computer is RS-232-C)

Host

Computer

Terminator (externally applied) 120 ohm, more than 1/2 W

Terminator (Internal ON)

RS-232-C	RS-422-A/RS-485
	module
	of the DA100/DR
TD( - )	SD A	SD A	SD A
	(SDA)	(SDA)	(SDA)
TD( + )	SD B	SD B	SD B
	(SDB)	(SDB)	(SDB)
RD( - )	RD A	RD A	RD A
	(RD A)	(RD A)	(RD A)
RD( + )	RD B	RD B	RD B
	(RD B)	(RD B)	(RD B)
SHIELD	SG	SG	SG
	(SG)	(SG)	(SG)
	FG	FG	FG
Converter	#1	#2	#n
			(#n≤ 31)
Z - 101HE
(SHARP)	No terminators are inserted between #1 through #n-1 (internal OFF)

3-4	IM DR231-11E

3.3 RS-422-A/RS-485 Interface Connection

In the case of two-wire system

Connect send and receive terminals with the same signal polarity on the terminal arrangement of the RS-422-A/RS-485 module. Only two wires are used in connecting to other units.

Host

Computer

Terminator (externally applied) 120 ohm, more than 1/2 W

Terminator (Internal ON)

RS-422-A/RS-485 module

of the DA100/DR

SDA( - )	SD A
	(A)
SDB( + )	SD B
	(B)
RDA( - )	RD A
RDB( + )	RD B
SG	SG
	(SG)
	FG

#1

SD A	SD A
(A)	(A)
SD B	SD B
(B)	(B)
RD A	RD A
RD B	RD B
SG	SG
(SG)	(SG)
FG	FG
#2	#n
	(#n≤ 31)

No terminators are inserted between #1 through #n-1 (internal OFF)

(Diagram below shows the case when the port of the host computer is RS-232-C)

Host

Computer

	Terminator (externally applied) 120 ohm, more than 1/2 W		Terminator (Internal ON)
RS-232-C	RS-422-A/RS-485
	module
	of the DA100/DR
TD( - )	SD A	SD A	SD A
	(A)	(A)	(A)
TD( + )	SD B	SD B	SD B
	(B)	(B)	(B)
RD( - )	RD A	RD A	RD A
RD( + )	RD B	RD B	RD B
SHIELD	SG	SG	SG
	(SG)	(SG)	(SG)
	FG	FG	FG
Converter	#1	#2	#n
			(#n≤ 31)
Z - 101HE
(SHARP)	No terminators are inserted between #1 through #n-1 (internal OFF)

Note

•The method in eliminating noise depends on the condition in which it is used. In the example, shielded cable is grounded only at the DR (one-sided grounding). This method is effective in eliminating noise in long distance communication in which there is potential difference between the ground of the PC and the ground of the DR. When there is no potential difference between the ground of the PC and the ground of the DR, grounding both sides (two-sided grounding) is sometimes effective. In addition, there are cases when grounding both sides with one side having a capacitor connected in series is effective.

Consider all the above cases in eliminating the noise.

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3.3 RS-422-A/RS-485 Interface Connection

Converter

Recommended converter : Sharp Z-101HE

Caution

Some converters other than the recommended, do not have the FG and SG terminals insulated. In such cases, do not connect as in the diagram on the previous page (do not connect anything to the FG and SG terminals of the converter). Especially when it is long distance, the potential difference may damage the devices or the communication may become unreliable.

Also, converters without the SG terminal can be used without grounding. For details, refer to the converter’s manual.

Some converters other than the recommended have their signal polarity reversed (indication of A/B or +/-). In this case, reverse the connection. If the “RD” LED on the front panel of the RS-422-A/ RS-485 module blinks when it receives data, the connection is correct. If it lights, the connection may be reversed.

In the case of the two-wire system, the host computer must control the ON/OFF of the transmission driver of the converter in order to prevent the collision of the send and receive data. When using the recommended converter, ON/OFF is controlled using RTS.

Using the Module with Devices Using the RS-422-A

Maximum of 31 devices with respect to 1 host computer can be connected with this module, but in a system in which devices using the RS-422-A are used together, this may not be possible.

•In a system in which former Yokogawa recorders are used together

Some of the former Yokogawa recorders (such as HR2400 and R) use the RS-422-A driver. In this case, the maximum number of devices that can be connected is 16.

Note

•According to the RS-422-A standard, the maximum number of devices that can be connected with respect to one port is 10 devices (in the case of a four-wire system).

Terminator

When devices are connected in multi-drop configuration (includes point-to-point connections), turn the terminators of the modules on the extreme ends ON. All modules in between should have them turned off. Terminators are turned ON/OFF using the TERMIN switch on the front panel.

Also, turn ON the terminator on the host computer (refer to the computer’s manual). When converters are used, turn their terminators ON also. The recommended converter needs an external terminator to be installed, but some converters are internal types.

3-6	IM DR231-11E

3.3 RS-422-A/RS-485 Interface Connection

Minimum Response Time

Because send and receive are done on the same line in the two-wire system, minimum response time needs to be set. The minimum response time is the amount of time the RS-422-A/RS-485 module waits in order for the host computer to be able to receive the data after it sends data. The time can be set in the range from 0 to 100 ms. Set the time using the dip switch on the front panel of the RS-422- A/RS-485 module to match the computer or the converter’s specification. (Refer to “3.5 RS-422-A/ RS-485 Interface Parameter Setting Procedure.”) Note that the minimum response time is, as the name indicates, the minimum time for responding. Not all responses will take place in this time.

In the four-wire system, the minimum response time does not need to be set (set to 0 ms).

Response from the computer is too early

Active

DA100/DR side

Transmission driver
Data		PC -> DA100/DR Terminator						DA100/DR -> PC
Computer side		Active
Transmission driver
	Driver simultaneously becomes		Delay after sending the terminator
	output mode, and the data collides.

Insert appropriate time for waiting

DA100/DR side								Active
Transmission driver
Data
		PC -> DA100/DR Terminator					DA100/DR -> PC
Computer side		Active
Transmission driver
	No time interval in which there is		Delay after sending the terminator
	data collision.

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3.4 Communication Data Format

Same as the RS-232-C interface. For a description, refer to “2.5 Communication Data Format.”

3-8	IM DR231-11E

3.5RS-422-A/RS-485 Interface Parameter Setting

Procedure

Setting of the RS-422-A/RS-485 parameters must be carried out using the 4 dip switches located next to the module connector.

			SW1			ON
				2	3	4 OFF
			1
						Data length
						Baud rate
			SW2			ON
				2	3	4 OFF
			1
						four-wire/two-wire
						Stop bit
						Parity
			SW3			ON
				2	3	4 OFF
			1
						Address (upper)
						Minimum response time
			SW4			ON
				2	3	4 OFF
			1
						Address (lower)
Baud rate (No.1 to 3 of SW1)
Baud rate	No.1	No.2	No.3
300	OFF	OFF	ON
600	OFF	ON	OFF
1200	OFF	ON	ON
2400	ON	OFF	OFF
4800	ON	OFF	ON
9600	ON	ON	OFF ← Default Setting
19200	ON	ON	ON
38400	OFF	OFF	OFF
Data length (No.4 of SW1)
Data length	No.4
7	OFF
8	ON	← Default Setting

Parity (No.1 to 2 of SW2)

Parity	No.1	No.2
None	OFF	OFF
ODD	OFF	ON
EVEN	ON	OFF ← Default Setting

Stop bit (No.3 of SW2)

Stop bit	No.3
1	OFF ← Default Setting
2	ON

Switch between four-wire/two-wire systems (No.4 of SW2)

	four-wire/two-wire	No.4
	four-wire	OFF	← Default Setting
	two-wire	ON

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3.5 RS-422-A/RS-485 Interface Parameter Setting Procedure

Minimum response time (No.1 to 3 of SW3)

Minimum response time	No.1	No.2	No.3
0ms	OFF	OFF	OFF ← Default Setting
10ms	OFF	OFF	ON
20ms	OFF	ON	OFF
50ms	OFF	ON	ON
100ms	ON	OFF	OFF

Address (No.4 of SW3 and No.1 to 4 of SW4)

Address	No.4(SW3)	No.1(SW4)	No.2(SW4)	No.3(SW4)	No.4(SW4)
1	OFF	OFF	OFF	OFF	ON ← Default Setting
2	OFF	OFF	OFF	ON	OFF
3	OFF	OFF	OFF	ON	ON
4	OFF	OFF	ON	OFF	OFF
5	OFF	OFF	ON	OFF	ON
6	OFF	OFF	ON	ON	OFF
7	OFF	OFF	ON	ON	ON
8	OFF	ON	OFF	OFF	OFF
9	OFF	ON	OFF	OFF	ON
10	OFF	ON	OFF	ON	OFF
11	OFF	ON	OFF	ON	ON
12	OFF	ON	ON	OFF	OFF
13	OFF	ON	ON	OFF	ON
14	OFF	ON	ON	ON	OFF
15	OFF	ON	ON	ON	ON
16	ON	OFF	OFF	OFF	OFF
17	ON	OFF	OFF	OFF	ON
18	ON	OFF	OFF	ON	OFF
19	ON	OFF	OFF	ON	ON
20	ON	OFF	ON	OFF	OFF
21	ON	OFF	ON	OFF	ON
22	ON	OFF	ON	ON	OFF
23	ON	OFF	ON	ON	ON
24	ON	ON	OFF	OFF	OFF
25	ON	ON	OFF	OFF	ON
26	ON	ON	OFF	ON	OFF
27	ON	ON	OFF	ON	ON
28	ON	ON	ON	OFF	OFF
29	ON	ON	ON	OFF	ON
30	ON	ON	ON	ON	OFF
31	ON	ON	ON	ON	ON

3-10	IM DR231-11E

4.1 Introduction of Functions (Ethernet)

Connecting to the Network

The Ethernet Module DT300-41 can connect to a network conforming to IEEE802.3 through a 10BASE-T.

By connecting to a network, a PC also connected to the same network will be able to read the data measured by the DR. However, to do so, the PC must have the following application software installed.

Data Acquisition Software 32 (DP120 comes with the DR) Data Acquisition Software 32 Plus (DP320 sold separately)

These applications are used to set the IP address and other parameters, read in the measured data with the PC, and display various measurement information.

Note

•Because the IP address is not set at the time of shipment, an error will occur if you try to communicate without setting the IP address first.

What You Can Do with the Ethernet module

You can do the following things by using the Ethernet module.

Read in the DR measurement data with the PC, configure and control the DR from the PC (supports RS-232-C commands)

By using the Data Acquisition Software 32 or the Data Acquisition Software 32 Plus, you will be able to read in the DR measurement data with the PC and configure and control the DR from the PC. This is possible, because the Ethernet module supports all the commands that are supported by the RS-232-C module.

You can also create an original program using the RS-232-C commands. For details on the commands, see chapter 6.

Read in instantaneous value data

You can read in the current measured data with the PC.

Check the communication conditions

The following information can be displayed on the computer screen by using Telnet.

•Warning information.

•The socket address and connection state of the DR and the PC.

•Information about the network.

About the Ports

The Ethernet module uses separate ports for the three functions mentioned above. The number of PCs that can connect (software connections) to each of the ports varies.

Function	Port	Number of Connections
RS-232-C command port	34150	1
Reading instantaneous value data	34151	4
Checking communication conditions	34159	1

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